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Purpose: To establish an appropriate clinical protocol for early photoscreening in 12-to-24-month-old children at pediatric well-baby clinics. Methods: This prospective study included a total of 277 children aged 12–24 months who visited a pediatric well-baby clinic. All participants underwent: 1) inquiry of medical history; 2) photoscreening with PlusoptiX A12; and 3) comprehensive ophthalmologic examinations. The optimal referral cut-off point for PlusoptiX was determined by receiver operating characteristic analyses. A high-risk subgroup was defined as having a birth weight

Dravet syndrome (DS) is an uncommon epilepsy syndrome that may negatively affect the patients and their caregivers. However, reliable and valid measures of its impact on caregivers and the characteristics of patients with DS in Taiwan are lacking. This study aimed to describe the characteristics of patients with DS and concerns of their caregivers and establish a baseline frequency of disease characteristics using a cross-sectional survey in Taiwan. We assessed the caregivers of patients with DS using an online anonymous questionnaire. The seizure frequency decreased with age, although lacking statistical significance. Vaccines show no influence on the condition of patients with DS. Our findings revealed the highest impact on the domains affecting the caregivers’ daily life, including additional household tasks, symptom observation, further medical plan, and financial issues. Caregivers also expressed concerns regarding the lack of independence/constant care, seizure control, speech/communication, and impacts on siblings because of long-term care of the patients in parents’ absence. Our findings highlight the significant effects of caring for a child with DS on the lives of their caregivers in Taiwan; these findings will help raise awareness regarding the needs of these families. Furthermore, we discussed the possible pathophysiological mechanisms of associated comorbidities.

Background/purpose Having siblings is a crucial ecological factor in children's language development. Whether siblings play a role in the language development of children with developmental delays remains unknown. This study therefore aimed to assess the association between sibling presence and changes in language trajectories of children with developmental delays before reaching early school age. Methods This retrospective cohort-sequential longitudinal study analyzed data from an institution designated by Taiwan's Ministry of Health and Welfare for assessing and identifying young children with developmental delays between December 2008 and February 2016. We included 174 children, aged 10–58 months (mean [standard deviation (SD)], 31.74 [10.15] months), with developmental delays who underwent at least three waves of evaluation. The final evaluation occurred at 37–90 months of age. Data collection spanned over an age from 10 to 90 months. The primary outcome was language delays as determined by board-certified speech-language pathologists. Results Of the 174 participants (131 boys), 64.94 % (n = 113) had siblings. The likelihood of both receptive language delay and expressive language delay for participants with siblings increased gradually from 10 to 90 months and exceeded that of participants without siblings, respectively (adjusted odds ratios [aOR], 1.04, 1.04; 95 % confidence interval [CI], 1.01–1.07, 1.01–1.07; P = 0.014, 0.020). Conclusions Having siblings does not necessarily positively associate with language development in children with developmental delays. Clinicians should consider the association of sibling presence with language development for these children in a broader familial-ecological context before they reach early school age.

Dravet syndrome (DS) is a rare and devastating epilepsy syndrome, and it can affect the patients and their caregivers. However, the lack of a reliable and valid measures of caregiver impact and the characteristic pattern in Taiwan. The purpose of this study was to describe the characteristics of patients with DS and caregivers’ concerns, and to establish a baseline frequency of characteristics of the disease using a cross-sectional survey in Taiwan. We recruit the caregivers of patients with DS and assessed their condition via online anonymous questionnaire. Seizure frequency decreased with age though not statistically significant. Vaccine may not influence the condition of DS. We highlighted the greatest impact on the domains that affect caregivers’ daily life, including additional household tasks, symptoms observation, further medical plan and financial problem. Caregivers may also concern about lack of independence/constant care, seizure control, speech/communication and sibling impacts/long-term care when patents are gone. The current findings highlight the significant life effects of caring for a child with DS in Taiwan, and can be used to raise the attention about the need for these families. The possible pathogenic mechanisms of these comorbidities were also discussed.

BackgroundSiblings are crucial familial-ecological factors in children’s language development. However, it is unclear whether sibling presence is associated with language development among young children with developmental difficulties. The aim of this study was to assess the association between sibling presence and changes in language trajectories of children with developmental delay before early school age. MethodsWe performed a retrospective longitudinal cohort study from December 2008 through February 2016. The medical records of the participants were collected from an official institution designated by Taiwan’s Ministry of Health and Welfare for assessing and identifying young children with developmental difficulties. A total of 174 participants who had developmental difficulties and at least three-waves of evaluations were included in the analysis. Participants’ age ranged from 10 to 90 months. The primary outcomes were receptive and expressive language delays evaluated by board-certified speech-language pathologists. ResultsOf the 174 participants (131 boys; at the first evaluation: mean [standard deviation (SD)] age, 31.74 [10.15] months) enrolled, 64.94% (n=113) had siblings and 35.06% (n=61) did not. At the age of approximately 10 months, the probability of receptive and expressive language delays was lower in participants with siblings than in those without (adjusted odds ratios, 0.19, 0.18; 95% confidence interval [CI], 0.06-0.64, 0.04-0.80; P=0.006, 0.024, respectively). However, at 10–90 months old, this probability of language delay became gradually higher in participants with siblings than in those without, exceeding that of participants without siblings (adjusted odds ratios, 1.04, 1.04; 95% CI, 1.01-1.07, 1.01-1.07; P=0.014, 0.020, respectively)ConclusionsHaving siblings does not necessarily have a positive association on the language development of children with developmental difficulties. Clinicians should consider the association of sibling presence with language development for these children in a broader familial-ecological context.

Background: KCNQ2-associated epilepsy is most common in neonatal genetic epilepsy. A prompt diagnosis to initialize early treatment is important. Methods: We studied the electroencephalographic (EEG) changes including automated EEGs and conventional EEGs monitoring of 10 nonconsanguineous cases with KCNQ2 mutations, identified among 162 (6%) childhood epilepsy. We compared 11 (25%) non-KCNQ2 seizures videoed from 44 automated EEG and EEG monitoring. Results: Patients with KCNQ2 seizures had received more antiepileptic treatments than patients in non-KCNQ2 group. Seizures were detected in all patients with KCNQ2 epileptic encephalopathy (EE); the detection rate in KCNQ2 group was more than in patients with non-KCNQ2. The ictal recordings showed 3 newborns presented with initial lower amplitudes (20 Hz), evolving into higher-amplitude theta-delta waves. Two patient's ictal seizures showed recurrent focal tonic movements of the unilateral limbs associated with slowly continuous spikes in the contralateral hemisphere. The interictal EEGs in 5 KCNQ2 EE were burst-suppression. In 5 patients with familial KCNQ2 mutations, the interictal EEGs showed focal paroxysmal activity. Compared with 11 non-KCNQ2 EEG of ictal seizures, the differences are ictal EEGs initially appeared manifesting theta-delta waves without fast activities. In KCNQ2 seizures, patients with mutations locating in the selectivity filter controlling K+ permeability had severe EEG patterns and poor neurodevelopmental outcomes. Conclusion: Ictal EEGs in KCNQ2 seizures are unique and different from the EEGs of seizures with other etiologies. An EEG monitoring can be a valuable tool for early diagnosing KCNQ2-associated seizures and for supporting prompt treatments.

SCN2A mutations have been identified in various encephalopathy phenotypes, ranging from benign familial neonatal-infantile seizure (BFNIS) to more severe forms of epileptic encephalopathy such as Ohtahara syndrome or epilepsy of infancy with migrating focal seizure (EIMFS). Thus far, no particularly effective treatment is available for severe epileptic encephalopathy caused by SCN2A mutations in children. We present the case of a boy who developed seizures on the third day of life and received a diagnosis of EIMFS based on his clinical presentations and electroencephalography reports. Antiepileptic drugs, namely oxcarbazepine, phenytoin, valproate, levetiracetam, and clonazepam, as well as adrenocorticotropic hormone therapy failed to reduce the severity of the seizures. Seizure pattern changed to infantile spasm with extensor thrust since 5 months of age. A ketogenic diet consisting of a medium-chain triglyceride recipe was introduced at 8 months of age and the seizures were resolved in the following 10 months. A de novo mutation in SCN2A (c.573G > T; p.W191C) was proven through next-generation sequencing.

We analyzed the KCNQ2 wild-type gene and 3 mutations to highlight the important association between the KCNQ2 phenotype and genotype. The clinical phenotypes of 3 mutations (p.E515D, p.V543 M, and p.R213Q) were compared. KCNQ2, wild-type, and mutant KCNQ2 alleles were transfected into HEK293 cells before whole-cell patch-clamp analysis. Neurodevelopmental outcomes were worst in patients with the p.R213Q mutation, better in patients with the p.E515D mutation, and best in patients with the novel p.V543 M mutation. The currents in p.E515D and in p.V543 M were significantly lower than in the wild type in homomeric and heteromeric transfected HEK293 cells ( P < .05). The opening threshold shifted to values that were more positive, and the maximal current induced by strong depolarization was higher in cells with the p.E515D and p.R213Q mutations. We provide evidence that genotype is involved in determining clinical phenotype, including the seizure frequency and outcome.

Febrile seizure (FS) is the most common type of convulsion in infants and young children. The occurrence of FS in a subset of children with febrile illness suggested genetic factors may have an important effect on the predisposition of the disease. Using targeted next generation sequencing (NGS), a novel splicing variation (NM_198903.2:c.1249-1G>T) was identified in the γ-aminobutyric acid type A (GABA-A) receptor γ2 subunit (GABRG2) gene of a FS patient. To investigate possible association of FS with single nucleotide polymorphisms (SNPs) in prostaglandin-endoperoxide synthase-2 (prostaglandin G/H synthase-2; PTGS2/cyclooxygenase-2; COX2) gene involving in thermoregulatory pathway, eight SNPs, rs689465, rs689466, rs20417, rs13306038, rs201931599, rs689470, rs4648306 and rs4648308, along with 2 previously reported variations in IL1RN (86-bp VNTR) and IL10 (rs1900872) were genotyped and utilized for case-control association studies on 35 FS and 31 non-FS controls. A single SNP (rs689466) localized at 5'-1192 of the PTGS2 gene exhibited significant association with FS (p=0.045) based on case-control allelic association analyses. A significant decrease in the frequency of the G allele in FS (0.357) was observed compared to that in controls (0.536) with an estimated odds ratio (OR) of 0.48 (95% CI, 0.23-0.99) for the G versus A allele. Using case-control genotypic association analysis, the -1192 A allele is most likely to confer susceptibility to FS by a recessive action model (p=0.045, pointwise empirical p value (EMP1)=0.049). The association of SNPs in PTGS2, in addition to IL6, IL-6 receptor (IL6R) and prostaglandin E receptor 3 (PTGER3) in prior reports, with FS suggests their possible action in concert to modulate phenotypes in FS as well as the involvement of thermoregulatory pathway in pathogenesis of FS.

Background Epilepsy caused by a KCNQ2 gene mutation usually manifests as neonatal seizures during the first week of life. The genotypes and phenotypes of KCNQ2 mutations are noteworthy. Methods The KCNQ2 sequencings done were selected from 131 nonconsanguineous pediatric epileptic patients (age range: 2 days to 18 years) with nonlesional epilepsy. Results Seven (5%) index patients had verified KCNQ2 mutations: c.387+1 G>T (splicing), c.1741 C>T (p.Arg581*), c.740 C>T p.(Ser247Leu), c.853 C>A p.(Pro285Thr), c.860 C>T p.(Thr287Ile), c.1294 C>T p.(Arg432Cys), and c.1627 G>A p.(Val543Met). We found, after their paternity had been confirmed, that three patients had de novo p.(Ser247Leu), p.(Pro285Thr), and p.(Thr287Ile) mutations and neonatal‐onset epileptic encephalopathy; however, their frequent seizures remitted after they turned 6 months old. Those with the c.387+1G>T (splicing), (p.Arg581*), and p.(Val543Met) mutations presented with benign familial neonatal convulsions. In addition to their relatives, 14 patients had documented KCNQ2 mutations, and 12 (86%) had neonatal seizures. The seizures of all five patients treated with oxcarbazepine remitted. Conclusion KCNQ2‐related epilepsy led to varied outcomes (from benign to severe) in our patients. KCNQ2 mutations accounted for 13% of patients with seizure onset before 2 months old in our study. KCNQ2 mutations can cause different phenotypes in children. p.(Pro 285Thr) is a novel mutation, and the p.(Pro 285Thr), p.(Ser247Leu), and p.(Thr287Ile) variants can cause neonatal‐onset epileptic encephalopathy.

BackgroundAbsence seizures are a subtype of epileptic seizures clinically characterized by transient alterations in states of consciousness and by electroencephalography indicating diffuse spike-wave discharges (SWD). Conventional brain magnetic resonance imaging (MRI) is not routinely used to establish the diagnosis, but rather to rule out other diseases. The present study investigated tissue integrity in children with SWD epilepsy using diffusion tensor imaging (DTI).MethodsMagnetic resonance imaging (MRI)-DTI was conducted in 18 patients with absence seizures and 10 control participants. Brain areas were evaluated using diffusion maps, and fractional anisotropy (FA), mean diffusivity (MD), parallel diffusivity (λ||), and perpendicular diffusivity (λ⊥) values were extracted and analyzed. Tractography at the regions of abnormal diffusion indices was then reconstructed in each group, and tract symmetry was evaluated by an index of asymmetry (AI). Statistical analyses were performed using nonparametric Mann–Whitney U tests, with p values

Background Cyclin-dependent kinase-like 5 (CDKL5), which maps to chromosome Xp22.13 and contains 20 coding exons, has been recognized as the gene responsible for early-onset epileptic encephalopathy (EoEE). A retrospective study is carried out to analyze potential genotypic and phenotypic differences between male and female patients with CDKL5 mutations. Materials and methods Targeted next-generation DNA sequencing was employed to search for mutations in patients with cryptogenic EE. A total of 44 patients with EoEE/infantile spasms (ISs)/West syndrome were enrolled for pathogenic mutation screening. The clinical phenotypes of patients with CDKL5 mutations were analyzed and compared with those of 166 published cases. Results One novel and three recurrent mutations were found in four enrolled patients (two boys and two girls). One female patient had partial seizures during the early infantile period and epileptic spasms and tonic seizures several weeks thereafter. The other female patient had IS with hypsarrhythmia. The two male patients had IS without typical hypsarrhythmia and were bedridden. Brain MRIs of the male patients revealed brain atrophy and white matter hyperintensity. The female patients exhibited autistic features with hand stereotypies. Conclusion Our study highlights that both girls and boys with IS harbor CDKL5 mutations. Male children with CDKL5 mutations demonstrate a higher frequency of infantile spasms and brain atrophy, whereas female children often exhibit atypical Rett syndrome with EoEE. In addition, male children have a more severe phenotype than female children.

Purpose Epileptic encephalopathies (EEs) are the severe form of childhood epilepsy and phenotypically heterogeneous disorders with different underlying genetic defects. EEs are always accompanied with developmental delay/mental retardation and behavior problems. Finding the genetic basis of epileptic encephalopathies with developmental delay/mental retardation can be valuable not only for diagnosis but also for guiding treatment and providing disease prognosis. Methods and Results A customized panel of 90 genes related to epileptic encephalopathies was utilized to screen for potential genetic variants via targeted next generation sequencing (NGS). A total of 78 children with epilepsy and developmental delay/mental retardation were analyzed with an average read depth of 265.3 ± 68.3X. Mutations were found in 23 (9 boys and 14 girls) probands, and the overall mutation identification rate was 29.5% (25.0% for males and 33.3% for females). Fifteen (65.2%) mutations involve ion channels, including SCN1A, KCNT1, SCN2A, SCN8, KCNB1 and KCNQ2. The other (34.8%) mutations involve CDKL5, ALG13, GFAP, SNAP25, STXBP1 and SYNGAP1. Sixteen (69.6%) of the identified mutations were confirmed to be de novo and one (4.3%) was found to be paternal mosaicism. Channelopathies were found to be the major cause of both early onset (≤6 months) and later onset of unclassified EE as well as febrile seizure cases. On the contrary, patients with infantile spasms or West syndrome were mainly caused by mutations in non-ion channel proteins, whereas patients of epilepsy with developmental delays and/or mental retardation were caused by mutations in both channel and non-channel genes. Conclusion NGS is a valuable and reliable diagnostic tool to detect the gene mutation in epileptic children with developmental delay/mental retardation. This cost-effective method shortens the course from seizure onset to genetic diagnosis. By understanding the gene mutations and genotypephenotype correlation better, clinical practitioners could provide the optimal anticonvulsant and treatment.

Epileptic encephalopathies are highly heterogeneous and phenotypical disorders with different underlying genetic defects. Mutations in the SCN2A gene cause different epilepsy syndromes, including epilepsy of infancy with migrating focal seizures, Ohtahara syndrome, and West syndrome. We utilized a targeted next generation sequencing (NGS) approach on a girl with early-onset seizures and Rett-like features, including autistic behavior, limited hand function with chorea, and profound intellectual disability, to identify novel missense mutation (c.1270G>A; p.V424M) in the SCN2A gene, which encodes the αII-subunit of the voltage-gated Na+ channel (Nav1.2). The identified SCN2A mutation responsible for the development of the disease is confirmed to be de novo for the proband. Our findings broaden the clinical spectrum of SCN2A mutations, which resembles clinical phenotypes of SCN1A mutations by manifesting as fever sensitive seizures, and highlights that SCN2A mutations are an important cause of early-onset epileptic encephalopathies with movement disorders. In addition, the use of levetiracetam to treat SCN2A epileptic encephalopathy, when Na+ channel-blocking anticonvulsants are ineffective, is also recommended.

Background X-linked adrenoleukodystrophy is caused by a defective peroxisomal membrane transporter, ABCD1, responsible for transporting very-long-chain fatty acid substrate into peroxisomes for degradation. The main biochemical defect, which is also one of the major diagnostic hallmarks, of X-linked adrenoleukodystrophy is the accumulation of saturated very-long-chain fatty acids in all tissues and body fluids. Methods Direct and reverse-transcribed polymerase chain reactions followed by DNA sequencing-based mutational analyses were performed on one Taiwanese and three Malaysian X-linked adrenoleukodystrophy families. Results A novel splicing donor site mutation (c.1272+1g>a) was identified in a Taiwanese X-linked adrenoleukodystrophy patient, resulting in a deletion of 121 bp and a premature stop codon (p.Val425fs*92) in messenger-RNA transcript. This deletion is caused by the activation of a cryptic splicing donor site in exon 4 of the ABCD1 gene, which is consistent with the prediction by several online algorithms. In addition, three previously described missense mutations (c.965T>C, c.1978C>T, and c.2006A>G), leading to aberrant ABCD1 of p.Leu322Pro, p.Arg660Trp, and p.His669Arg, were also identified in Malaysian probands. Conclusions This is the first report to unveil unequivocally that cryptic splicing-induced aberrant messenger-RNA carrying an internal frameshift deletion results from an intronic mutation in the ABCD1 gene. Furthermore, a polymorphism in intron 9 (c.1992-32c/t; refSNP: rs4898368) of the ABCD1 gene was commonly observed in both Taiwanese and Malaysian populations.

Background Increased prevalence of attention-deficit/hyperactivity disorder (ADHD) in children with allergic rhinitis (AR) has been reported. Our previous study showed that children with untreated AR had higher ADHD scores than did the controls. Objective This prospective follow-up study aimed to investigate whether elevated ADHD scores in children with AR could be decreased by AR treatment. Methods Sixty-eight children with AR (age range, 6-14 years) and who were drug naive were enrolled and evaluated by AR symptom score, ADHD symptom scores, and computerized continuous performance test, before and after AR therapy, which included nonpharmacologic intervention, oral antihistamines, and topical steroids. Thirty-one age-matched controls and 13 children with pure ADHD were also enrolled for comparison. The relationship between the AR and ADHD score change was analyzed by a partial correlation test, and univariate and multivariate linear regression models were applied to investigate possible predictors for the improvement of ADHD scores by AR treatment. Results AR symptom scores in children with AR decreased significantly after treatment (p < 0.001), and their ADHD scores also decreased significantly (p < 0.001). An improved AR symptom score was positively correlated with improved detectability (rp = 0.617, p = 0.001) and commission error (rp = 0.511, p = 0.011). Significant predictors for the improvement of ADHD scores included age, AR drugs, AR subtypes, and multiple atopic diseases (ps < 0.05). Conclusion Higher ADHD scores in children with AR compared with healthy controls decreased significantly with AR treatment. For children with AR and borderline ADHD symptoms, who do not meet full ADHD diagnostic criteria, we recommend initially treating their AR and monitoring improvement of ADHD symptoms.

Summary Purpose: Genetic mutations of the cyclin-dependent kinase-like 5 gene (CDKL5) have been reported in patients with epileptic encephalopathy, which is characterized by intractable seizures and severe-to-profound developmental delay. We investigated the clinical relevance of CDKL5 alterations in both genders. Methods: A total of 125 patients with epileptic encephalopathy were examined for genomic copy number aberrations, and 119 patients with no such aberrations were further examined for CDKL5 mutations. Five patients with Rett syndrome, who did not show methyl CpG-binding protein 2 gene (MECP2) mutations, were also examined for CDKL5 mutations. Key Findings: One male and three female patients showed submicroscopic deletions including CDKL5, and two male and six female patients showed CDKL5 nucleotide alterations. Development of early onset seizure was a characteristic clinical feature for the patients with CDKL5 alterations in both genders despite polymorphous seizure types, including myoclonic seizures, tonic seizures, and spasms. Severe developmental delays and mild frontal lobe atrophies revealed by brain magnetic resonance imaging (MRI) were observed in almost all patients, and there was no gender difference in phenotypic features. Significance: We observed that 5% of the male patients and 14% of the female patients with epileptic encephalopathy had CDKL5 alterations. These findings indicate that alterations in CDKL5 are associated with early epileptic encephalopathy in both female and male patients.

Summary We performed STXBP1 mutation analyses in 86 patients with various types of epilepsies, including 10 patients with OS, 43 with West syndrome, 2 with Lennox-Gastaut syndrome, 12 with symptomatic generalized epilepsy, 14 with symptomatic partial epilepsy, and 5 with other undetermined types of epilepsy. In all patients, the etiology was unknown, but ARX and CDKL5 mutations were negative in all cases. All coding exons of STXBP1 were analyzed by direct-sequencing. Two de novo nucleotide alterations of STXBP1 were identified in two patients with Ohtahara and West syndrome, respectively. No de novo or deleterious mutations in STXBP1 were found in the remaining 84 patients with various types of symptomatic epilepsies. This is the first case report showing that STXBP1 mutations caused West syndrome from the onset of epilepsy. STXBP1 analysis should be considered as an etiology of symptomatic West syndrome without explainable cause.

Purpose: To investigate the effectiveness and tolerability of topiramate (TPM) in treating children with CNS anomalies and intractable epilepsy.Methods: We retrospectively searched the patient database in National Taiwan University Hospital for candidate children (younger than 18 years of age) with epilepsy and CNS anomalies from December 2002 to February 2004. The effectiveness and possible side effects of TPM were evaluated by questionnaire.Results: Twenty-two children (9 males, 13 females) aged from five months to fourteen years were enrolled in the present study. Underlying CNS anomalies were proliferation disorders (n=10), migration/organization disorders (n=10), and neurocutaneous syndromes (n=2). Types of epilepsy at TPM add-on were symptomatic partial epilepsy (n=11), infantile spasms (n=7), and Lennox-Gastaut syndrome (n=4). During the follow-up periods of six to 30 months, eight patients (36%) had more than 50% reduction of seizures and four patients (18%) were seizure-free. The average dosages of TPM ranged from 2.5 to 25 mg⁄kg⁄day. Patients with proliferation disorders or infantile spasms responded better to TPM therapy. The most common side effect was oligohidrosis (n=9, 41%).Conclusion: TPM is a safe and promising add-on anticonvulsant for epileptic children with CNS anomalies. Hypohidrosis is one of the major side effects of TPM treatment.

Early intervention requires a comprehensive report and compilation of data from various assessments to confirm diagnoses and provide follow-up treatment suggestions. Previously, without the assistance of an information system for inputting and processing data, assessment data was compiled through e-mail communications. E-mailing back and forth and waiting for confirmation through phone calls reduced efficiency and delayed the scheduling of follow-up visits for patients to receive treatment suggestions and examination reports. Therefore, implementing an online system for data input, compilation, and statistical analysis can dramatically improve the administration efficiency and service satisfaction, facilitating the delivery of services, the development of related techniques, and reduce the load of medical staff.

Inattention (IA) has been a major problem in children with attention deficit/hyperactivity disorder (ADHD), accounting for their behavioral and cognitive dysfunctions. However, there are at least three processing steps underlying attentional control for auditory change detection, namely pre-attentive change detection, involuntary attention orienting, and attention reorienting for further evaluation. This study aimed to examine whether children with ADHD would show deficits in any of these subcomponents by using mismatch negativity (MMN), P3a, and late discriminative negativity (LDN) as event-related potential (ERP) markers, under the passive auditory oddball paradigm. Two types of stimuli—pure tones and Mandarin lexical tones—were used to examine if the deficits were general across linguistic and non-linguistic domains. Participants included 15 native Mandarin-speaking children with ADHD and 16 age-matched controls (across groups, age ranged between 6 and 15 years). Two passive auditory oddball paradigms (lexical tones and pure tones) were applied. The pure tone oddball paradigm included a standard stimulus (1000 Hz, 80%) and two deviant stimuli (1015 and 1090 Hz, 10% each). The Mandarin lexical tone oddball paradigm’s standard stimulus was /yi3/ (80%) and two deviant stimuli were /yi1/ and /yi2/ (10% each). The results showed no MMN difference, but did show attenuated P3a and enhanced LDN to the large deviants for both pure and lexical tone changes in the ADHD group. Correlation analysis showed that children with higher ADHD tendency, as indexed by parents’ and teachers’ ratings on ADHD symptoms, showed less positive P3a amplitudes when responding to large lexical tone deviants. Thus, children with ADHD showed impaired auditory change detection for both pure tones and lexical tones in both involuntary attention switching, and attention reorienting for further evaluation. These ERP markers may therefore be used for the evaluation of anti-ADHD drugs that aim to alleviate these dysfunctions.

X-linked adrenoleukodystrophy is a neurodegenerative disorder with highly variable clinical presentation, including the childhood cerebral form, adult form adrenomyeloneuropathy, and Addison disease. The biochemical hallmark of the disorder is the accumulation of saturated very long chain fatty acids in all tissues and body fluids. This accumulation results from mutations in the ABCD1 gene localized to Xq28. Using polymerase chain reaction and direct sequencing of deoxyribonucleic acid, we identified five novel mutations, including a microdeletion (1624 del ATC), a splicing site mutation (intervening sequence 1 [IVS1] -2a>c), and three missense mutations (1172 T>C, 1520 G>A, and 1754 T>C), from Taiwanese kindred with X-linked adrenoleukodystrophy. A polymorphism involving a single nucleotide deletion in the intervening sequence 5 (IVS5 -6 del c) of the ABCD1 gene, previously misattributed as a mutation in the Chinese population, was also identified. The dinucleotide deletion (1415 del AG) mutation common in Japan and Western countries was not found as frequently in the Chinese and Taiwanese populations. Instead, a higher mutation frequency was observed in exon 6 of the ABCD1 gene among Japanese, Chinese, and Taiwanese kindred with X-linked adrenoleukodystrophy, representing a potential mutational hotspot for future mutational screening among these Asian populations.

Agyria-pachygyria complex is a disorder of neuronal migration and organization. Patients suffer either motor or intellectual retardation. We report our experiences of 10 patients with agyria-pachygyria complex and evaluate their clinical features, electroencephalography, and evoked potentials. Of nine electroencephalography examinations, five patients demonstrated characteristically high-amplitude fast activity. One of nine patients had an abnormal brainstem auditory-evoked potential. Three of seven patients had abnormal goggled visual-evoked potential. Six patients received somatosensory-evoked potential examinations, and five of these were abnormal, including four with prolonged central conduction times. Of the 10 patients, eight survived with variable intellectual and motor retardation; two died of sepsis. Patients with grades 1-4 agyria-pachygyria had high incidences of somatosensory-evoked potential abnormalities and also suffered worse neurologic outcomes. Normal brainstem auditory-evoked potential but abnormal cortical somatosensory-evoked potential components and prolonged central conduction time in these patients indicate that agyria-pachygyria is a supratentorial disease. We conclude that somatosensory-evoked potential examination is supplemental to neuroimaging in predicting the neurologic prognosis of patients with agyria-pachygyria.

An 8-year-old female was diagnosed with Miller-Dieker syndrome with typical facial presentation. Brain magnetic resonance imaging disclosed lissencephaly, and chromosome study revealed 17p13.3 deletion. She developed infantile spasms at an early age, and her seizures were poorly controlled by multiple antiepileptics. Recurrent urinary tract infections were diagnosed during routine out-patient department follow-up. Urodynamic study disclosed a neurogenic bladder. Spinal magnetic resonance imaging revealed a tethered cord resulting from tight filum terminale, and untethering surgery was performed. Four months after the surgery, repeated urine cultures indicated that she was free from the urinary tract infection. Urodynamic study after untethering surgery demonstrated improved compliance of the urinary bladder.

Genetic mutations of the cyclin-dependent kinase-like 5 gene (CDKL5) have been reported in patients with epileptic encephalopathy, which is characterized by intractable seizures and severe-to-profound developmental delay. We investigated the clinical relevance of CDKL5 alterations in both genders.A total of 125 patients with epileptic encephalopathy were examined for genomic copy number aberrations, and 119 patients with no such aberrations were further examined for CDKL5 mutations. Five patients with Rett syndrome, who did not show methyl CpG-binding protein 2 gene (MECP2) mutations, were also examined for CDKL5 mutations.One male and three female patients showed submicroscopic deletions including CDKL5, and two male and six female patients showed CDKL5 nucleotide alterations. Development of early onset seizure was a characteristic clinical feature for the patients with CDKL5 alterations in both genders despite polymorphous seizure types, including myoclonic seizures, tonic seizures, and spasms. Severe developmental delays and mild frontal lobe atrophies revealed by brain magnetic resonance imaging (MRI) were observed in almost all patients, and there was no gender difference in phenotypic features.We observed that 5% of the male patients and 14% of the female patients with epileptic encephalopathy had CDKL5 alterations. These findings indicate that alterations in CDKL5 are associated with early epileptic encephalopathy in both female and male patients.

Peroxisomes are organelles responsible for multiple metabolic pathways including the biosynthesis of plasmalogens and the oxidation of branched-chain as well as very-long-chain fatty acids (VLCFAs). Peroxisomal disorders (PDs) are heterogeneous groups of diseases and affect many organs with varying degrees of involvement. Even pathogenetically distinct PDs share some common symptoms. However, several PDs have uniquely characteristic clinical findings. The durations of survival in PDs are also variable. Infants with PDs are usually presented with developmental delay, visual and hearing impairment. Generalized hypotonia is present in severe cases. Epileptic seizures are also a common characteristic of patients with certain PDs. Nonetheless, the classification and evolution of epilepsy in PDs have not been elucidated in detail. Here, we review the relevant literatures and provide an overview of PDs with particular emphasis on the characteristics of seizures in infants.

We performed STXBP1 mutation analyses in 86 patients with various types of epilepsies, including 10 patients with OS, 43 with West syndrome, 2 with Lennox-Gastaut syndrome, 12 with symptomatic generalized epilepsy, 14 with symptomatic partial epilepsy, and 5 with other undetermined types of epilepsy. In all patients, the etiology was unknown, but ARX and CDKL5 mutations were negative in all cases. All coding exons of STXBP1 were analyzed by direct-sequencing. Two de novo nucleotide alterations of STXBP1 were identified in two patients with Ohtahara and West syndrome, respectively. No de novo or deleterious mutations in STXBP1 were found in the remaining 84 patients with various types of symptomatic epilepsies. This is the first case report showing that STXBP1 mutations caused West syndrome from the onset of epilepsy. STXBP1 analysis should be considered as an etiology of symptomatic West syndrome without explainable cause.

Array-based comparative genomic hybridization identified a 2.3-Mb microdeletion of 17p13.2p13.1 in a boy presenting with moderate mental retardation, intractable epilepsy and dysmorphic features. This deletion region was overlapped with the previously proposed shortest region overlapped for microdeletion of 17p13.1 in patients with mental retardation, microcephaly, microretrognathia and abnormal magnetic resonance imaging (MRI) findings of cerebral white matter, in which at least 17 known genes are included. Among them, DLG4/PSD95, GPS2, GABARAP and KCTD11 have a function in neuronal development. Because of the functional importance, we paid attention to DLG4/PSD95 and GABARAP, and analyzed zebrafish in which the zebrafish homolog of human DLG4/PSD95 and GABARAP was knocked down and found that gabarap knockdown resulted in small head and hypoplastic mandible. This finding would be similar to the common findings of the patients with 17p13.1 deletions. Although there were no pathogenic mutations in DLG4/PSD95 or GABARAP in a cohort study with 142 patients with idiopathic developmental delay with/without epilepsy, further studies would be required for genes included in this region.

Children with developmental delay or mental retardation (DD/MR) are commonly en countered in child neurology clinics, and establishing an etiologic diagnosis is a challenge for child neurologists. Among the etiologies, chromosomal imbalance is one of the most important causes. However, many of these chromosomal imbalances are submicroscopic and cannot be detected by conventional cytogenetic methods. Microarray-based comparative genomic hybridization (array CGH) is considered to be superior in the investigation of chromosomal deletions or duplications in children with DD/MR, and has been demonstrated to improve the diagnostic detection rate for these small chromosomal abnormalities. Here, we review the recent studies of array CGH in the evaluation of patients with idiopathic DD/MR.

We report on a 2-year-old boy with facial dysmorphism, multiple lentigines, and hypertrophic cardiomyopathy. Mutation analyses of the patient and his mother revealed a Y279G mutation in exon 7 of the PTPN11 gene. The presence of LEOPARD syndrome was confirmed by a genetic study and clinical phenotypes. Since age 18 months, the patient had manifested frequent seizures that were poorly controlled by multiple anticonvulsants. Neurologic examinations indicated severe developmental delay and sensorineural deafness. Brain imaging demonstrated open-lip schizencephaly in the right frontoparietal area. Central nervous system anomalies are rarely reported in this disease. To the best of our knowledge, this is the first report of LEOPARD syndrome with associated schizencephaly. Psychomotor retardation is not uncommon in LEOPARD syndrome. We advocate brain-imaging studies of patients with LEOPARD syndrome and neurologic abnormalities such as developmental delay or epilepsy.

The trace element manganese is usually supplied when total parenteral nutrition is used. However, long-term parenteral administration of manganese, which bypasses the normal regulatory mechanism, may cause hypermanganesemia. Manganese poisoning presents clinically with parkinsonian-like symptoms and psychological changes. Seizures are a rare presentation of this disease. This report describes a 10-year-old female who had received total parenteral nutrition for 3 months because of short bowel syndrome, and presented with tonic-clonic seizure, decreased level of consciousness, and fever. The serum electrolytes, glucose and the cerebrospinal fluid examination were normal. The blood culture grew Pantoea agglomerans. The brain magnetic resonance imaging disclosed no evidence of central nervous system infection. However, symmetric high-intensity signal on T1-weighted images was documented in the basal ganglia, especially in the globus pallidus. Her whole blood manganese level was 3.7 microg/dL, which was significantly higher than the normal range (0.4-1.4 microg/dL). Diagnosis of hypermanganesemia related to total parenteral nutrition was made.

Pediatric populations are at risk for medication errors that may be associated with mortality and disability. The purpose of this study was to describe the clinical manifestations of seven newborns following an event of accidental intramuscular injection of atracurium and to assess the impact on neurodevelopmental outcome. This study enrolled seven newborns who were accidentally administered 10 mg of atracurium, equivalent to 2.6–3.3 mg/kg, in a local perinatal clinic. Accident reports and hospital records were reviewed to obtain the history and medical data for the event. The survivors were prospectively examined for their growth, health and neurodevelopment until 24 months of age. All newborns showed immediate apnea and cyanosis requiring resuscitation after atracurium injection and presented with respiratory failure and flaccid paralysis on arrival for emergency medical services. One newborn was asystolic despite resuscitation and died of multiple organ failure. Of the five survivors available for follow-up, all achieved favorable growth outcomes. However, four showed mild to significant delay in development; and two manifested mild hypomyelination of cerebral white matter on the brain magnetic resonance imaging. Conclusion: Newborns accidentally injected with high doses of atracurium are at risk of death and neurodevelopmental delay. The serious clinical manifestations, developmental delay and cerebral hypomyelination were most likely due to insufficient immediate respiratory assistance following atracurium injection.

X-linked adrenoleukodystrophy (X-ALD) is a peroxisomal disorder and identified in many races without apparent predilection for any race. This study was designed to investigate the clinical and therapeutic aspects of X-ALD in Taiwanese children with this disorder. We retrospectively reviewed all children admitted to NTUH from Nov. 1993 to Aug. 2002 with the diagnosis of ALD, defined by increased very long chain fatty acid (VLCFA). The mean age at diagnosis of the patients was 7.4 years (range, 2.8 to 13 years). Seven out of 9 patients had abnormal brain magnetic resonance image (MRI) studies. Three patients received bone marrow transplantation. Of these, two died of severe graft-versus-host disease and the other remained stable. Of the remaining 6 patients, two patients were in vegetative status and the other two patients were neurologically normal. X-ALD in Taiwanese children had similar clinical manifestations as reviewed in western countries. Symmetrical demyelination in parieto-occipital region and the accumulation of contrast material at the edge of the lesion are the typical MRI findings. Proton MR spectroscopy (MRS) can be used to evaluate either the asymptomatic patient or patient with normal brain image. Performance of T-cell depletion bone marrow transplantation or cord blood transplantation is suggested for X-ALD with early cerebral involvement.