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Erythema nodosum (EN), although relatively uncommon in the pediatric population, is the most frequent type of panniculitis in children. The present study aimed to report all the cases of children admitted to our tertiary pediatric hospital with the diagnosis of EN to evaluate the epidemiology, clinical manifestations, etiology, treatment, and the course of this disease in the pediatric age. This observational study retrospectively considered all children evaluated to the emergency room (ER) of Meyer Children's University Hospital, Florence, Italy, discharged with a diagnosis of EN over a 12-year period (from January 2009 to December 2021). Clinical and laboratory data were recorded using a standardized report form. Sixty-eight patients with EN were included. The etiologic diagnosis of EN was made in 38 children (55.9%): 29 (42.6%) had infection-related EN (in particular EBV and β-hemolytic streptococcus), 6 (8.8%) had Crohn's disease, 1 celiac disease, 1 Sjogren syndrome, and 1 Hodgkin lymphoma. In 30 patients (45%), no definitive diagnosis was reached, and they were defined as having idiopathic EN. Most of the laboratory tests were nonspecific. No statistical differences were found in the demographic and clinical data, and the main diagnostic laboratory parameters between patients with idiopathic EN versus those with secondary EN. Conclusion: Since EN can be isolated or the first manifestation of heterogeneous underlying pathologies, some of which can be severe and life-threatening, it is important to recognize it and carry out all the necessary etiological diagnostic investigations to understand its etiology and start the specific treatment. What is Known: • Erythema nodosum (EN) is the most frequent type of panniculitis in children. • It has been associated with a wide spectrum of disorders, such as different types of infection, malignancies, chronic inflammations, and drugs. What is New: • No statistical differences can be found in clinical features as well as laboratory data, between patients with idiopathic EN versus those with secondary EN. • A broad spectrum of investigations and a proper follow-up should be taken into account in order to prevent a delayed or missed secondary EN diagnosis. [ABSTRACT FROM AUTHOR]

This document is a correction notice for an article titled "Erythema nodosum in children: a cohort study from a tertiary pediatric hospital in Italy" published in the European Journal of Pediatrics. The correction addresses an error in the affiliations of the authors. The correct affiliations are provided in the correction notice. The original article has been corrected. The publisher, Springer Nature, remains neutral regarding jurisdictional claims and institutional affiliations. The authors of the article are Sarah Abu-Rumeileh, Federica Barbati, Giuseppe Indolfi, and Sandra Trapani. [Extracted from the article]

Paediatric Menetrier disease (PMD) is a protein-losing gastropathy, presenting with generalized oedema and abdominal symptoms. PMD commonly has an acute course and may be associated with Cytomegalovirus (CMV) infection. The aim of this retrospective study is to assess the epidemiological and clinical data, diagnostic procedures, treatment and outcome of CMV-associated PMD. The medical charts of the patients with PMD and CMV infection diagnosed at our hospital have been reviewed. Then, a systematic literature's review of all the cases of PMD and a selection of those associated with CMV infection have been performed. Three previously healthy boys were admitted for vomiting and oedema. Endoscopy showed hypertrophic gastric folds and CMV infection was diagnosed. Albumin was administered in all cases, with clinical resolution within few weeks. In literature, PMD has been described in 150 children and the association between CMV and PMD was found in 89 cases. Clinical and laboratory data, radiological and histological exams, therapy and outcome were reviewed.Conclusions: Basing on the present experience and on the current knowledge, PMD has a benign course without long-term sequelae. Although PMD is rare in children, we recommend paediatricians to consider CMV-related PMD when facing children with vomiting and diffuse oedema. What is Known: • Paediatricians should consider Menetrier disease (MD) when facing oedematous child complaining of abdominal symptoms with hypoalbuminemia, without proteinuria and liver dysfunction. • Typical ultrasound features (hypertrophic gastric folds) suggest such condition which requires endoscopy and biopsy for definitive diagnosis. What is New: • A familial susceptibility to CMV gastric infection has been recently suggested; thus when suspecting MD, the family history of gastric diseases should be investigated. • Menetrier disease has been found associated with other unusual conditions either benign (such as gastric bezoar) or malign as neoplasms (acute lymphatic leukaemia and adenocarcinoma) even in children. [ABSTRACT FROM AUTHOR]

This study aims to investigate the sensitivity of microscopy, culture and polymerase chain reaction on three gastric aspirates (GAs) in the microbiological confirmation of active pulmonary tuberculosis (TB) and to identify possible changes in sensitivity derived from the collection of a different number of aspirates. Children with clinical and radiological diagnoses of active pulmonary TB who underwent three GAs between March 2007 and June 2019 were retrospectively evaluated. Clinical, radiological, and microbiological data were collected. The sensitivity of microbiological tests on GAs was calculated. Moreover, differences in sensitivity according to age and radiological pattern were investigated. Overall, 156 children with active pulmonary TB were enrolled with a median age of 51.5 (IQR: 25.2–113.2) months. Microbiological investigations on the first GA showed a sensitivity of 34% (95%CI 26.7, 42), the cumulative sensitivity of first and second GAs was 40.4% (95%CI 32.7, 48.5) and of the three GAs was 47.4% (95%CI 39.8, 55.2). The collection of three GAs leads to an overall increase in sensitivity of the first GA by 13.4% (95%CI 2.8, 24.1%; p=0.014). Moreover, the increase in sensitivity was significantly higher in children ≤ 4 years of age and in those with uncomplicated TB (p=0.008). Conclusions: Performing a higher number of GAs increases the sensitivity of microbiological confirmation of active pulmonary TB, particularly in children ≤ 4 years and with an uncomplicated radiological pattern. What is known: • The diagnosis of paediatric tuberculosis is a challenge for paediatricians • Despite their low sensitivity gastric aspirates represent the standard sample for microbiological confirmation of active pulmonary tuberculosis in children • Most international guidelines recommend performing three sequential gastric aspirates on three consecutive days What is new: • A significant increase in global sensitivity by 13.4% was found by the collection of three gastric aspirates compared to the first one • Performing a higher number of gastric aspirates increases the sensitivity of microbiological confirmation, particularly in children ≤ 4 years and with an uncomplicated radiological pattern [ABSTRACT FROM AUTHOR]

A letter to the editor is presented in response to the article "Spontaneous Clearance of Hepatitis C Virus in Vertically Infected Children. Any Clue for Treatment?."