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Objective: Several studies in the literature have used contrast-enhanced magnetic resonance imaging to investigate arachnoid granulations protruding into the cranial dural sinuses. The current study aimed to investigate the protrusion of arachnoid granulations into the superior sagittal sinus, transverse sinus, straight sinus, and confluence of sinuses and determine the frequency of brain herniation into giant arachnoid granulations using contrast-enhanced 3-dimensional T1-weighted magnetic resonance imaging. Materials and Methods: Images of 550 patients with intra-sinus arachnoid granulations who underwent contrast-enhanced 3-dimensional T1-weighted thin-slice magnetic resonance imaging were retrospectively re-evaluated. Only 300 patients with at least 1 intra-sinus arachnoid granulation were included in the study. The protrusion of arachnoid granulations into superior sagittal sinus, transverse sinus, straight sinus, and confluence of sinuses was investigated. In addition, large arachnoid granulations and brain herniations into arachnoid granulations were also noted. Results: A total of 889 focal filling defects of arachnoid granulations, at least 1 in the dural sinus, were detected. Of the filling defects of arachnoid granulations, 183 were in the right transverse sinus, 222 in the left transverse sinus, 265 in superior sagittal sinus, 185 in straight sinus, and 34 in confluence of sinuses. Brain herniation into arachnoid granulations was detected in 8 (2.7%) of the patients included in the study. All the filling defects detected in the dural sinuses on post-contrast 3-dimensional T1-weighted images were isointense with cerebrospinal fluid and had round, oval, or lobulated contours. A positive weak correlation was found between patient age and the size and number of arachnoid granulations (r = 0.181, P < .01 and r = 0.207, P < .001, respectively). It was observed that the size and number of arachnoid granulations increased as the age of the patients increased. Conclusions: The distribution, shape, number, and size of intra-sinus arachnoid granulations can vary considerably. Brain herniation into arachnoid granulation can also be seen. Three-dimensional cranial magnetic resonance imaging sequences can be safely used in the evaluation of arachnoid granulations. [ABSTRACT FROM AUTHOR]

Patients with traumatic intracranial subarachnoid hemorrhage (SAH) rarely develop spinal subarachnoid hemorrhage (SSAH) without direct spinal injury. We present the case of a 76-year-old male patient with traumatic intracranial SAH and subdural hematoma, back pain and weakness in the both lower limbs radiating to the legs three days after the trauma. After worsening of pain and numbness, the patient underwent a lumbar magnetic resonance imaging 7 days after the trauma, in which blood was seen in the spinal canal in the lumbosacral region. The bleeding was considered SSAH because of the liquid level. The patient underwent conservative treatment because the patient was found to be at high cardiac risk and the neurological deficit was mild. In patients with traumatic intracranial hemorrhage and delayed pain or neurological deficits, SSAH should be suspected in the first period of trauma. [ABSTRACT FROM AUTHOR]

Hypertrophic olivary degeneration (HOD) is a rare form of transsynaptic degeneration and is the only type which occurs with hypertrophy rather than atrophy. It develops due to pathologies affecting conduction in the dentato-rubro-olivary pathway. Despite being the classic HOD-related findings, palatal tremor, Holmes tremor, nystagmus, and cerebellar ataxia are not usually present in patients. Most cases are asymptomatic, and HOD is incidentally detected on magnetic resonance imaging scans. This paper reports the case and imaging results of a 60-year-old male patient that presented with findings of acute infarction at the posterior aspect of the mesencephalon and pons and superior cerebellar peduncle following head trauma and developed right contralateral HOD. [ABSTRACT FROM AUTHOR]

Cervical ectopic thymus (CET) is one of the rare causes of cervical masses in childhood. These lesions manifest with the same echo and signal intensity as the natural thymus on ultrasonography (US) and magnetic resonance imaging (MRI), respectively. Therefore, both US and MRI are appropriate imaging methods for the diagnosis of CET. We evaluated the US and MRI features of the CET patient who presented to our hospital due to bilateral cervical swelling. In particular, based on the typical US appearance of thymic tissue, we believe that we can safely prevent the need for biopsy to detect that a discovered lesion that has ectopic thymus tissue. In this article, we aimed to emphasize the importance of imaging methods in the diagnosis of CET in a pediatric patient with a complaint of neck mass. [ABSTRACT FROM AUTHOR]

Ligamentum flavum cyst, a cystic lesion adjacent to the lumbar spine, is a rare cause of neurological symptoms and signs. It is usually seen in older ages. It is more common in the lower lumbar region than in the cervical region. Here, we aimed to discuss ligamentum flavum cysts in two cases. In a 54-year-old male, a lumbar magnetic resonance imaging showed a ligamentum flavum cyst located at the right posterolateral of the spinal canal at the L3-L4 level, and spinal canal stenosis at this level. After the surgical removal of the cyst, the patient's symptoms entirely resolved. A 43-year-old female patient had a ligamentum flavum cyst on the left posterolateral of the spinal at L4-L5 level with thecal sac compression. Conservative treatment was planned, and the symptoms regressed during follow-up. [ABSTRACT FROM AUTHOR]

Aim: Comparison of the diagnostic value of ultrasonography (US) and magnetic resonance imaging (MRI) in the diagnosis of rotator cuff and biceps tendon pathologies. Material and methods: Shoulder US an MRI were performed in patients suffering from shoulder pain. The results of the two methods were retrospectively evaluated in a total of 105 cases. Magnetic resonance imaging findins were accepted as a reference. Results: In the biceps tendon, ultrasonography served as a method for correct diagnosis in 7 of the 8 cases with dislocation, in 1 of 3 cases with partial rupture, and i all 4 cases with full thickness rupture. In biceps tendon patholo- gies, the sensitivity nad the specifity of US were respectively 80% and 978%. And for supraspinatus tendon pathologies; 24 of 26 full thickness ruptures (92.3% sensitivity, 98.8% specifity), 30 of 37 partial ruptures (81% sensitivity, 95.6% specifity), 30 of 37 tendnosis' (83.3% sensitivity, 95.6% speifity) were diagnosed correctly with US. Conslusion: As a result, US is a reliable and especially reproducible method for evaluation and diagnosing of patients with shoulder pain. Furthermore, its diagnostic value is low in partial rotator cuff ruptures and in the partial ruptures of the intracapsular biceps tendon [ABSTRACT FROM AUTHOR]