Arachnoid cysts are rare lesions occurring anywhere in the cerebrospinal axis. The sylvian fissure remains the most favoured site for their occurrence, followed by cerebellopontine angle, suprasellar, and quadrigeminal cisterns. Retroclival arachnoid cysts are very rare. We report a retroclival arachnoid cyst with bilateral cerebellopontine angle extensions with hemifacial spasm in a 26-year-ol...

deficits. There was no history of head injury or surgery. Plain radiographs of skull showed irregular calcifications in the left temporal region (Figure 1). Computed tomography (CT) of brain revealed a heterogeneous extra axial lesion in the anterior aspect of left temporal fossa and left middle cerebral artery cistern, showing calcification, soft tissue and fat density. Multiple tiny fat dropl...

Two patients with large bilateral subdural haematomas with patterns of non-enhanced brain computed tomography (CT) falsely suggesting coexistent subarachnoid haemorrhage are presented. The CT images showed marked effacement of the basal cisterns with hyperdense signal along the tentorium, sylvian fissure, and the perimesencephalic cisterns. In both cases, the suspicion of subarachnoid haemorrha...

BACKGROUND AND PURPOSE Analysis of specific features in the brain of patients with holoprosencephaly (HPE) may clarify normal and abnormal brain development and help predict outcomes for specific children. We assessed sulcal and gyral patterns of cerebral cortex in patients with HPE and developed a method of grading brain development. METHODS Neuroimaging studies (75 MR imaging, 21 CT) of 96 ...