[Fourth ventricule epidermoid cyst: about a case].

Epidermoid cysts are rare benign tumors developed by ectodermic inclusions. They are usually located at the level of the pontocerebellar angle, the parasellar region and the temporal fossa. They exceptionally develop at the level of the fourth ventricle We report the case of a 47-year old woman admitted for intracranial hypertension syndrome associated with walking disorders. The diagnosis of fourth ventricle epidermoid cyst was evoked based on diffusion MRI data then confirmed intraoperatively and by histologic examination. Subtotal surgical excision was performed due to capsule adhesion to the upper part of the V4 floor. After a 36-month follow-up, the patient showed no signs of tumor recurrence.