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  • Title: [Epidermoid cyst of the cisterna magna and the fourth ventricle: Report of four cases].
    Author: Hossini A, Lakhdar F, Gana R, Maaqili MR, Saïdi A, Jiddane M, Bellakhdar F.
    Journal: Neurochirurgie; 2012 Dec; 58(6):358-63. PubMed ID: 22704404.
    Abstract:
    INTRODUCTION: Epidermoid cyst is a congenital and benign tumor, developed from ectodermal inclusion. These cysts occur very rarely in the cisterna magna and the fourth ventricle. OBJECTIVE: To report four cases of epidermoid cyst of the cisterna magna and the fourth ventricle in the light of the data of literature. PATIENTS AND METHODS: We report a retrospective study of four cases of epidermoid cysts of the cisterna magna and the fourth ventricle. The data was collected from January 2000 to December 2006 from to series of 18 cases of epidermoid cysts of posterior cranial fossa (14 cases were localised at the cerebellopontine angle). All the patients had a physical examination and a complete neuroradiological imagery. The treatment was surgical. The follow-up was at least 9 months. RESULTS: There were two men and two women. The mean age was 47.75 years. All patients presented with cerebellar syndrome. Three patients had intracranial hypertension. Neuroradiological explorations showed a cystic lesion developed in the cisterna magna in two cases, in the fourth ventricle in one case and in the two locations in one case. Two patients had hydrocephalus. All patients had surgery with a posterior approach and one patient had first ventriculoperitoneal shunt. The diagnosis was confirmed by histological examination. Postoperatory outcome was favourable in all cases. One patient developed bilateral chronic subdural hematoma, which was surgically removed. A long time follow-up was good in all cases. CONCLUSION: Epidermoid cysts are characterized by a long evolution. The diagnosis is relatively characteristic in the imagery. The prognosis was favourable with a complete surgical resection.
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