title: Hemorrhagic Epidermoid Cyst in Cerebellar Vermis.
abstract: Intracranial epidermoid cysts are usually located in the paramedian regions with characteristic imaging features. Intracystic hemorrhage is rarely reported with most in the cerebellopontine angle area. We described a case of hemorrhagic epidermoid cyst in cerebellar vermis. The patient was a 21-year-old male presenting with a first episode of convulsive seizure attack as the initial and sole symptom. Head computed tomography showed a mass lesion in the cerebellar vermis with high density and nodular low density in the back of the lesion. Magnetic resonance imaging revealed most of the lesion was hypointense to isointense, extremely hypointensity on T1-, T2-weighted imaging respectively. The nodule was hyperintense on both T1- and T2-weighted images. The atypical clinical presentation, location and radiological features of intracranial epidermoid cyst make accurate diagnosis quite challenging. In such cases, scrutinized histopathological examination is necessary to exclude the malignancy that may need radio/chemotherapy.
authors.affiliation: West China Hospital, Sichuan University, Department of Neurosurgery,Chengdu, Sichuan, China.
authors.forename: Chuan-Yuan
authors.initials: CY
authors.lastname: Tao
authors.forename: Pan
authors.initials: P
authors.lastname: Wei
authors.forename: Jia-Jing
authors.initials: JJ
authors.lastname: Wang
authors.forename: Chao
authors.initials: C
authors.lastname: You
mesh_terms: D002526:Cerebellar Diseases / Q000150:complications / Q000473:pathology*; D065814:Cerebellar Vermis / Q000473:pathology*; D002543:Cerebral Hemorrhage / Q000209:etiology / Q000473:pathology; D004814:Epidermal Cyst / Q000150:complications / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D059906:Neuroimaging; D012640:Seizures / Q000209:etiology; D014057:Tomography, X-Ray Computed; D055815:Young Adult