title: Posterior fossa ruptured dermoid cyst presenting with hydrocephalus.
abstract: Dermoid cysts are rare, benign lesions of embryological origin that represent 0.1-0.7% of all intracranial tumors. They are mainly located in the supra tentorial space, especially in the parasellar region. Their location in the posterior fossa remains uncommon. Rupture of intracranial dermoid cysts is a rare phenomenon. We present a case of dermoid cyst, which had ruptured into ventricular system. Computed Tomography and MRI revealed fat in the fourth ventricle, prepontine cistern, and cerebellomedullary cistern. Hydrocephalus was noted. We performed right ventriculo-peritoneal shunt on which patient improved and he continues to remain asymptomatic one year after.
authors.affiliation: Department of Neurosurgery, Sher-i-Kashmir Institute of Medical Sciences, Soura, Srinagar, India. E-mail: drabrarahadwani@gmail.com.
authors.forename: Abrar A
authors.initials: AA
authors.lastname: Wani
authors.forename: Uday S
authors.initials: US
authors.lastname: Raswan
authors.forename: Nayil K
authors.initials: NK
authors.lastname: Malik
authors.forename: Altaf U
authors.initials: AU
authors.lastname: Ramzan
mesh_terms: D000328:Adult; D003884:Dermoid Cyst / Q000150:complications* / Q000000981:diagnostic imaging; D006801:Humans; D006849:Hydrocephalus / Q000000981:diagnostic imaging / Q000209:etiology* / Q000601:surgery; D015192:Infratentorial Neoplasms / Q000150:complications* / Q000000981:diagnostic imaging; D008279:Magnetic Resonance Imaging; D008297:Male; D012422:Rupture, Spontaneous / Q000150:complications / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed; D017287:Ventriculoperitoneal Shunt