Posterior fossa ruptured dermoid cyst presenting with hydrocephalus

• Published in: Neurosciences (Riyadh, Saudi Arabia) Vol. 21; no. 4; pp. 358 - 360
• Main Authors: Wani, Abrar A, Raswan, Uday S, Malik, Nayil K, Ramzan, Altaf U
• Format: Journal Article
• Language: English
• Published: Saudi Arabia Saudi Medical Journal 01-10-2016; Riyadh : Armed Forces Hospital
• Subjects: Adult; Case Report; Dermoid Cyst - complications; Dermoid Cyst - diagnostic imaging; Humans; Hydrocephalus; Hydrocephalus - diagnostic imaging; Hydrocephalus - etiology; Hydrocephalus - surgery; Infratentorial Neoplasms - complications; Infratentorial Neoplasms - diagnostic imaging; Magnetic Resonance Imaging; Male; Rupture, Spontaneous - complications; Rupture, Spontaneous - diagnostic imaging; Tomography, X-Ray Computed; Ventriculoperitoneal Shunt
• ISSN: 1319-6138; 1319-6138
• DOI: 10.17712/nsj.2016.4.20160280

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.