Brainstem dermoid cyst rupture with hydrocephalus in a child.

Intracranial dermoid cysts are ectodermal lesions of embryological origin. They are of slow progression and symptoms associated with unruptured cysts are most commonly due to mass effect. However, a potential rupture in the ventricular system is rare and can cause meningitis, seizures and hydrocephalus. Hereby, we report a case of a 12-year-old boy presenting with obstructive hydrocephalus due to brainstem dermoid cyst rupture.