title: Hemorrhagic Colloid Cyst Presenting with Acute Hydrocephaly.
abstract: Colloid cysts are benign slow-growing cystic lesions located on the roof of the third ventricle that usually present with symptoms related to gradual rise of intracranial pressure. They mostly remain asymptomatic and sometimes grow progressively and cause diverse symptoms associated with increased intracranial pressure such as headache, diplopia, and sixth cranial nerve palsy. Here we report a 47-year-old female who presented to the emergency department with acute severe headache and nausea/vomiting. On MRI examination acute hydrocephaly due to hemorrhagic colloid cyst was detected. Acute hemorrhage in colloid cysts is extremely rare and may present with symptoms of acute increase in the intracranial pressure. Intracystic hemorrhage is very rarely reported as a complication of colloid cyst presenting with paroxysmal symptoms of acute hydrocephaly.
authors.affiliation: Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Reza
authors.initials: R
authors.lastname: Akhavan
authors.affiliation: Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Behrouz
authors.initials: B
authors.lastname: Zandi
authors.affiliation: Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Masoud
authors.initials: M
authors.lastname: Pezeshki-Rad
authors.affiliation: Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Donya
authors.initials: D
authors.lastname: Farrokh
authors.affiliation: Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Bita
authors.identifier: 0000-0001-9162-2312
authors.initials: B
authors.lastname: Abbasi