title: Giant, calcified colloid cyst of the lateral ventricle.
abstract: We report a patient with a giant, calcified colloid cyst in the left lateral ventricle. Colloid cysts are slow growing, benign lesions, commonly originating in the roof of the anterior third ventricle near the foramen of Monro. Many colloid cysts are small lesions which are either discovered incidentally or cause headache, visual changes, memory deficits, and/or syncope. Giant colloid cysts are rare. A 40-year-old man presented with a month long history of worsening headaches and was found to have a multiloculated 5 cm intraventricular mass with an anterior hyperdensity, suggestive of calcification, arising within the lateral ventricles. He underwent an interhemispheric transcallosal approach for resection of the mass. The pathology was consistent with a giant colloid cyst with calcification in the anterior cyst wall. Giant, calcified mass is a rare presentation of colloid cyst. Although rare, this diagnosis remains an important consideration in the differential diagnosis of any calcified, cystic intraventricular mass.
authors.affiliation: Department of Neurosurgery, Keck School of Medicine, University of Southern California, Suite 5046, 1200 North State Street, Los Angeles, CA 90089, USA.
authors.forename: Aimee
authors.initials: A
authors.lastname: Two
authors.affiliation: Department of Neurosurgery, Keck School of Medicine, University of Southern California, Suite 5046, 1200 North State Street, Los Angeles, CA 90089, USA. Electronic address: echristi@usc.edu.
authors.forename: Eisha
authors.initials: E
authors.lastname: Christian
authors.affiliation: Department of Pathology, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA.
authors.forename: Anna
authors.initials: A
authors.lastname: Mathew
authors.affiliation: Department of Neurosurgery, Keck School of Medicine, University of Southern California, Suite 5046, 1200 North State Street, Los Angeles, CA 90089, USA.
authors.forename: Steven
authors.initials: S
authors.lastname: Giannotta
authors.affiliation: Department of Neurosurgery, Keck School of Medicine, University of Southern California, Suite 5046, 1200 North State Street, Los Angeles, CA 90089, USA.
authors.forename: Gabriel
authors.initials: G
authors.lastname: Zada
mesh_terms: D000328:Adult; D002114:Calcinosis / Q000473:pathology; D002551:Cerebral Ventricle Neoplasms / Q000473:pathology*; D056364:Colloid Cysts / Q000473:pathology*; D003937:Diagnosis, Differential; D006801:Humans; D020547:Lateral Ventricles / Q000473:pathology*; D008297:Male
keywords: Calcified ventricular mass; Colloid cyst; Foramen of Monro; Hydrocephalus; Lateral ventricle