RT Journal Article SR Electronic T1 Unusual Small Choroid Plexus Cyst Obstructing the Foramen of Monroe: Case Report JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 841 OP 843 VO 23 IS 5 A1 Radaideh, Majdi M. A1 Leeds, Norman E. A1 Kumar, Ashok J. A1 Bruner, Janet M. A1 Sawaya, Raymond YR 2002 UL http://www.ajnr.org/content/23/5/841.abstract AB Summary: This is a case report of unusual case of choroid plexus cyst at the right foramen of Monro in the anterior third ventricle that caused unilateral obstructive hydrocephalus. The value of small-FOV thin-section MR imaging in the diagnosis of small lesions of the foramen of Monroe is demonstrated. The immunohistochemical findings in choroid epithelial cysts in comparison with those of other types of cysts at this location are discussed.