title: The choroid plexus pseudocyst: sonographic identification and characterization.
abstract: Amniocentesis has been advocated by some authors when fetal choroid plexus cysts are discovered, because of their reported association with karyotype abnormalities. We have noted an oval hypoechoic structure projecting into the adjacent choroid plexus, which simulates a cyst when imaged across its short axis, in 39 of 50 consecutive fetuses. This presumably normal structure or pseudocyst may represent the corpus striatum. Knowledge of its existence and benign nature will help avoid diagnostic errors and unnecessary amniocenteses.
authors.affiliation: Department of Radiology, University of California, San Francisco 94143-0628.
authors.forename: N L
authors.initials: NL
authors.lastname: Nelson
authors.forename: P W
authors.initials: PW
authors.lastname: Callen
authors.forename: R A
authors.initials: RA
authors.lastname: Filly
mesh_terms: D000649:Amniocentesis; D001927:Brain Diseases / Q000000981:diagnostic imaging / Q000453:epidemiology; D002831:Choroid Plexus / Q000000981:diagnostic imaging* / Q000196:embryology; D003342:Corpus Striatum / Q000000981:diagnostic imaging; D003560:Cysts / Q000000981:diagnostic imaging* / Q000453:epidemiology; D005260:Female; D005315:Fetal Diseases / Q000000981:diagnostic imaging* / Q000453:epidemiology; D006801:Humans; D011247:Pregnancy; D011446:Prospective Studies; D016216:Ultrasonography, Prenatal