title: Chorioangioma: antenatal diagnosis with fast MR imaging.
abstract: We report a case of chorioangioma of the placenta, in which fast magnetic resonance imaging (MRI) was useful adjunct to ultrasonography for the antenatal diagnosis. MRI allowed clear demonstration of 6.8 x 6.0 cm solid placental mass along with hydramnios and anatomically normal fetus. On T(1)-weighted breath-hold spoiled gradient-echo (fast low-angle shot [FLASH]) images, chorioangioma was mostly isointense to the placenta, but had an area of high signal intensity near the base and at the periphery, suggestive of hemorrhage. On T(2)-weighted half-Fourier single-shot fast spin echo (HASTE) images, the mass showed heterogeneous high signal intensity, but had an area of low signal intensity near the surface.
authors.affiliation: Department of Radiology, Saitama Medical School, 38 Morohongo Moroyama Iruma-gun, 350-0495, Saitama, Japan. satomik@wonder.ocn.ne.jp
authors.forename: S
authors.initials: S
authors.lastname: Kawamotoa
authors.forename: F
authors.initials: F
authors.lastname: Ogawa
authors.forename: J
authors.initials: J
authors.lastname: Tanaka
authors.forename: S
authors.initials: S
authors.lastname: Ban
authors.forename: A
authors.initials: A
authors.lastname: Heshiki
mesh_terms: D000328:Adult; D002585:Cesarean Section; D005260:Female; D005333:Fetus / Q000473:pathology; D005500:Follow-Up Studies; D005865:Gestational Age; D006391:Hemangioma / Q000175:diagnosis*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D010920:Placenta / Q000473:pathology; D010922:Placenta Diseases / Q000175:diagnosis*; D011247:Pregnancy; D011252:Pregnancy Complications, Neoplastic / Q000175:diagnosis*; D011256:Pregnancy Outcome; D011296:Prenatal Diagnosis / Q000379:methods*