title: Unruptured interstitial pregnancy: a pitfall of MR imaging.
abstract: We report two cases with interstitial pregnancy, which showed completely different MR appearances. In case 1, a gestational sac was demonstrated and the diagnosis of ectopic pregnancy was straightforward. In case 2, a hypervascular mass was shown without demonstration of a gestational sac, the findings usually seen in gestational trophoblastic disease (GTD). MR imaging may play some role in the diagnosis of interstitial pregnancy when sonography is insufficient or equivocal. If GS is visualized, diagnosis is easy. However, if not, the appearance may have a spectrum and can be similar to GTD.
authors.affiliation: Department of Radiology, Kumamoto University School of Medicine, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Yamashita
authors.forename: M
authors.initials: M
authors.lastname: Harada
authors.forename: M
authors.initials: M
authors.lastname: Torashima
authors.forename: M
authors.initials: M
authors.lastname: Takahashi
authors.forename: H
authors.initials: H
authors.lastname: Tashiro
authors.forename: M
authors.initials: M
authors.lastname: Matsui
authors.forename: K
authors.initials: K
authors.lastname: Miyazaki
authors.forename: H
authors.initials: H
authors.lastname: Okamura
mesh_terms: D000328:Adult; D000650:Amnion / Q000473:pathology; D002823:Chorion / Q000473:pathology; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D011247:Pregnancy; D011274:Pregnancy, Tubal / Q000175:diagnosis* / Q000000981:diagnostic imaging; D014328:Trophoblastic Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging; D014463:Ultrasonography; D014594:Uterine Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging