title: A subamniotic hematoma resembling a deflated balloon.
abstract: Subamniotic hematoma is a placental pathological lesion resulting from the rupture of allantochorionic vessels. Some of them decrease in size during pregnancy. However, the relation between the reduction of the lesions during pregnancy and the structure of the placenta at delivery has not been previously reported. We report a case of subamniotic hematoma detected prenatally, which decreased in size during the third trimester, and presented with a cystic structure resembling a deflated balloon at delivery, and also review the literature of the placental surface cysts detected by prenatal ultrasound.
authors.affiliation: Department of Obstetrics and Gynecology, University of Fukui, Matsuoka-Cho, Yoshida-Gun, Fukui, 910-1193, Japan.
authors.forename: Ken-ichi
authors.initials: K
authors.lastname: Shukunami
authors.forename: Makoto
authors.initials: M
authors.lastname: Orisaka
authors.forename: Sanae
authors.initials: S
authors.lastname: Orisaka
authors.forename: Koji
authors.initials: K
authors.lastname: Nishijima
authors.forename: Kimihisa
authors.initials: K
authors.lastname: Tajima
authors.forename: Kenji
authors.initials: K
authors.lastname: Goto
authors.forename: Fumikazu
authors.initials: F
authors.lastname: Kotsuji
mesh_terms: D000328:Adult; D000650:Amnion / Q000473:pathology*; D005260:Female; D006406:Hematoma / Q000000981:diagnostic imaging; D006801:Humans; D010922:Placenta Diseases / Q000175:diagnosis; D011247:Pregnancy; D011249:Pregnancy Complications, Cardiovascular / Q000000981:diagnostic imaging; D016216:Ultrasonography, Prenatal