title: Spontaneous resolution of post-delivery or post-abortion uterine artery pseudoaneurysm: A report of three cases.
abstract: Post-delivery/-abortion uterine artery pseudoaneurysm (UAP) sometimes causes life-threatening bleeding, requiring transarterial embolization (TAE). It is unclear whether some UAP resolve spontaneously. In three patients, UAP resolved spontaneously without TAE. Case 1 was after vacuum delivery with slight bleeding: at day 5 post-partum, a yin-yang sign on Color Doppler and an enhanced intrauterine sac-like structure were observed, leading to the diagnosis of UAP, which disappeared at 4 weeks post-partum. Case 2 was after vacuum delivery with manual placental removal and was asymptomatic: a hypoechoic intrauterine mass with a yin-yang sign were observed during a post-partum routine check-up and the intrauterine flow disappeared at 4 weeks post-partum. Case 3 was after dilatation and curettage in the first trimester with slight bleeding: UAP was detected at 4 weeks post-abortion, which disappeared at 6 weeks post-abortion. All three cases had a small UAP (diameter: 10-15 mm) and low-level or no symptoms. Some UAP may resolve spontaneously and, thus, may not require TAE.
authors.affiliation: Department of Obstetrics and Gynecology, Jichi Medical University, Tochigi, Japan.
authors.forename: Hironori
authors.initials: H
authors.lastname: Takahashi
authors.affiliation: Department of Obstetrics and Gynecology, Jichi Medical University, Tochigi, Japan.
authors.forename: Yosuke
authors.initials: Y
authors.lastname: Baba
authors.affiliation: Department of Obstetrics and Gynecology, Jichi Medical University, Tochigi, Japan.
authors.forename: Rie
authors.initials: R
authors.lastname: Usui
authors.affiliation: Department of Obstetrics and Gynecology, Jichi Medical University, Tochigi, Japan.
authors.forename: Akihide
authors.initials: A
authors.lastname: Ohkuchi
authors.affiliation: Department of Radiology, Jichi Medical University, Tochigi, Japan.
authors.forename: Shigeyoshi
authors.initials: S
authors.lastname: Kijima
authors.affiliation: Department of Obstetrics and Gynecology, Jichi Medical University, Tochigi, Japan.
authors.forename: Shigeki
authors.initials: S
authors.lastname: Matsubara
keywords: post-partum hemorrhage; pseudoaneurysm; transarterial embolization; uterine artery pseudoaneurysm; yin-yang sign