title: Magnetic resonance angiography of uterine artery: changes with embolization using gelatin sponge particles alone for fibroids.
abstract: OBJECTIVE
  To assess uterine artery recanalization, together with tumor devascularization, after embolization using gelatin sponge particles alone for fibroids.
  
  
  METHODS
  Twenty-seven patients underwent uterine artery embolization (UAE) for fibroids using only gelatin sponge particles. The angiographic endpoint of embolization was defined as near stasis of contrast medium in the ascending segment of the uterine artery. All patients underwent contrast-enhanced magnetic resonance angiography (MRA) before and 4 months after UAE, and contrast-enhanced magnetic resonance imaging (CE-MRI) before, 1 week after, and 4 months after UAE. The visualization of the uterine arteries before and 4 months after UAE was assessed using MRA. The infarction rates of the largest tumor were assessed using CE-MRI 1 week after UAE.
  
  
  RESULTS
  MRA 4 months after UAE showed 100% (53/53) of the descending and transverse segments, and 88% (43/49) of the ascending segments that had been noted on baseline MRA. The visualization of the ascending segments on MRA 4 months after UAE was identical to that on baseline MRA in 20 of 27 patients (74%). CE-MRI showed complete infarction of the largest tumor in 22 of 27 patients (81%), and 90-99% infarction of the largest tumor in the remaining 5 of 27 patients (19%).
  
  
  CONCLUSIONS
  Based on the MR study, in most cases uterine artery recanalization occurred, together with sufficient devascularization of fibroids, after UAE using gelatin sponge particles alone.
authors.affiliation: Department of Radiology, Saiseikai Shiga Hospital, Ohashi 2-4-1, Ritto, Shiga 520-3046, Japan. katsumo@eurus.dti.ne.jp
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Katsumori
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Kasahara
authors.forename: Yoko
authors.initials: Y
authors.lastname: Kin
authors.forename: Shigeo
authors.initials: S
authors.lastname: Ichihashi
mesh_terms: D000328:Adult; D004621:Embolization, Therapeutic; D005260:Female; D005500:Follow-Up Studies; D005781:Gelatin Sponge, Absorbable; D006801:Humans; D007889:Leiomyoma / Q000098:blood supply* / Q000628:therapy; D018810:Magnetic Resonance Angiography; D008875:Middle Aged; D014594:Uterine Neoplasms / Q000098:blood supply* / Q000628:therapy; D014599:Uterus / Q000098:blood supply*