title: Bilateral segmental aplasia with unilateral uterine horn torsion in a Pomeranian bitch.
abstract: Bilateral segmental aplasia of the uterine horns with unilateral pyometra and uterine horn torsion were diagnosed in a Pomeranian bitch that presented with chronic abdominal distension and an acute onset of anorexia and lethargy. Because radiographic and ultrasonographic findings revealed the presence of markedly enlarged bilateral uterine horns filled with fluid in the caudal abdomen, a tentative diagnosis of either pyometra or hydrometra with uterine horn torsion was made. Exploratory laparotomy showed bilateral, segmentally distended uterine horns with unilateral uterine horn torsion. Ovariohysterectomy was performed, and bilateral segmental aplasia of the uterine horns with the development of unilateral uterine horn torsion was diagnosed histopathologically. To the authors' knowledge, this is the first report of uterine horn torsion in conjunction with segmental aplasia of the uterine horn in a bitch.
authors: Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine,  Hokkaido University, Sapporo, Japan.
authors: Kensuke
authors: K
authors: Nakamura
authors: Masahiro
authors: M
authors: Yamasaki
authors: Tomohiro
authors: T
authors: Osaki
authors: Hiroshi
authors: H
authors: Ohta
authors: Noboru
authors: N
authors: Sasaki
authors: Keisuke
authors: K
authors: Aoshima
authors: Takashi
authors: T
authors: Kimura
authors: Mitsuyoshi
authors: M
authors: Takiguchi
mesh_terms: D000818:Animals; D004283:Dog Diseases / Q000175:diagnosis* / Q000601:surgery; D004285:Dogs; D005260:Female; D007044:Hysterectomy / Q000662:veterinary; D010052:Ovariectomy / Q000662:veterinary; D014102:Torsion Abnormality / Q000175:diagnosis / Q000601:surgery / Q000662:veterinary*; D014591:Uterine Diseases / Q000175:diagnosis / Q000601:surgery / Q000662:veterinary*