title: Uroperitoneum attributable to ruptured urachus in a yearling bull.
abstract: Ruptured urachus was found to result in uroperitoneum in a yearling Beefmaster bull. The uroperitoneum was initially believed to be attributable to ruptured bladder secondary to urolithiasis; however, catheter decompression of the bladder through an ischiatic urethrotomy did not resolve the uroperitoneum. The persistent urachus was diagnosed and removed through caudal right flank laparotomy with the bull standing. The urachus was attached to the umbilicus, communicated with the lumen of the bladder, and had a mucosal lining. Ruptured urachus is an unusual cause of uroperitoneum, but can cause clinical signs identical to those of ruptured bladder. Persistent urachus is a congenital abnormality in many species, but may be hereditary in Beefmaster cattle. In addition, the bull in this report developed hyperkalemia, which is considered an unusual finding in cattle with uroperitoneum.
authors.affiliation: Department of Large Animal Medicine, College of Veterinary Medicine, University of Georgia, Athens 30602.
authors.forename: G M
authors.initials: GM
authors.lastname: Baxter
authors.forename: D T
authors.initials: DT
authors.lastname: Zamos
authors.forename: P O
authors.initials: PO
authors.lastname: Mueller
mesh_terms: D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000209:etiology* / Q000601:surgery; D008297:Male; D012422:Rupture, Spontaneous; D014497:Urachus; D001745:Urinary Bladder Diseases / Q000150:complications / Q000601:surgery / Q000662:veterinary*