title: Ureteral mast cell tumor in a dog.
abstract: A 6-year-old, castrated male, mixed-breed dog was diagnosed with partial unilateral ureteral obstruction secondary to a ureteral mass. The ureteral mass was surgically resected, and an ureteroneocystostomy was performed. Histopathology of the ureteral mass was consistent with a poorly differentiated mast cell tumor (MCT). The patient recovered well but was euthanized 5 months postoperatively for central nervous system signs. A choroid plexus tumor was diagnosed during necropsy examination. There was no evidence of recurrence or dissemination of the ureteral MCT. Extracutaneous MCTs are rare in dogs, and primary MCT associated with the urinary tract has not previously been reported in the veterinary literature.
authors.affiliation: Departments of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York 14853, USA.
authors.forename: Michele
authors.initials: M
authors.lastname: Steffey
authors.forename: Kenneth M
authors.initials: KM
authors.lastname: Rassnick
authors.forename: Brian
authors.initials: B
authors.lastname: Porter
authors.forename: Bradley L
authors.initials: BL
authors.lastname: Njaa
mesh_terms: D000818:Animals; D003559:Cystostomy / Q000379:methods / Q000662:veterinary; D004283:Dog Diseases / Q000473:pathology / Q000601:surgery*; D004285:Dogs; D008297:Male; D012515:Mast-Cell Sarcoma / Q000473:pathology / Q000601:surgery / Q000662:veterinary*; D016896:Treatment Outcome; D014516:Ureteral Neoplasms / Q000473:pathology / Q000601:surgery / Q000662:veterinary*; D014517:Ureteral Obstruction / Q000473:pathology / Q000601:surgery / Q000662:veterinary*; D014519:Ureterostomy / Q000379:methods / Q000662:veterinary