title: Carcinoma in the urinary bladder of a cat: cytologic findings and a review of the literature.
abstract: Percutaneous fine needle aspiration biopsy (FNAB) was used to diagnose a urinary bladder carcinoma in an aged cat. The cytologic appearance of specimens collected initially was similar to that reported for canine transitional cell carcinoma. However, impression smears of the tumor made at necropsy 7 weeks later consisted predominantly of atypical squamous epithelial cells compatible with squamous cell carcinoma. Histologically, the malignancy was noted to have intermixed areas of abnormal squamous and transitional cell proliferation. The neoplasia was interpreted as a transitional cell carcinoma with extensive transformation to squamous cell carcinoma. This report examines the use and limitations of FNAB in the diagnosis of feline urinary bladder carcinoma and the incidence and behavior of these tumors in the cat.
authors.affiliation: Department of Veterinary Pathology, College of Veterinary Medicine, Oklahoma State University, Stillwater, OK 74078.
authors.forename: Dana B.
authors.initials: DB
authors.lastname: Walker
authors.forename: Rick L.
authors.initials: RL
authors.lastname: Cowell
authors.forename: Kenneth D.
authors.initials: KD
authors.lastname: Clinkenbeard
authors.forename: John
authors.initials: J
authors.lastname: Turgai