title: Feline mammary adenocarcinoma: tumor size as a prognostic indicator.
abstract: Mammary carcinomas and adenocarcinomas (MACs) are relatively common tumors in cats. The postexcisional survival period of affected cats is inversely proportional to tumor size, but the reported median survival periods for different tumor size categories is quite variable. This variability diminishes the prognostic value of reported data. In our study, cats with MACs greater than 3 cm in diameter had a 12-month median survival period, whereas those with MACs less than 3 cm in diameter had a 21-month survival period. Survival periods for cats with MACs smaller than 3 cm ranged from 3 to 54 months; therefore, tumor size alone is of limited prognostic value in cats with MACs smaller than 3 cm in diameter. In cats with MACs larger than 3 cm in diameter, tumor size appears to have much higher prognostic relevance, because this study, as well as others, have indicated that cats with MACs greater than 3 cm in diameter have a poor prognosis, with median survival periods ranging from 4 to 12 months.
authors.affiliation: Department of Veterinary Pathology, Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, Saskatchewan S7N 5B4.
authors.forename: Jodi R
authors.initials: JR
authors.lastname: Viste
authors.forename: Sherry L
authors.initials: SL
authors.lastname: Myers
authors.forename: Baljit
authors.initials: B
authors.lastname: Singh
authors.forename: Elemir
authors.initials: E
authors.lastname: Simko
mesh_terms: D000230:Adenocarcinoma / Q000401:mortality / Q000473:pathology / Q000601:surgery / Q000662:veterinary*; D017677:Age Distribution; D000818:Animals; D002170:Canada / Q000453:epidemiology; D002371:Cat Diseases / Q000401:mortality* / Q000473:pathology / Q000601:surgery; D002415:Cats; D018572:Disease-Free Survival; D005260:Female; D008321:Mammary Glands, Animal; D015674:Mammary Neoplasms, Animal / Q000401:mortality* / Q000473:pathology / Q000601:surgery; D009364:Neoplasm Recurrence, Local / Q000401:mortality / Q000473:pathology; D011379:Prognosis; D016019:Survival Analysis; D013997:Time Factors