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. 2002 Jan;43(1):33-7.

Feline mammary adenocarcinoma: tumor size as a prognostic indicator

Jodi R Viste  1 , Sherry L Myers, Baljit Singh, Elemir Simko
Affiliations

Feline mammary adenocarcinoma: tumor size as a prognostic indicator

Jodi R Viste et al. Can Vet J. 2002 Jan.

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.

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Figures

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Figure 1. Age distribution of 37 cats at first detection of mammary adenocarcinoma.
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Figure 2.
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Figure 3. Correlation between survival and diameter of excised mammary adenocarcinomas in 18/37 cats with follow-up information (r2 = 0.0038; P = 0.808; == median survival of size category).
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Figure 4. Kaplan-Meier curves and their calculated linear slopes of survival period for 18/37 cats subgrouped by diameter of excised mammary adenocarcinomas (P = 0.0706).
See this image and copyright information in PMC

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