Epidemiology and risk factors for mammary tumors in female cats
This study aimed to estimate the incidence and risk factors for mammary tumors in female cats attending UK primary-care practices. The study hypothesized that middle-aged, intact and certain breeds are associated with increased mammary tumor risk.
A case-control study design identified mammary tumor cases by assessment of electronic patient records, nested within a denominator population of 259,869 female cats attending 886 primary-care VetCompass practices in the UK in 2016.
Results showed that from 2,858 potential mammary tumor cases identified within the denominator, 270 cats met the case definition, giving an incidence risk of 104 per 100,000 (0.104%, 95% confidence interval 0.092 to 0.117%) during 2016.
In the risk factor analysis of increasing age, purebred compared to crossbred and veterinary group were associated with increased odds of mammary tumor. Median survival after the diagnosis of mammary tumor cats was 18.7 months.
In conclusion, the current study provides an updated estimate of the incidence of mammary cancer in cats seen in primary care veterinary practice in the UK with increasing risk seen in older cats and with purebred status. This study can aid veterinary surgeons to identify cats at greater risk of mammary tumor and advise on survival after diagnosis.
P Pickard Price et al. “Epidemiology and risk factors for mammary tumours in female cats.” J Small Anim Pract. 3 April 2023. doi: 10.1111/jsap.13598.
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