Ninety percent of all mammary tumors in cats are invasive tubular adenocarcinomas, and all should be considered behaviorally malignant. The most important prognostic variable is the size of the tumor. Cats with mammary malignancies less than 1 cm in diameter have a 4.5 year median post-operative survival, while those with tumors greater than 3 cm in diameter at the time of excision have only a 6 month median survival. I see no histologic difference between the large and small tumors, so I conclude that the key to success is early detection and wide excision. In contrast to the situation in bitches, there is no evidence that ovariohysterectomy exerts any influence over the prevalence of neoplasia in queens.
Some people use the arrival of birds or the sprouting of bulbs as signals that spring is coming.
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