[Feline fibro-epithelial hyperplasia in 3 castrated tomcats following treatment with progestagens]

This article describes three castrated tomcats that were treated with progestins. All three developed symptoms of fibroepithelial hyperplasia of the mammary gland, probably as a consequence of this treatment. This disease is commonly found in intact young female cats, pregnant cats, and progestin treated cats. Therapeutical consequences are dealt with and the importance of (histo)pathological investigation to 'Good Veterinary Practice' is pointed out.