Priapism after castration in a cat.

Priapism developed in a cat 2 days after castration and strangury. The priapism was unresponsive to massage and antimicrobial treatment. Because of penile engorgement and necrosis, a perineal urethrostomy was performed. Clinical signs of priapism resolved after urethrostomy. Histologic examination of tissues revealed vascular stasis within the corpus cavernosum penis and funiculitis of the right spermatic cord.