inverted papilloma which seems to afflict mostly young mature dogs. The lesions develop on the skin of the abdomen (at the bottom) and appear as raised nodules with a hard centre. Cats tend to ...

Inverted papilloma of urinary bladder is an uncommon urothelial neoplasm. Its relationship to urothelial carcinoma is controversial. Little is known of the genetic abnormalities of inverted papilloma.