H

This tumor is a disordered and purposeless overgrowth of modified sebaceous glands known as the hepatoid glands. These glands only occur in dogs. They are found in the skin around the anus, prepuce and dorsal tail and occasionally other areas of the skin. The tumor cells resemble liver (hepatic) cells. Most tumors are benign and can be permanently cured by total surgical removal. Many are multiple. Malignant hepatoid gland tumors tend to be locally invasive but very rarely spread to other parts of the body.