Perianal adenoma tumors in dogs

Written by tracy hodge | 13/05/2017
Perianal adenoma tumors in dogs
Perianal adenoma tumours are most common in older dogs. (Old friend image by Pushpangadan from

A perianal adeoma tumour may occur in dogs and although it is rare, may require treatment due to its aggressive nature. Early diagnosis and treatment are the key to successful treatment of a perianal adenoma tumour in dogs.


Perianal adenoma tumours in dogs most commonly occur in older dogs (over 10.5 years). This tumour may affect males and females equally, although intact (not neutered) male dogs may be less likely to suffer from this type of tumour. Some breeds of dogs have a genetic predisposition to perianal adenoma tumours. These include the German shepherd, Cocker spaniel, dachshund, Springer spaniel and the Alaskan malamute.


The symptoms associated with perianal adenoma tumours may include constipation, tenesmus (feeling a need to defecate), excessive licking of the perianal area (around the anus) and scooting across the floor on the perianal area. You may notice the swelling in the perianal area, as well as the dog's discomfort in this area.


A veterinarian may diagnose a perianal adenoma tumour with a rectal examination. The veterinarian may palpate (feel) the tumour, as well as enlarged lymph nodes in the area. An abdominal ultrasound may also reveal tumours that may be too small to palpate.


A complication often accompanies perianal adenoma tumours in dogs is hypercalcemia. Hypercalcemia is the presence of too much calcium in the body and is caused by the secretion by the tumour of parathyroid-hormone related protein. According to DVM 360, hypercalcemia occurs in approximately 26 to 53 per cent of perianal adenoma tumours in dogs.


Perianal adenoma tumours may require a multi-dimensional treatment plan, because they are highly aggressive and tend to spread rapidly. This treatment plan usually includes surgery to remove the tumour if possible, followed by chemotherapy and radiation.

By using the site, you consent to the use of cookies. For more information, please see our Cookie policy.