Skip to content

Healthy Dogs

Font Size

Papillomas, Lipomas, Cysts, and Basal Cell Tumors in Dogs

Epidermal Inclusion Cysts (Sebaceous Cysts)

Epidermal inclusion cysts, also called sebaceous cysts, are common surface tumors found anywhere on the body. Kerry Blue Terriers, Schnauzers, Poodles, and spaniels are most often affected. Epidermal inclusion cysts begin when dry secretions block hair follicles, causing an accumulation of hair and sebum (a cheesy material), and the subsequent formation of a cyst.

These cysts produce a dome-shaped swelling up to an inch or more in size beneath the skin, though most are smaller. They can become infected and may need to be surgically drained. This sometimes leads to a cure.

Treatment: Surgical excision is the treatment of choice, although it is not always required.


A lipoma is a benign growth made up of mature fat cells interlaced with fibrous connective tissue. Lipomas are common in overweight dogs, especially females. A lipoma can be recognized by its oblong or round appearance and smooth, soft, fatlike consistency. Lipomas grow slowly and may get to be several inches in diameter. They are not painful. Rarely, what appears to be a lipoma is a malignant variant called a liposarcoma.

Treatment: Surgical removal is necessary if the lipoma is interfering with the dogs mobility, is growing rapidly, or is cosmetically bothersome. The tumor should be biopsied if there is any question about the diagnosis.


Histiocytomas are rapidly growing tumors found in dogs 1 to 3 years of age. They occur anywhere on the body. These benign tumors are dome-shaped, raised, hairless surface growths that are not painful. Because of their appearance, they are often called button tumors. These benign growths are more common on shorthaired dogs.

Treatment: Most histiocytomas disappear spontaneously within one to two months. Those that persist should be removed for diagnosis.

Today on WebMD

bulldog in party hat
Breeds with longevity
Doberman Pinscher Clipped Ears
The facts about ear cropping and tail docking.
dog with duck in mouth
Which are considered smartest?
boxer dog
What are their health issues?
Pit bull looking up
Pets: Is My Dog Normal
Dog scratching behind ear
dog catching frisbee

Love your pets, hate your allergies?

Get tips for relief.

Loading ...

Sending your email...

This feature is temporarily unavailable. Please try again later.


Now check your email account on your mobile phone to download your new app.

Dog Breed RMQ
Lady owner feeding dog
bulldog in party hat