Dog Owner's Home Veterinary Handbook.pdf - Mr. Walnuts

EPIDERMAL INCLUSION CYSTS (SEBACEOUS CYSTS)
TUMORS AND CANCERS • 531
Abscessed epidermal
inclusion cysts such as
this one are frequently
mistaken for tumors.
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.
LIPOMAS
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 dog ’ s mobility, is growing rapidly, or is cosmetically bothersome. The
tumor should be biopsied if there is any question about the diagnosis.