Adobe Animal Hospital

7712 E. Indian School Rd
Scottsdale, AZ 85251



The anal sacs are located on either side of the anus just under theskin at the and positions. They connect to the anus by means of smallcanals called ducts. Anal sacs produce and store a dark, foul-smellingfluid. These are the same types of organs that a skunk has to scareaway its enemies and mark territory. Although cats use their anal sacsfor the same purpose, most domestic cats have no need to markterritory or repel predators. Because the sacs are rarely emptied, thefluid builds up, solidifies, and becomes an ideal environment for bacteriato thrive.

What diseases occur in the anal sacs?
There are three diseases that occur in the anal sacs.
1. When the fluid becomes thick and solidified, the condition is called impaction. 
2. When bacteria grow in this material producing yellow or bloody pus, the condition is called infection. 
3. When the infection builds to create a hot, tender swelling in the gland, the condition is called an abscess. When the abscessed material overflows the sac or the duct leading to the sac becomes obstructed, the skin over the sac breaks open, and the pus drains onto the skin.

What are the clinical signs?
Symptoms of anal sac disease are:
1. Scooting or dragging the anal area.
2. Excessive licking under the tail.
3. Pain, sometimes severe, near the tail or anus.
4. A swollen area on either side of the anus.
5. Bloody or sticky drainage on either side of the anus.

How are these diseases treated? 
The treatment for impaction is to express the sacs and clean out the solidified material. For infection, the sacs must be expressed and antibiotics administered to kill the bacteria. If the sacs abscess, the abscess must be surgically drained and antibiotics administered.

How likely is it for anal sac disease to occur again?
 It is not very common for cats to have recurrent anal sac disease. However,some overweight cats will have chronic anal sac problems. The anal sacs ofobese cats do not drain well, thus these cats are predisposed to recurrentproblems. If a cat has several episodes of anal sac disease, the anal sacs canbe removed surgically. Because these sacs are virtually unused, there is noloss to the cat. It is the only way to permanently cure the problem.

Are there any common surgical complications?
Surgery requires general anesthesia which always carries some degree of risk,whether the patient is a cat or a person. However, modern anesthetics makethis risk minimal for cats that are otherwise healthy.Some cats will experience lack of bowel control after the surgery. They may drop fecal balls as they walk. This occurs because the nerves that control the anus are near the anal sacs and may be damaged during surgery. However, this is almost always a temporary problem that will resolve a few days to a few weeks after surgery.

Can anything else happen to anal sacs?
Some cats are born with anal canals that do not close well. These cats are constantly draining anal sac fluid and leaving a foul-smelling drop wherever they have been. This is another indication for anal sac removal. There does not appear to be any other way to stop this, and these cats do not outgrow this problem.