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Pilonidal Disease
What is Pilonidal Disease and What Causes It?
Pilonidal disease is a chronic infection of the skin in the region
of the buttock crease. The condition results from a reaction to hairs
embedded in the skin, commonly occurring in the cleft between the
buttocks. The disease is more common in men than women and frequently
occurs between puberty and age 40. It is also common in obese people
and those with thick, stiff body hair.
What are the Symptoms?
Symptoms vary from a small dimple to a large mass. Often the area
will drain fluid that may be clear, cloudy, or bloody. With infection,
the area becomes red, tender, and the drainage (pus) will have a foul
odor. The infection may also cause fever, malaise, or nausea.
There are several common patterns of this disease. Nearly all patients
have an episode of an acute abscess (the area is swollen, tender,
and may drain pus). After the abscess resolves, either by itself or
with medical assistance, many patients develop a pilonidal sinus.
The sinus is a cavity below the skin surface that connects to the
surface with one or more small openings or tracts. Although a few
of these sinus tracts may resolve without therapy, most patients need
a small operation to eliminate them.
A small number of patients develop recurrent infections and inflammation
of these sinus tracts. The chronic disease causes episodes of swelling,
pain, and drainage. Surgery is almost always required to resolve this
condition.
How is Pilonidal Disease Treated?
The treatment depends on the disease pattern. An acute abscess is
managed with an incision and drained to release the pus, and reduce
the inflammation and pain. This procedure usually can be performed
in the office with local anesthesia. A chronic sinus usually will
need to be excised or surgically opened.
Complex or recurrent disease must be treated surgically. Procedures
vary from unroofing the sinuses to excision and possible closure with
flaps. Larger operations require longer healing times. If the wound
is left open, it will require dressing or packing to keep it clean.
Although it may take several weeks to heal, the success rate with
open wounds is higher. Closure with flaps is a bigger operation that
has a higher chance of infection; however, it may be required in some
patients. We will discuss these options with you and help you select
the appropriate operation.
What Care is Required After Surgery?
If the wound can be closed, it will need to be kept clean and dry
until the skin is completely healed. If the wound must be left open,
dressings or packing will be needed to help remove secretions and
to allow the wound to heal from the bottom up.
After healing the skin in the buttocks crease must be kept clean and
free of hair. This is accomplished by shaving or using a hair removal
agent every two or three weeks until age 30. After age 30, the hair
shaft thins, becomes softer, and the buttock cleft becomes less deep.
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