Lichen sclerosus (LIKE-in skler-O-sus) is a chronic inflammatory skin disorder that can affect men, women, or children, but is most common in women. It usually affects the vulva (the outer genitalia or sex organ) and the anal area. While lichen sclerosus appears predominantly in postmenopausal women, this skin condition is also known to develop on the head of the penis in men. Occasionally, lichen sclerosus is seen on other parts of the body, especially the upper body, breasts, and upper arms.

The symptoms are the same in children and adults. Early in the disease, small subtle white spots appear. These areas are usually slightly shiny and smooth. As time goes on, the spots develop into bigger patches, and the skin surface becomes thinned and crinkled. As a result, the skin tears easily, and bright red or purple discoloration from bleeding inside the skin is common. More severe cases of lichen sclerosus produce scarring that may cause the inner lips of the vulva to shrink and disappear, the clitoris to become covered with scar tissue, and the opening of the vagina to narrow.

Lichen sclerosus of the penis occurs almost exclusively in uncircumcised men (those who have not had the foreskin removed). Affected foreskin can scar, tighten, and shrink over the head of the penis. Skin on other areas of the body affected by lichen sclerosus usually does not develop scarring.

HOW COMMON IS IT?

Although definitive data are not available, lichen sclerosus is considered a rare disorder that can develop in people of all ages. It usually appears in postmenopausal women and primarily affects the vulva. It is uncommon for women who have lichen sclerosus to have the disease on other skin surfaces. The disease is much less common in childhood. In boys, it is a major cause of tightening of the foreskin, which requires circumcision. Otherwise it is very uncommon in men.

WHAT ARE THE SYMPTOMS?

Symptoms vary depending on the area affected. Patients experience different degrees of discomfort. When lichen sclerosus occurs on parts of the body other than the genital area, most often there are no symptoms, other than itching. If the disease is severe, bleeding, tearing, and blistering caused by rubbing or bumping the skin can cause pain. Very mild lichen sclerosus of the genital area often causes no symptoms at all. If the disease worsens, itching is the most common symptom.

Rarely, lichen sclerosus of the vulva may cause extreme itching that interferes with sleep and daily activities. Rubbing or scratching to relieve the itching can create painful sores and bruising, so that many women must avoid sexual intercourse, tight clothing, tampons, riding bicycles, and other common activities that involve pressure or friction. Urination can be accompanied by burning or pain, and bleeding can occur, especially during intercourse.

When lichen sclerosus develops around the anus, the discomfort can lead to constipation that is difficult to relieve. This is particularly common in children. It is important to note that the signs of lichen sclerosus in children may sometimes be confused with those of sexual abuse. Most men with genital lichen sclerosus have not been circumcised. They sometimes experience difficulty pulling back the foreskin and have decreased sensation at the tip of the penis. Occasionally, erections are painful, and the urethra (the tube through which urine flows) can become narrow or obstructed.

WHAT CAUSES LICHEN SCLEROSUS?

The cause is unknown, although an overactive immune system may play a role. Some people may have a genetic tendency toward the disease, and studies suggest that abnormal hormone levels may also play a role. Lichen sclerosus has also been shown to appear at sites of previous injury or trauma where the skin has already experienced scarring or damage.

IS IT CONTAGIOUS?

No, lichen sclerosus is not contagious.

HOW IS IT DIAGNOSED?

Doctors can diagnose an advanced case by looking at the skin. However, early or mild disease often requires a biopsy (removal and examination of a small sample of affected skin). Because other diseases of the genitalia can look like lichen sclerosus, a biopsy is advised whenever the appearance of the skin is not typical of lichen sclerosus. -2-

HOW IS IT TREATED?

Patients with lichen sclerosus of nongenital skin often do not need treatment because the symptoms are very mild and usually go away over time. The amount of time involved varies from patient to patient. However, lichen sclerosus of the genital skin should be treated, even when it is not causing itching or pain, because it can lead to scarring that may narrow openings in the genital area and interfere with either urination or sexual intercourse or both. There is also a very small chance that skin cancer may develop within the affected areas.

In uncircumcised men, circumcision is the most widely used therapy for lichen sclerosus. This procedure removes the affected skin, and the disease usually does not recur. Prescription medications are required to treat vulvar lichen sclerosus, nongenital lichen sclerosus that is causing symptoms, and lichen sclerosus of the penis that is not cured by circumcision. The treatment of choice is an ultrapotent topical corticosteroid (a very strong cortisone cream or ointment). These creams or ointments may be applied daily for several weeks, which will be sufficient to stop and itching.

However, long-term but less frequent applications (sometimes as infrequently as twice a week) will be needed to keep the lesions from reactivating and to help restore the skin’s normal texture and strength. Treatment does not reverse the scarring that may have already occurred. Because prolonged use of ultrapotent corticosteroid creams and ointments can cause thinning and redness of the skin, give rise to “stretch marks” around the area of application, and predispose individuals to vulvar yeast infections, periodic follow up by a doctor is necessary.

Young girls may not require lifelong treatment, since lichen sclerosus can sometimes, but not always, disappear permanently at puberty. Scarring and changes in skin color, however, may remain even after the symptoms have disappeared. Ultrapotent topical corticosteroids are so effective that other therapies are rarely prescribed. The previous standard therapy was testosterone cream or ointment, but this has been proven to produce no more benefit than a placebo (inactive) cream.

Prolonged use of the testosterone cream or ointment can cause masculinization (low-pitched voice, increased coarse facial hairs). Another hormone cream, progesterone, was previously used to treat the disease, but has also been shown to be ineffective. Retinoids, or vitamin A-like medications, may be helpful for patients who cannot tolerate or are not helped by ultrapotent topical corticosteroids. Tacrolimus (Protopic*) ointment has been reported to benefit some patients, but more research is needed to confirm this.

Tacrolimus is a steroid-free ointment; it is not a corticosteroid. Tacrolimus has no apparent side effects other than local irritation in some patients. -3- There are some early indications that different forms of ultraviolet light treatments, with or without psoralens (pills that intensify the effect of ultraviolet A light), may be effective and well-tolerated treatments for some patients with lichen sclerosus on nongenital skin. Patients who need medication should ask their doctor how the medication works, what its side effects might be, and why it is the best treatment for their lichen sclerosus.

For women and girls, surgery to remove the affected skin is not an acceptable option because lichen sclerosus comes back after removal. Surgery may be useful for scarring, but only after lichen sclerosus is controlled with medication. Sometimes, people do not respond to the ultrapotent topical corticosteroid. Other factors, such as low estrogen levels, an infection, irritation, or allergy to the medication, can keep symptoms from clearing up. Your doctor may need to treat these as well. If you feel that you are not improving as you would expect, talk to your doctor.

CAN PEOPLE WITH LICHEN SCLEROSUS HAVE SEXUAL INTERCOURSE?

Women with severe lichen sclerosus may not be able to have sexual intercourse because of pain or scarring that narrows the entrance to the vagina. However, proper treatment with an ultrapotent topical corticosteroid can help restore normal sexual functioning, unless severe scarring has already narrowed the vaginal opening. In this case, surgery may be needed to correct the problem, but only after the disease has been controlled.

IS LICHEN SCLEROSUS RELATED TO CANCER?

Lichen sclerosus does not cause skin cancer. However, skin that is scarred by lichen sclerosus is more likely to develop skin cancer. The frequency of skin cancer in men with lichen sclerosus is not known. It is important for people who have the disease to receive proper treatment and to see the doctor every 6 to 12 months, so that the doctor can monitor and treat any changes that might signal skin cancer.

WHAT KIND OF DOCTOR TREATS LICHEN SCLEROSUS?

Lichen Sclerosus is treated by dermatologists (doctors who treat the skin) and by gynecologists if the female genitalia are involved.

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