Pemphigus vulgaris occurs when the immune system mistakenly attacks proteins in the upper layers of the skin.
People have severe blistering in the mouth and on other areas of the body, and sometimes sheets of skin peel off.
Doctors can diagnose pemphigus vulgaris by examining skin samples under a microscope.
Treatment usually involves corticosteroids or drugs that suppress the immune system.
Pemphigus develops most often in middle-aged or older people, affecting equal numbers of men and women. It rarely develops in children.
The body's immune system Overview of the Immune System The immune system is designed to defend the body against foreign or dangerous invaders. Such invaders include Microorganisms (commonly called germs, such as bacteria, viruses, and fungi) Parasites... read more makes special cells that protect the body against harmful foreign invaders such as bacteria and viruses. Some of these cells respond to invaders by producing proteins called antibodies. Antibodies Antibodies One of the body's lines of defense (immune system) involves white blood cells (leukocytes) that travel through the bloodstream and into tissues, searching for and attacking microorganisms and... read more target and attach to the invaders and attract other cells in the immune system to destroy them. In an autoimmune disorder Autoimmune Disorders An autoimmune disorder is a malfunction of the body's immune system that causes the body to attack its own tissues. What triggers autoimmune disorders is not known. Symptoms vary depending on... read more , the body's immune system mistakenly attacks the body’s own tissues—in this case, the skin. The antibodies produced by the immune system attack specific proteins that connect the epidermal cells (the cells in the top layer of skin) to each other. When these connections are disrupted, the cells separate from each other and from the lower layers of the skin, and blisters form. Similar-appearing blisters occur with a less dangerous skin disorder called bullous pemphigoid Bullous Pemphigoid Bullous pemphigoid is an autoimmune disease that causes blistering of the skin. Bullous pemphigoid is an autoimmune disorder that occurs when the immune system attacks the skin and causes blistering... read more .
(See also Overview of Blistering Disorders Overview of Blistering Disorders A blister (bulla, or, when small, a vesicle) is a bubble of fluid that forms beneath a thin layer of dead skin. The fluid is a mixture of water and proteins that oozes from injured tissue. Blisters... read more .)
The major symptom of pemphigus vulgaris is the development of clear, soft, and painful (sometimes tender) blisters of various sizes. In addition, the top layer of skin may detach from the lower layers in response to slight pinching or rubbing, causing it to peel off in sheets and to leave painful areas of open skin (erosions).
The blisters often first appear in the mouth and soon rupture, forming painful sores (ulcers). More blisters and ulcers may follow until the entire lining of the mouth is affected, causing difficulty swallowing, eating, and drinking. Blisters form in the throat as well.
Blisters can form on the skin and rupture, leaving raw, painful, crusted wounds. The person feels generally ill. Blisters may be widespread and, once ruptured, they may become infected. When severe, pemphigus vulgaris is as harmful as a serious burn. Similar to a burn, the damaged skin oozes large amounts of fluid and is prone to infection by many types of bacteria.
Doctors usually recognize pemphigus vulgaris by its characteristic blisters, but the disorder is diagnosed with certainty by examining a sample of skin under a microscope (skin biopsy Biopsy Doctors can identify many skin disorders simply by looking at the skin. A full skin examination includes examination of the scalp, nails, and mucous membranes. Sometimes the doctor uses a hand-held... read more ). Sometimes doctors use special chemical stains that allow antibody deposits to be seen under the microscope (called an immunofluorescence assay).
Doctors differentiate pemphigus vulgaris from bullous pemphigoid Bullous Pemphigoid Bullous pemphigoid is an autoimmune disease that causes blistering of the skin. Bullous pemphigoid is an autoimmune disorder that occurs when the immune system attacks the skin and causes blistering... read more by noting the layers of skin involved and the particular appearance of antibody deposits.
Without treatment, pemphigus vulgaris is often fatal, usually within 5 years. Treatment greatly improves survival, but the chance of dying is still about twice that of the general population. The risk of death and severe complications tends to be higher if people have widespread pemphigus vulgaris, require high doses of corticosteroids or other drugs that suppress the immune system to control the disorder, or have other serious disorders.
People who have moderate to severe disease are hospitalized. In the hospital, the raw skin surfaces require extraordinary care, similar to the care given to people with severe burns. Antibiotics may be needed to treat infections in ruptured blisters. Dressings can protect raw, oozing areas.
High doses of corticosteroids are the mainstay of treatment. They are taken by mouth (orally) or, if the person is hospitalized, may be given by vein (intravenously). If the disease is controlled, the dose of corticosteroids is gradually reduced (tapered). Sometimes rituximab, a drug that suppresses the immune system (immunosuppressant), is given with corticosteroids.
If the person does not respond to treatment or the disease flares up as the dose is tapered, an immunosuppressant, such as azathioprine, cyclophosphamide, methotrexate, mycophenolate mofetil, cyclosporine, or rituximab (if not already given), is also given. Immunosuppressants may also be given to reduce the need for corticosteroids in people who have needed corticosteroids for a long time or at high doses. Immune globulin given by vein is another treatment that can be used for severe pemphigus vulgaris. Some people respond well enough to discontinue drug therapy, whereas others must continue taking low doses of the drugs for long periods.
People with severe pemphigus vulgaris may also undergo plasma exchange Plasma exchange In apheresis, blood is removed from a person and then returned after substances are removed from it. Apheresis can be used to Obtain healthy blood components from a donor to transfuse to a person... read more , a process in which antibodies are filtered from the blood.
The following is an English-language resource that may be useful. Please note that THE MANUAL is not responsible for the content of this resource.
National Organization for Rare Disorders: Information about pemphigus, including links to resources and supporting organizations