Junctional epidermolysis bullosa

Junctional epidermolysis bullosa (JEB) is a rare genetic disorder that affects the skin and mucous membranes. It is characterized by blister formation within the lamina lucida of the basement membrane zone.

Signs and Symptoms

The primary symptom of JEB is the formation of blisters on the skin and mucous membranes. These blisters can be caused by minor trauma or friction, such as rubbing or scratching. Other symptoms can include hair loss, dental problems, difficulty swallowing, and respiratory problems.

Causes

JEB is caused by mutations in the genes that encode for the proteins laminin-332 and type XVII collagen. These proteins are essential for the proper formation and functioning of the skin and mucous membranes. Without these proteins, the skin and mucous membranes are more susceptible to damage and blister formation.

Diagnosis

The diagnosis of JEB is typically made based on the clinical presentation of the patient, including the presence of blisters on the skin and mucous membranes. Genetic testing can confirm the diagnosis and identify the specific gene mutation causing the disease.

Treatment

There is currently no cure for JEB. Treatment is focused on managing the symptoms and preventing complications. This can include wound care, pain management, nutritional support, and in some cases, surgical intervention.

Prognosis

The prognosis for individuals with JEB varies depending on the severity of the disease. Some forms of JEB are lethal in infancy, while others are associated with a normal lifespan but significant morbidity.

See Also

• Epidermolysis bullosa
• Genetic disorder
• Skin disease