Pemphigus

Pemphigus is a rare autoimmune disease characterized by the formation of blisters on the skin and mucous membranes. This is caused by a violation of the body's immune response, in which antibodies begin to attack the proteins responsible for the adhesion of epidermal cells. As a result of this process, acantholysis develops - the destruction of cells, which leads to the formation of deep blisters that can easily rupture, causing painful erosions. Pemphigus can manifest itself in various forms, including pemphigus vulgaris, pemphigus foliaceus and others, each of which has its own clinical manifestations and prognosis.

History of the disease and interesting historical facts

Pemphigus was first described in the 18th century, but its detailed study did not begin until the 19th century. In the 1920s, German dermatologist Hermann KBR Knudsen identified pemphigus vulgaris as a separate nosological entity. At that time, other aspects of the study began to develop, such as immunological and pathophysiological mechanisms. Throughout the 20th century, a significant amount of research was devoted to studying the mechanisms of the autoimmune reaction that leads to the formation of blisters. Since then, pemphigus has remained a topical issue for medical researchers who are interested in both its pathogenesis and effective treatment methods.

Epidemiology

Pemphigus is a rare disease and affects people of all ages and races. However, differences in prevalence are observed depending on geographical factors. According to studies, the average incidence of pemphigus is 0.2-0.5 cases per 100,000 people per year, while in some regions, especially in the Mediterranean basin and Eastern Europe, the rates can reach 1 case per 100,000 people. The disease occurs with equal frequency in men and women, but pemphigus vulgaris most often manifests itself in people aged 30-60 years.

Genetic predisposition to this disease

Population studies have found an association between pemphigus and certain genes related to the immune response, particularly HLA genes. The HLA-DRB1 and HLA-DQB1 genes have been identified as possible predisposing factors. People with certain genetic markers are 2-5 times more likely to develop pemphigus than the general population. Research suggests that genetic predisposition may interact with environmental factors such as intolerance to certain medications, infectious diseases, or stressful situations.

Risk factors for the development of this disease

There are several factors that contribute to the development of pemphigus:

• Physical factors: Ultraviolet radiation, thermal burns.
• Chemical factors: Certain drugs (eg, penicillamine, nonsteroidal anti-inflammatory drugs) that can provoke exogenous autoimmune reactions.
• Infectious factors: Viral and bacterial infections that can disrupt the body's immune status.
• Stress: Psycho-emotional stress can cause an exacerbation of the disease.
• Other auto diseases: Patients with other autoimmune diseases have an increased risk of developing pemphigus.

Diagnosis of this disease

The main symptom indicating the presence of pemphigus is the appearance of painful blisters on the skin and mucous membranes. An important element of diagnosis is laboratory tests, such as:

• Immunological tests: presence of specific autobodies.
• Histological examination: detection of acantholysis and changes in the dermis.
• Immunofluorescence assay: detection of antibodies directed against intercellular junctions.

In addition, radiological examinations such as ultrasound and CT may be useful to evaluate the skin condition. Differential diagnosis should be made with other dermatoses, including bullous pemphigoid and contact dermatitis.

Treatment

Treatment of pemphigus should be comprehensive and depends on the severity of the disease. The main approaches include:

• General treatment: Maintaining the patient's general condition and observing hygiene measures.
• Pharmacological treatment: Use of corticosteroids, immunosuppressants (eg, azathioprine, methotrexate).
• Surgical treatment: In complex cases, correction of the conditions for healing of erosions, including skin grafts, may be required.
• Other types of treatment: Plasmapheresis to eliminate circulating autoantibodies.

List of medications used to treat this disease

The main medications used to treat pemphigus include:

• Corticosteroids: prednisolone, betamethasone.
• Immunosuppressants: azathioprine, cyclophosphamide.
• Monoclonal antibodies: rituximab.
• Antimicrobial drugs: for secondary infections.

Disease monitoring

Monitoring the condition of a patient with pemphigus includes regular monitoring of antibody levels, assessment of the effectiveness of therapy and monitoring of possible complications:

• Control stages: Visit a dermatologist or immunologist every 1-3 months, depending on the severity of the disease.
• Forecast: With timely treatment, most patients achieve remission, but the risk of relapse remains.
• Complications: Infections associated with open skin lesions and systemic side effects from long-term therapy are possible.

Age-related features of the disease

Pemphigus can manifest itself at any age, but there are age-related features of the course:

• Children: In childhood, pemphigus may manifest itself with more pronounced symptoms and a severe course.
• Adults: Most often, the disease occurs at the age of 30-60 years, with a typical course of the disease.
• Elderly people: In older patients, the disease may progress less predictably with more pronounced side effects of therapies.

Questions and Answers

• What is pemphigus? Pemphigus is an autoimmune disease that causes blisters to form on the skin and mucous membranes.
• What are the main symptoms of pemphigus? The main symptoms include the formation of painful blisters, erosions and ulcers on the skin and mucous membranes.
• How is pemphigus diagnosed? Diagnosis includes visual examination, histological and immunofluorescence studies.
• What is the treatment for pemphigus? Treatment may include corticosteroids, immunosuppressants and, in severe cases, surgery.
• What is the prognosis for pemphigus? With timely and adequate treatment, most patients achieve remission, but the risk of relapse remains.