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Pemphigus Vulgaris: Causes, Symptoms and Treatment

Pemphigus vulgaris is a rare, severe autoimmune disease of the skin and mucous membranes that causes painful blisters. Early diagnosis and treatment are essential for a good outcome.

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Things worth knowing about "Pemphigus vulgaris"

Pemphigus vulgaris is a rare, severe autoimmune disease of the skin and mucous membranes that causes painful blisters. Early diagnosis and treatment are essential for a good outcome.

What is Pemphigus Vulgaris?

Pemphigus vulgaris is a rare, chronic autoimmune disease that affects the skin and mucous membranes. The immune system mistakenly produces antibodies against specific proteins called desmogleins, which normally hold skin cells together. This causes the upper layers of skin cells to separate, resulting in large, fragile blisters that rupture easily. Without adequate treatment, the disease can be life-threatening.

Causes

The exact cause of pemphigus vulgaris is not fully understood. It is an autoimmune condition in which the body produces antibodies -- primarily against desmoglein 1 and desmoglein 3 -- that attack the connections between skin cells. Known risk factors and potential triggers include:

Genetic predisposition (more common in certain ethnic groups, such as Ashkenazi Jews or people from the Mediterranean region)
Certain medications (e.g., penicillamine, ACE inhibitors)
Possible environmental triggers or infections in genetically susceptible individuals

Symptoms

The symptoms of pemphigus vulgaris can vary depending on the stage of the disease and may include:

Painful, flaccid blisters on the skin and mucous membranes, often first appearing in the mouth
Erosions and raw sores after blisters rupture, which are slow to heal
Pain when eating, drinking, or speaking (when mucous membranes are affected)
Positive Nikolsky sign: gentle rubbing or pressure causes the outer layer of skin to slide or peel away
General malaise and possible weight loss due to pain while eating

Diagnosis

Diagnosing pemphigus vulgaris typically involves several steps:

Clinical examination: Assessment of blister appearance and the Nikolsky sign by a dermatologist
Skin biopsy: A small tissue sample is examined under a microscope; characteristic findings include suprabasal acantholysis (splitting of skin cells just above the basal layer)
Direct immunofluorescence: Detection of antibody deposits within the skin tissue
Blood tests (indirect immunofluorescence / ELISA): Detection of circulating antibodies against desmoglein 1 and 3 in the bloodstream

Treatment

Treatment of pemphigus vulgaris aims to control blister formation, relieve pain, and prevent complications. Therapy is usually long-term and may include:

Pharmacological Treatment

Corticosteroids (e.g., prednisolone): First-line therapy that suppresses the excessive immune response. High doses are often required initially, with gradual tapering over time.
Immunosuppressants (e.g., azathioprine, mycophenolate mofetil): Used in combination with corticosteroids to reduce required steroid doses and minimize side effects.
Rituximab: A monoclonal antibody that selectively targets and depletes B cells (the producers of the harmful antibodies). Now considered a key treatment option, including as a first-line therapy in some cases.
Intravenous immunoglobulins (IVIG): Used in severe or treatment-resistant cases
Plasmapheresis: Removal of harmful antibodies from the blood in severe disease

Wound Care and Supportive Measures

Regular wound care to prevent infections
Pain management and nutritional support when mucous membranes are affected
Regular follow-up appointments with a dermatologist

Prognosis

With modern treatment, the prognosis of pemphigus vulgaris has improved significantly. Historically, the disease was often fatal; today, many patients achieve complete or partial remission. However, relapses can occur, making long-term medical monitoring essential.

References

Murrell DF et al. - Diagnosis and evaluation of autoimmune blistering diseases. Journal of the American Academy of Dermatology, 2020.
Hertl M et al. - Pemphigus. S2k-Guideline of the German Dermatological Society (DDG), 2020.
World Health Organization (WHO) - Rare Diseases: Pemphigus vulgaris. WHO Global Report, 2022.

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