Disorder of cellular immunity in pemphigus vegetans

Area of Science:

• Immunology
• Dermatology
• Autoimmune Diseases

Background:

• Neumann's pemphigus vegetans is a rare autoimmune blistering disease.
• The etiology of pemphigus vegetans, particularly its association with immune deficiencies, requires further investigation.
• Thymoma and myasthenia gravis are sometimes associated with pemphigus but were absent in this case.

Observation:

• An untreated 26-year-old female patient presented with pemphigus vegetans for 8 months.
• The patient exhibited multiple in vivo and in vitro signs of immunodeficiency affecting both T and B cell systems.
• Specific observations included low IgG serum levels, reduced T cell counts, and diminished lymphocyte response to PHA.

Findings:

• The patient displayed a lack of skin reactivity to recall and bacterial antigens.
• Impaired neutrophil chemotaxis and reduced intracellular killing of Candida albicans by polymorphonuclear leukocytes (PMNL) were noted.
• A diagnosis of a defective immune state was established, indicating a combined B and T cell disorder.

Implications:

• The findings suggest that a combined disorder of the B and T cell systems may play a role in the etiology of pemphigus vegetans.
• This challenges the assumption that thymoma is a prerequisite for immune dysfunction in pemphigus vegetans.
• Further research into immune deficiencies associated with pemphigus vegetans is warranted.