Immune complex disease of the skin

Area of Science:

• Immunodermatology
• Pathology
• Rheumatology

Background:

• Immune complex diseases manifest in the skin.
• Understanding the clinical setting is key to diagnosis.
• Blood tests and skin biopsies aid in confirmation.

Observation:

• Cutaneous manifestations of immune complex disease are recognizable clinically and histopathologically.
• Specific clinical environments are associated with these reactions.
• Blood studies (immunoglobulins, complement, B cells) can confirm the reaction type.

Findings:

• Immune complexes can be directly detected in blood via cryoprotein or C1q studies.
• Skin biopsy with immunofluorescence confirms the skin disease and immune complexes.
• Biopsy of normal skin can offer prognostic information on disease severity.

Implications:

• Diagnosis is aided by clinical recognition, blood tests, and skin biopsies.
• Induced lesions can facilitate further study and diagnosis.
• Therapeutic options include corticosteroids, sulfapyridine, nicotinic acid, antimalarials, clofazimine, and plasmapheresis.