Ulcerative colitis complicated with linear immunoglobulin A bullous dermatosis

Area of Science:

• Dermatology
• Gastroenterology
• Immunology

Background:

• Linear immunoglobulin A (IgA) bullous dermatosis (LABD) is a rare autoimmune subepidermal blistering disease.
• LABD is characterized by IgA deposition along the epidermal basement membrane.
• A rare association exists between LABD and inflammatory bowel diseases, particularly ulcerative colitis (UC).

Observation:

• A young woman with a history of UC presented with widespread vesicles and erythema.
• Skin biopsy revealed subepidermal bullae and linear IgA deposition at the basement membrane zone via direct immunofluorescence.
• Initial treatment with prednisolone achieved UC remission but showed limited efficacy for the skin lesions.

Findings:

• The patient was diagnosed with ulcerative colitis-associated linear immunoglobulin A bullous dermatosis.
• Diaminodiphenyl sulfone (DDS) therapy led to significant improvement in the bullous and erythematous skin lesions.
• The patient experienced sustained remission of both gastrointestinal and dermatological symptoms.

Implications:

• This case highlights DDS as a potential therapeutic option for managing LABD, especially in patients with coexisting UC.
• Early recognition and appropriate treatment of LABD are crucial for improving patient outcomes.
• Further research may elucidate the specific mechanisms linking UC and LABD, guiding targeted therapies.