Which skin lesions are associated with inflammatory bowel disease?

• A. Erythema nodosum and Pyoderma gangrenosum
• B. Psoriasis and eczema
• C. Urticaria and angioedema
• D. Acne and rosacea

Answer: (A)

Inflammatory bowel disease often presents with skin involvement as part of its systemic effects. The two classic skin lesions linked with IBD are erythema nodosum and pyoderma gangrenosum. Erythema nodosum shows up as tender, red to violet nodules, usually on the shins, and can accompany IBD flares or joint symptoms. Pyoderma gangrenosum begins as painful nodules or pustules and rapidly progresses to ulcers with undermined borders; it can appear on the legs or at sites of trauma and may mirror bowel disease activity. Together, these two skin findings are the most characteristic dermatologic associations with IBD and alert clinicians to look for or manage intestinal inflammation alongside the skin.

Other skin conditions like psoriasis or eczema can occur in people with IBD but are not the classic, specific link to the disease. Urticaria, angioedema, acne, and rosacea are not typically associated as direct manifestations of IBD.