Dermatologic manifestation of Behçet's disease.

Dermatologic lesions in Behçet's disease are regarded as important manifestation for diagnosis. Various kinds of cutaneous lesions appear in patients with Behçet's disease. They present as erythema nodosum-like lesion, papulopustular eruption, erythema multiforme-like lesion, thrombophlebitis, skin ulcer, Sweet's syndrome-like lesion, bullous necrotizing vasculitis, and pyoderma gangrenosum. The hyperreactivity of the skin to any intracutaneous injection or needle prick, which is known as pathergy, is one clinically-unique feature of the disease.