Cutaneous features of Behçet syndrome

Cutaneous lesions are common in Behçet syndrome. The most frequent include:

• acneiform lesions—see Acne
• pseudofolliculitis
• papulopustular lesions
• erythema nodosum—see Erythema nodosum
• pyoderma gangrenosum—see Pyoderma gangrenosum.

Although a pathergy reaction is characteristic of Behçet syndrome in some parts of the world, it is uncommon in the Australian population. A pathergy reaction is where simple trauma to the skin is associated with papule or pustule formation at the site of an injury within 48 hours.