“…If these forms of manifestations appear separately long before intestinal symptoms occur, this may lead to a significant delay in forming the diagnosis [7,14,17]. In the literature the following cutaneous and mucocutaneous changes are discussed: perianal fistula and ulcera, peristomal ulcera, erythema nodosum, pyoderma gangraenosum, cheilitis granulomatosa, periarteriitis nodosa, oral aphthae as well as erythema exsudativum multiforme-like skin disturbances [4,5,8,12,16].…”