Lichen nitidus and Crohn's disease.
D000328:Adult; D002081:Buttocks; D003424:Crohn Disease / Q000150:complications* / Q000175:diagnosis; D006801:Humans; D008297:Male; D010409:Penile Diseases / Q000150:complications; D012871:Skin Diseases / Q000150:complications* / Q000175:diagnosis / Q000473:pathology