Sacroiliitis and acne conglobata.

A 24-year old man developed a bilateral sacroiliitis in association with acne conglobata. The acne conglobata was followed after the use of prednisone during 9 months. The prednisone was taken for a severe form of sarcoidosis. This may be a new instance of a relatively uncommon and poorly understood relationship between a particular form of acne and associated arthritis.