Isotretinoin-induced arthritis mimicking both rheumatoid arthritis and axial spondyloarthritis.

Isotretinoin is used for the treatment of various acne lesions that are resistant to other treatments. The most frequent rheumatologic side effect of isotretinoin is transient muscle and/or joint pains. Here, we report a case with bilateral wrist and metacarpophalangeal joint arthritis and unilateral sacroiliitis associated with isotretinoin usage to attract attention, particularly from physiatrists, rheumatologists and dermatologists, to this rare adverse effect of isotretinoin.