Incidence of osteoperiostitis of the great toe in psoriatic arthritis.

Objective: To assess the incidence of osteoperiostitis of the distal phalanx of the great toe in psoriatic arthritis (PsA).

Methods: One thousand great toes (202 of PsA, 44 of cutaneous psoriasis, 274 of low back pain patients, 296 of rheumatoid arthritis, 136 of spondyloarthropathy, and 48 of connective tissue diseases) were studied for osteoperiostitis of the distal phalanx of the great toe (slight, moderate, or severe), destructive joint lesions of the feet, nail dystrophy, fungal infection, and HLA-B type (patients with PsA).

Results: Osteoperiostitis was observed in 92 great toes.