PT - JOURNAL ARTICLE AU - L Green AU - O L Meyers AU - W Gordon AU - B Briggs TI - Arthritis in psoriasis. AID - 10.1136/ard.40.4.366 DP - 1981 Aug 01 TA - Annals of the Rheumatic Diseases PG - 366--369 VI - 40 IP - 4 4099 - http://ard.bmj.com/content/40/4/366.short 4100 - http://ard.bmj.com/content/40/4/366.full SO - Ann Rheum Dis1981 Aug 01; 40 AB - A group of 61 unselected patients with psoriasis attending a dermatology clinic were studied to determine the prevalence of psoriatic arthritis. On defined criteria arthritis was present in 41.6%. Peripheral arthritis was present in 15.5%, and sacroiliitis in 43%. A strong association of distal interphalangeal arthritis with psoriasis and nail dystrophy was confirmed. Tissue typing showed a strong association of B23, 17, in Caucasoid psoriatics, while the haplotype A1/B8 was increased in mixed Caucasoid--Negroid psoriatics.