“…The presence of nail lesions was reported in 47% of patients with PAM in 1 case series 21 . Patients with PAM had 1 33,37 or more 22,24,25,28,34,40,45,47,52,56,60,63,67,69 affected joints involving any of the interphalangeal, metacarpophalangeal, or metatarsophalangeal joints. PAM was reported to occur within a few months 25,37 and up to several years 33,45 after PsA onset.…”