Arthritis mutilans (AM) is a rare condition that develops in approximately 5% of patients with psoriatic arthritis (PsA)1. It is characterized by marked osteolysis, resulting in the classic “pencil-in-cup” radiographic appearance and clinical evidence of digit shortening. We describe a patient who developed AM after many years of psoriasis.
A 34-year-old woman, with psoriasis for 21 years, presented with a 3-month history of worsening rash …
