Calcific Periarthritis of Metacarpophalangeal Joint Secondary to Ruptured Calcific Dorsal Bursitis – A Case Report

Acute calcific periarthritis (ACP) is a painful monoarticular disease commonly involving the shoulder joint, characterized by deposits of calcium hydroxyapatite crystals around joints. Clinical mimics include septic arthritis, gout, and pseudogout. It is a rare disease of hand and only few cases have been reported. We describe the imaging findings of ACP of metacarpophalangeal joint secondary to ruptured calcific dorsal bursitis, in a 30-year-old woman who presented with complaints of local pain and swelling of the left fourth finger. Accurate diagnosis of this condition is essential to avoid unnecessary investigations, procedures, and patient anxiety.