Mass-like calcific peri-arthritis in the wrist: a rare case presenting as acute carpal tunnel syndrome and requiring surgical intervention.

Hydroxyapatite deposition disease (HADD) is a common localized disorder characterized by deposition of hydroxyapatite in soft tissues. These hydroxyapatite deposits can be found in the periarticular soft tissues such as bursae, joint capsules, tendon sheaths, and ligaments as well as within the tendons themselves, and intra-articular involvement has also been described [1,2]. We present a case of a 50-year-old female with acute symptoms of carpal tunnel syndrome secondary to partially liquified, mass-like, inflammatory calcific peri-arthritis. The case is supplemented with the use of multimodality imaging, a surgical perspective, and histopathologic correlation.