Global Hypertrophic Calcification of Shoulder Joint Capsule

BACKGROUND: Calcification around the shoulder joint usually occur inside or around the tendons of the rotator cuff. We herein report on a case of global hypertrophic calcification of shoulder joint capsule in a patient with Rheumatoid arthritis. CASE REPORT: An 86 years-old male with a long-standing history of seropositive Rheumatoid arthritis. The treatment for his Rheumatoid arthritis included Methotrexate and Hydroxychloroquine initially, but due lack of control, adalimumab was added with excellent control of his arthritis. He has progressively experienced an increasing pain and stiffness in his shoulders, in addition to an increasing limitation of shoulder movement. Magnetic Resonance Imaging revealed severe arthritis with remoulding deformity with extensive capsular calcification, intra-articular loose-bodies. DISCUSSION: This phenomenon of calcification of shoulder capsule has not been reported before. The pathophysiology of calcific tendinopathy of the shoulder remains controversial. The calcific deposits consist of poorly-crystallized hydroxyapatite. CONCLUSION: Global hypertrophic calcification of shoulder joint capsule is unique and unreported in the literature. We can postulate that the long-standing inflammation of the synovial lining of the capsules had a major part. Moreover, Diabetes Mellitus, smoking, and repetitive manoeuvres are recognized contributing factors as well for similar conditions. Genetic predisposition seems to play a role as well. We think all those have played part in the development of this unprecedented presentation. Management should be tailored to target specific symptoms for pain, rigidity, and decreasing calcification size. Several options are available, including Kinesiotherapy, electrotherapy modalities, iontophoresis, electroshock wave therapy, and finally surgical approaches for progressive and refractory cases.