Arthritis and tenosynovitis, skin and renal localization as manifestations at onset of sarcoidosis: role of the whole-body PET

Introduction: Sarcoidosis is characterized by a granulomatous inflammatory reaction that usually presents with mediastinal and hilar lymphadenopathy and with variable involvement of the lungs. Other organs may be involved, including the skin, kidneys, liver, salivary glands, and bone marrow. The reported incidence of bone involvement varies but may be more common in patients with musculoskeletal complaints. If arthritis is a frequent complication (23%), tenosynovitis is a rare sign of onset of sarcoidosis. We report a case of proliferative tenosynovitis of the hands and ankles in sarcoidosis and the suggestive r…