Tenosynovitis With Psammomatous Calcification Preoperatively Diagnosed as Intra-Articular Free Body of the Young Male Wrist: A Case Report.

Tenosynovitis with psammomatous calcifications is a rare condition primarily affecting female patients in the distal extremities. This case report presents a unique instance of tenosynovitis with psammomatous calcification in a 31-year-old man presenting with wrist pain. Initial misdiagnosis and unsuccessful steroid injections prompted further investigation, leading to the discovery of an extra-articular calcified mass. Arthroscopic resection was attempted but found to be unnecessary because the lesion was located outside the joint. Histopathological examination confirmed the diagnosis of tenosynovitis with psammomatous calcification. After mass removal, the patient experienced relief from wrist pain and resumed work within a month. Subsequent follow-ups at 9 months showed no recurrence of pain, with full range of wrist motion and no grip power weakness. This case highlights the importance of differentiating tenosynovitis with psammomatous calcification from intra-articular lesions, particularly in atypical presentations, and demonstrates the effectiveness of surgical intervention in resolving symptoms.