Giant intra-articular synovial chondromatosis of knee joint mimicking malignancy: A rare case report

Abstract

Synovial chondromatosis is a rare benign condition arising from the synovial membrane of the joints, synovial sheaths, or bursae around the joints. Primary synovial chondromatosis typically affects the large joints in the third to fifth decade of life. The purpose of this case report is to document this rare giant synovial pathology, which was mimicking malignancy clinically but diagnosed as intra-articular synovial chondromatosis histopathologically. In our case, the gross size was measuring 11 cm × 8 cm × 6 cm.