Chondrosarcoma of the Knee Arising from Synovial Chondromatosis: A Case Report

Synovial chondromatosis is an uncommon disorder resulting from metaplasia of the sub-synovial connective tissue, responsible for the formation of cartilage within the synovial membrane. Malignant transformation into chondrosarcoma is rare. In this article, we report the case of a chondrosarcoma of the knee in a 65-year-old woman undergoing a follow-up for synovial chondromatosis, as we aim to shed light on the importance of the imaging features to differentiate between the two entities.