obsolete_Synovial Chondromatosis https://rarediseases.info.nih.gov/diseases/6054/synovial-chondromatosis true UMLS:C0008476 Synovial chondromatosis is a type of non-cancerous tumor that arises in the lining of a joint. The knee is most commonly affected, however it can affect any joint. The tumors begin as small nodules of cartilage. These nodules can separate and become loose within the joint. Some tumors may be no larger than a grain of rice. Synovial chondromatosis most commonly occurs in adults ages 20 to 50. Signs and symptoms may include pain, swelling, a decreased range of motion, and locking of the joint. The exact underlying cause of the condition is unknown. Treatment may involve surgery to remove the tumor. Recurrence of the condition is common. Reichel's syndrome MESH:D015838 synovial osteochondromatosis synovial chondromatosis Replaced by Mondo term MONDO_0006438, with which this term was previously merged. Use: http://purl.obolibrary.org/obo/MONDO_0006438 3.88.0 GARD:0006054 EFO:1000557 http://purl.obolibrary.org/obo/MONDO_0006438 NCIT:C34467 Henderson-Jones syndrome