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Synovial Osteochondromatosis of the Subtalar Joint in an Adolescent Baseball Player
Korean J Sports Med 2018;36:221-226
Published online December 1, 2018;
© 2018 The Korean Society of Sports Medicine.

Jong Woo Chae, Hyung Lae Cho, Yong Seung Oh, Wan Seok Lee

Department of Orthopaedic Surgery, Good Samsun Hospital, Busan, Korea
Correspondence to: Yong Seung Oh
Department of Orthopaedic Surgery, Good Samsun Hospital, 326 Gaya-daero, Sasang-gu, Busan 47007, Korea
Tel: +82-51-310-9260, Fax: +82-51-310-9348 E-mail:
Received September 20, 2018; Revised November 4, 2018; Accepted November 4, 2018.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Synovial chondromatosis is an uncommon disorder characterized by cartilaginous proliferation within the synovial membrane of the articular joint. Smaller joints are rarely affected and it may be progressed to osteochondromatosis after ossification or calcification of metaplastic cartilage. It is commonly presented in the third to fourth decade of life, but rarely presented in adolescence. We report a unique case of synovial osteochondromatosis of the subtalar joint in 14-year-old baseball player. Arthroscopic removal of loose body and complete excision of the osteochondral mass with concomitant synovectomy resulted in satisfactory outcome without recurrence at final follow-up.
Keywords : Adolescent, Arthroscopy, Baseball player, Subtalar joint, Synovial chondromatosis
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