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Case Reports in Orthopedics
Volume 2017 (2017), Article ID 3974342, 3 pages
Case Report

Synovial Osteochondromatosis at the Carpometacarpal Joint of the Thumb

1Department of Orthopedics, Tochigi Medical Center Shimotsuga, Ohira-machi Kawatsure 420-1, Tochigi City, Tochigi 329-4489, Japan
2Department of Orthopedics, JCHO Utsunomiya Hospital, Minamitakasago-cho 11-17, Utsunomiya, Tochigi 321-0143, Japan

Correspondence should be addressed to Satoru Yonekura

Received 24 November 2016; Accepted 20 December 2016; Published 11 January 2017

Academic Editor: Akio Sakamoto

Copyright © 2017 Satoru Yonekura et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Synovial osteochondromatosis (SOC) is a benign tumor characterized by synovial connective tissue metaplasia. SOC commonly affects major joints including the knee followed by the hip, elbow, and wrist. SOC cases in the hand are not reported as often as SOC of major joints. Particularly SOC of the carpometacarpal joint of the thumb is rare. We report on a 57-year-old female with primary SOC of the carpometacarpal joint of her left thumb. Surgical excision was performed and the patient had no symptoms with full range of motion of her left thumb. At 3 years of follow-up, there was no recurrence.