A 9-year-old boy with a rare localisation of synovial osteochondromatosis a
t the left sternoclavicular joint is presented. Synovial osteochondromatosi
s at this site and at this age has not been previously reported. Joint loos
e bodies were removed surgically and partial synovectomy was performed. Fol
low-up showed no evidence of recurrence over a period of 8 years.