%0 Journal Article %T A double patella-like condition secondary to synovial osteochondromatosis %A Kajikawa Yoshiteru %A Arai Yuji %A Takamiya Hisatake %A Higuchi Tetsuo %J Sports Medicine, Arthroscopy, Rehabilitation, Therapy & Technology %D 2012 %I BioMed Central %R 10.1186/1758-2555-4-31 %X To our knowledge, this is the first case of synovial osteochondromatosis in a patient presenting with a double patella-like condition. The true duplication of the patella, which is called double patella, is extremely rare. In our case, the operative and histopathological findings showed that the double patella-like condition was secondarily induced by synovial osteochondromatosis. Synovial osteochondromatosis should be considered as a differential diagnosis for congenital double patella. %K Osteochondromatosis %K Synovial osteochondromatosis %K Chondromatosis %K Double patella %K Knee %U http://www.smarttjournal.com/content/4/1/31