王武炼　陈嵘　肖莉莉　陈辉　刘献祥　张怡元

摘要： The patella is the largest sesamoid bone in the human body, while the tumor incidence is very low in the patella. It is difficult to diagnose patellar tumors because of the complex and changeable imaging findings, and the treatment was often delayed due to misdiagnosis. This paper reported a case of chondroblastoma combined with bone cysts in the patella, and analyzed the diagnosis of several common patellar tumors.