It is most common in the knee, shoulder joints, in which of knee joint onset in 19 cases (51.35%), shoulder in 6 cases (16.22%), more than one joints onset in 10 cases (27.03%).

• 病变主要累及膝、肩等大关节，其中膝关节发病19例(51.；35%25)，肩关节6例(16