老农民李大伯年已六十多,近来感到右侧膝关节酸痛、肿胀、伸屈时经常发出响声。一次,见到膝眼处有几个球状物隆起,他下意识地伸手去抓,刚一触到,球状物象小老鼠,已溜得不知去向。李大伯到医院求治,对医生说,我关节里象钻进了 Li Peibo old peasant has more than 60 years, recently felt the right knee pain, swelling, flexion often make a noise. Once, to see the knee at the Department of a few bulge uplift, he subconsciously reach out to grasp, just touch, the ball like a mouse, has slipped away. Li Dabo to the hospital for treatment, the doctor said, I like the drill into the joints