synovial diverticulum

例句：

1. 1. The patient's condition is improving with the treatment.
   患者的病情随着治疗正在改善。
2. 2.The surgeon removed the tumor from the synovial cavity.
   外科医生从关节囊中取出了肿瘤。
3. 3. The doctor advised him to avoid activities that put pressure on his joints.
   医生建议他避免对关节施加压力的活动。