tendinous sheath of extensor digitorum longus

例句：

1. 1. The doctor performed an operation to remove the tendinous sheath that was causing pain in my finger.
   医生进行了手术，移除了导致我手指疼痛的腱鞘。
2. 2. Tendinous sheaths are important structures that protect and support muscles.
   腱鞘是保护和支持肌肉的重要结构。
3. 3. Injuries to the tendinous sheath can lead to chronic pain and disability.
   腱鞘损伤可能导致慢性疼痛和残疾。