chordoma

例句：

1. 1.The chordoma was found in the patient's chest cavity.
   这个瘤体在患者的胸腔内被发现。
2. 2. The doctors performed surgery to remove the chordoma from the patient's body.
   医生们进行了手术，将这个肿瘤从患者体内移除。
3. 3.The patient had to undergo radiation therapy after the chordoma was removed.
   患者在切除肿瘤后不得不接受放疗治疗。