serous cyst of nasal sinuses

例句：

1. 1. The patient had a serous cyst in the sinus that required surgery.
   患者有一个位于鼻窦的严重囊肿，需要手术。
2. 2. The doctor diagnosed her with a serous cyst and recommended antibiotics.
   医生诊断她患有一个严重囊肿，并建议使用抗生素。
3. 3.The patient's condition worsened after the surgery, and he needed to have another serous cyst removed.
   手术后，患者的病情恶化，需要再次移除另一个严重囊肿。