sebaceous cyst of chest wall

例句：

1. 1.He had a sebaceous cyst on his back that required surgery.
   他的背上有一个皮脂腺囊肿，需要手术。
2. 2.The sebaceous cyst was causing him significant discomfort.
   这个皮脂腺囊肿给他带来了很大的不适。
3. 3. The doctor removed the sebaceous cyst and advised him to keep it clean and dry.
   医生取出了皮脂腺囊肿，并建议他保持清洁干燥。