epidermal cyst

例句：

1. 1. The patient had anepidermal cyst removed fromhis ear.
   患者从耳朵里取出了一个表皮囊肿。
2. 2. Epidermal cysts are common in the skin andcan cause pain and swelling.
   表皮囊肿在皮肤中很常见，可以引起疼痛和肿胀。
3. 3. The doctor advised him to keep thearea clean and dry to prevent further infection.
   医生建议他保持该区域清洁干燥，以防止进一步感染。