nonpigmented nevus

例句：

1. 1.This nonpigmented nevus on his arm has been causing him discomfort.
   他手臂上的这个非色素痣一直让他感到不舒服。
2. 2. The doctor removed the nonpigmented nevus and replaced it with a skin graft.
   医生把这块非色素痣切除，并用皮肤移植物替换了它。
3. 3.The patient was referred to a dermatologist for further evaluation of the nonpigmented nevus.
   患者被转介给皮肤科医生，以进一步评估那块非色素痣。