pigmented nevus of penis

例句：

1. 1. The pigmented nevus on his chest is a rare condition that requires immediate medical attention.
   他胸部的色素痣是一种罕见的状况，需要立即医疗关注。
2. 2. He was diagnosed with a pigmented nevus, and the doctor recommended regular monitoring to prevent any potential complications.
   他被诊断出患有色素痣，医生建议定期监测以预防任何潜在的并发症。
3. 3. The patient's family was worried about the potential risk of malignant transformation in a pigmented nevus.
   患者家属担心色素痣恶性转化的风险。