nevus anemicus

例句：

1. 1. The patient had a nevus anemicus on his forehead that was gradually growing larger.
   患者额头上有一块逐渐变大的贫血痣。
2. 2. The doctor noticed a nevus anemicus on the patient's neck and advised him to see a specialist.
   医生注意到患者脖子上有一块贫血痣，并建议他去看专家。
3. 3. The nevus anemicus on the patient's arm was a reminder of his past struggles with anemia.
   患者手臂上的这块贫血痣提醒了他过去与贫血的斗争。