precancerous

例句：

1. 1. The woman's breast cancer was found to be precancerous.
   这名女性的乳腺癌被诊断为癌前状态。
2. 2.The study found that the diet of this region is premalignant for breast cancer.
   研究发现该地区的饮食对乳腺癌有癌前作用。
3. 3. The doctor advised her to undergo regular mammograms to detect any precancerous changes in her breast tissue.
   医生建议她定期进行乳房X光检查，以检测乳腺组织中的任何癌前变化。