形容詞 precancerous:

1. of or relating to a growth that is not malignant but is likely to become so if not treated

pre.can.cer.ous

adj.（形容詞）
Of, relating to, or being a condition that typically precedes or develops into a cancer:
癌癥前期的，可能癌變的：癌癥前的或發(fā)展成癌癥之前的狀況的，與之有關(guān)的或處于其中的：
例句：
a precancerous growth.
癌癥前期的惡化