Generally speaking, the transition from dysplastic cells to malignant cells occurs gradually.

一般来说，异型增生的细胞变成癌细胞的过程是渐进性的。

And as cells become more and more dysplastic the lesions sometimes develop red spots, and at that point it's called erythroleukoplakia.

随着细胞异型增生的程度越来越高，这些病损（白斑）上可出现红色的点，此时我们把它称作红白班。