Although expression of HNF1β in carcinomas of mesonephric origin suggests this marker could be of limited use in distinguishing MLA from CCC, the combination of napsin A and Alpha methyacyl CoA racemase can be helpful for their distinction, as both markers are usually diffusely expressed in CCCs and only focally expressed in a minority of MLAs (27). Here, HNF1B is linked to carcinoma.