Fig. 2: H&E, PD-L1 protein and MMR protein immunostaining of breast cancers from MMR variant carriers.

a MLH1 variant carrier, mlh1 and pms2 protein loss; b MSH6 variant carrier, msh6 protein loss; c PMS2 variant carrier, pms2 protein loss; d MSH6 variant carrier, strong pd-l1 protein expression. All scale bars = 300 µm.