A Lynch Syndrome Family With Germline MLH1 c.931A>G Showing Preserved Tumor MMR Immunostaining but MSI‐H Status: A Case Report
ABSTRACT Lynch syndrome screening may be complicated by discordant tumor testing results. We report a family carrying the germline MLH1 c.931A>G (p.Lys311Glu) variant in which both the proband and his father had colorectal tumors with retained mismatch repair protein expression by immunohistochemistry but microsatellit...