Colon and endometrial cancers with mismatch repair deficiency can arise from somatic, rather than germline, mutations.
Gastroenterology
Haraldsdottir, Sigurdis S; Hampel, Heather H; Tomsic, Jerneja J; Frankel, Wendy L WL; Pearlman, Rachel R; de la Chapelle, Albert A; Pritchard, Colin C CC