MSI in gastric carcinoma (T) and IM (M). A: Representative samples from different patients displaying MSI in tumor (BAT25 and BAT26) and in IM (D2S123, D13S170, D17S250, and TP53). N, Normal control. B: Samples demonstrate MSI in both tumor and IM. The two panels on the left showed similar banding patterns in tumor and IM, whereas the third panel showed a different banding pattern between tumor and IM. The panel on the right showed MSI in tumor only.