Table 2.

Microsatellite instability testing results.

Test items	MSI locus	MSS locus	Non-compliant locus	Score
MSI	MSI-30, MSI-72, MSI-27, MSI-73, MSI-61-MONO27, MSI-160, MSI-150, MSI-148, MSI-158, MSI-39, MSI-38, MSI-145, MSI-155, MSI-41, MSI-43, MSI-171, MSI-45, MSI-176, MSI-46, MSI-49, MSI-182, MSI-186, MSI-47, MSI-53, MSI-54, MSI-03-CAT25, MSI-197, MSI-58, MSI-77, MSI-78, MSI-91, MSI-90, MSI-101, MSI-63-NR22, MSI-105, MSI-06, MSI-106, MSI-108, MSI-09, MSI-111, MSI-115, MSI-17, MSI-15, MSI-134, MSI-135, MSI-129, MSI-131, MSI-170	MSI-26, MSI-28, MSI-64-NR24, MSI-157, MSI-142, MSI-165, MSI-140, MSI-48, MSI-184, MSI-52, MSI-194, MSI-55, MSI-193, MSI-198, MSI-200, MSI-75, MSI-85, MSI-07, MSI-109, MSI-62-NR21, MSI-110, MSI-11,MSI-114, MSI-14, MSI-128, MSI-124, MSI-119, MSI-20, MSI-208, MSI-60	MSI-02-BAT-26	48/78 = 0.6154>0.3

This method assesses microsatellite instability based on results from 79 specific microsatellite loci using a score calculated as: MSI Score = Number of unstable microsatellite loci/Number of effective loci microsatellite instability: Valid loci ≥ 20; MSI Score < 0.3 indicates microsatellite stability; MSI Score ≥ 0.3 indicates microsatellite instability.