101P Real-world Prevalence of MSI-H/dMMR Across 6 Different Tumor Types in Asia

Data on the prevalence of microsatellite instability-high (MSI-H)/deficient mismatch repair (dMMR) across advanced solid tumors are limited in patients from Asia. The clinicopathologic characteristics and treatment patterns in Asian patients with MSI-H/dMMR tumors are also not well known. We report the prevalence of MSI-H/dMMR across 6 tumor types in Asia and describe the clinicopathologic characteristics and treatment patterns for patients with MSI-H/dMMR and non–MSI-H/dMMR tumors.