1. Patients with Colorectal Cancer - Current guidelines recommend MSI testing for all newly diagnosed colorectal cancers to identify Lynch syndrome and to guide treatment decisions.
2. Patients with Endometrial Cancer - MSI testing is also recommended for individuals with endometrial cancer, especially for those with a family history of Lynch syndrome-associated cancers.
3. Patients with Other Types of Cancer - MSI testing may be considered for other cancers such as gastric, ovarian, and small bowel cancers, particularly if there is a clinical suspicion of Lynch syndrome or if the tumor exhibits features suggestive of MSI-H.
