Prognosis and chemosensitivity of non-colorectal alimentary tract cancers with microsatellite instability.

Background: Data on outcomes of microsatellite instable and/or mismatch repair deficient (dMMR/MSI) digestive non-colorectal tumors are limited.

Aims: To evaluate overall survival (OS) of patients with dMMR/MSI digestive non-colorectal tumor.

Methods: All consecutive patients with a dMMR/MSI digestive non-colorectal tumor were included in this French retrospective multicenter study.