Low-Frequency Microsatellite Instability

**Semantic type:** Cell or Molecular Dysfunction

**Definition:** Genomic instability associated with the presence of hypermutation either in one microsatellite instability (MSI) marker or in between 10 and 30 percent of the MSI markers in a tumor sample.

**Synonyms:** - MSI low - MSI-L - Microsatellite Instability Low