label: Mutation-Negative Lynch Syndrome
label_lc: mutation-negative lynch syndrome
description: "A finding of Lynch syndrome in which one is identified as having a \"non-sporadic\" DNA mismatch repair (MMR) deficient premalignant lesion or \"non-sporadic\" MMR deficient malignant tumor, but germline MMR genetic testing did not demonstrate a recognized pathogenic mutation in the genes responsible for DNA mismatch repair."