{Reference Type}: Journal Article {Title}: Constitutional mismatch repair deficiency: a case on a commonly misinterpreted mutation in colon cancer. {Author}: C K;H E;E T;M A;A C;A P;J S; {Journal}: Clin J Gastroenterol {Volume}: 0 {Issue}: 0 {Year}: 2024 Aug 2 暂无{DOI}: 10.1007/s12328-024-02015-9 {Abstract}: It is estimated that 153,020 cases of CRC per year, with an increase in diagnoses in younger patients. We present a case of a female with an early presentation of Lynch Syndrome and CRC, who, on her third malignant presentation, was re-diagnosed as a constitutional mismatch repair deficiency.