Incidence and Dynamics of CRC Stage Migration: A Regional vs. a National Analysis.

Background/objectives: Due to an increased rate of surveillance colonoscopy, we aim to determine the impact of stage migration on the incidence and overall survival (OS) of patients who underwent pathological staging of colorectal cancer (CRC) at our Health Network System.

Methods: Two datasets were included: subjects from the tumor registry at a regional Comprehensive Cancer Center = 1385) and subjects from the Surveillance, Epidemiology, and End Results (SEER) national database ( = 202,391).

Results: A significant increase in the diagnosis of CRC Stage 1 and 4 was observed, with a decrease in stage 2, and no change in Stage 3 in the National datasets ( < 0.

Constitutional mismatch repair deficiency: a case on a commonly misinterpreted mutation in colon cancer.

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.