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Competing-Risk Nomogram for Predicting Cancer-Specific Survival in Multiple Primary Colorectal Cancer Patients after Surgery

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Left-Sided Colon Cancer and Right-Sided Colon Cancer: Are They the Same Cancer or Two Different Entities?

Mehdi Bourakkadi Idrissi¹, Hicham El Bouhaddouti¹, Ouadii Mouaqit¹

¹Department of Visceral Surgery, Hassan II University Hospital, Fez, MAR.

|May 16, 2023

Summary

This study found that age and lymph node involvement significantly impact colon cancer outcomes, with left-sided colon cancer showing better survival in advanced stages. Understanding these differences is key for personalized treatment strategies.

Keywords:

five-year disease-free survival five-year overall survival left-sided colon cancer retrospective comparative study right-sided colon cancer

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Area of Science:

Oncology
Gastroenterology
Epidemiology

Background:

Colon cancer is a leading cause of cancer deaths globally and the top digestive cancer in Morocco.
Right-sided and left-sided colon cancers exhibit distinct characteristics influencing disease progression and prognosis.

Purpose of the Study:

To identify epidemiological, clinical, and pathological factors affecting perioperative and prognostic outcomes in right-sided versus left-sided colon cancer.
To compare outcomes between these two distinct colon cancer sub-types.

Main Methods:

Retrospective cohort study from January 2012 to December 2020.
Inclusion of 277 patients, divided into right colon cancer (n=99) and left colon cancer (n=178) groups.
Analysis of epidemiological data, clinical characteristics, and pathological factors.

Main Results:

Average age was 57.4 years; male predominance observed (sex ratio 1.3).
Higher lymph node involvement in left-sided colon cancer (65%) vs. right-sided (34%).
Five-year overall survival: 87% for right-sided, 96.5% for left-sided. Stage III/IV left-sided cancer showed better survival (p=0.029). Age over 61 predicted poor recurrence-free survival (HR=3.245; p=0.023).

Conclusions:

Age and lymph node status are significant prognostic factors in colon cancer.
Differences in outcomes between right-sided and left-sided colon cancer warrant further investigation.
Personalized treatment approaches may improve survival rates for colon cancer patients.