br With respect to the
With respect to the differences stated above in the out-come of patients according to tumor laterality, some authors have suggested that colorectal cancer should be divided into right cancer (from the ascending colon to the splenic flex-ure) and left cancer (from the splenic flexure to the rectum). Based on that classification, the 2-year OS was higher than that found for cancer of the colon and rectum, but the 5-year OS was similar. Our findings were different from those of other international studies in which OS of patients with cancer of the right colon was lower,50,53-56 which has also been debated in light of findings in other cohorts57-60 that, like our study, reported the same OS for the tumors on both sides and even a better survival rate for tumors on the left side.
The main strength of the present study was its sizable number of patients, being the second largest Colombian case series after the study by Bohórquez et al,9 and its main weak-ness was the fact that certain data were not reported in the medical records, a common failing in descriptive stud-ies. We were able to show that the patients were similar to those evaluated in both national and international studies, that their management followed the guidelines established by different medical societies, and that patient survival was lower than that observed in developed countries, most likely because Colombia is a county lacking in resources and there-fore access to healthcare services is difficult in some cases. It was concluded that screening strategies as stipulated in the different guidelines, as well as the Colombian ones,61 must be strengthened, given their beneficial impact in rela-tion to colorectal cancer deaths. Detection at earlier stages of the disease will result in lower recurrence and mortality rates.62
No specific grants were received from public sector agen-cies, the business sector, or non-profit organizations in relation to this study.
Protection of human and animal subjects. The authors declare that no experiments were performed on humans or animals for this study.
Confidentiality of data. The authors declare that they Ko 143 have followed the protocols of their work center on the publica-tion of patient data.
Right to privacy and informed consent. The authors declare that no patient data appear in blending article.
Conflict of interest
The authors declare that there is no conflict of interest.
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