Anatomical Distribution of Colon Cancer: A Retrospective 10-year Study to Evaluate Rightward Shift in Two Referral Hospitals in Iran

IF 0.4 Q4 ONCOLOGY

International Journal of Cancer Management Pub Date : 2022-12-14 DOI:10.5812/ijcm-128897

Ahmad R Mafi, Shima Azimi Oliaei, R. Heshmat, H. Yahyazadeh, Ali Motlagh

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Abstract

Background: In Iran, the incidence of colorectal cancer has been increasing over the last 25 years. Although left-sided colon cancers are still more common, several studies in recent years have shown a shift toward right colon. This rightward shift could have important clinical and healthcare consequences, as right-sided tumors generally have poorer prognoses compared to left-sided tumors and besides, are more likely to be missed in screening colonoscopy. Objectives: This retrospective study aimed at describing the demographic and clinicopathologic characteristics of patients with colon cancer based on tumor sidedness in two referral hospitals in Tehran. Methods: Data of the patients with colon cancer who had been treated from 2010 to 2020 in two referral hospitals in Tehran, Iran were retrospectively reviewed. Collected data included patients’ demographics, tumor histology and differentiation, tumor location, stage, and disease-free survival (DFS). Results: A total of 1535 cases entered the study including 849 (55.3%) males and 686 (44.7%) females with a mean age of 58.22 years (range: 22 - 89). Regarding the sidedness, 800 (52.1%) had left-sided and 735 (47.9%) had right-sided tumors. Although there were more cases of left-sided tumors compared to right-sided ones on total, there existed a trend toward shifting to the right side, which was statistically significant. There existed more cases of poorly differentiated tumors in the right side and besides, right-sided tumors had poorer DFS compared to the left-sided tumors (68.3% vs 78.3%). Conclusions: Left and right colon tumors differ in molecular mechanisms involved in tumorigenesis. These differences in epidemiological, molecular and histological parameters can have clinical implications. Tumor-sidedness should be acknowledged as an important epidemiological parameter with significant impacts on screening, tumorgenesis, response to treatment, and prognosis.

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结肠癌解剖分布:伊朗两家转诊医院10年回顾性研究

背景:在伊朗，结直肠癌的发病率在过去的25年里一直在增加。尽管左结肠癌仍然更常见，但近年来的几项研究表明，右结肠癌的发病率正在转变。这种向右转移可能具有重要的临床和医疗保健后果，因为右侧肿瘤通常比左侧肿瘤预后较差，而且在结肠镜检查中更容易被遗漏。目的:本回顾性研究旨在描述在德黑兰两家转诊医院肿瘤侧方基础上的结肠癌患者的人口学和临床病理特征。方法:回顾性分析伊朗德黑兰两家转诊医院2010 ~ 2020年收治的结肠癌患者资料。收集的数据包括患者的人口统计学、肿瘤组织学和分化、肿瘤位置、分期和无病生存期(DFS)。结果:共入组病例1535例，其中男性849例(55.3%)，女性686例(44.7%)，平均年龄58.22岁(22 ~ 89岁)。侧边性方面，左侧肿瘤800例(52.1%)，右侧肿瘤735例(47.9%)。虽然总体上左侧肿瘤多于右侧肿瘤，但有向右侧转移的趋势，具有统计学意义。右侧低分化肿瘤较多，且右侧肿瘤的DFS较左侧肿瘤差(68.3% vs 78.3%)。结论:左、右结肠肿瘤发生的分子机制不同。这些流行病学、分子和组织学参数的差异可能具有临床意义。肿瘤侧性是一个重要的流行病学参数，对筛查、肿瘤发生、治疗反应和预后有重要影响。

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来源期刊

International Journal of Cancer Management ONCOLOGY-

CiteScore

1.10

自引率

0.00%

发文量

期刊介绍： International Journal of Cancer Management (IJCM) publishes peer-reviewed original studies and reviews on cancer etiology, epidemiology and risk factors, novel approach to cancer management including prevention, diagnosis, surgery, radiotherapy, medical oncology, and issues regarding cancer survivorship and palliative care. The scope spans the spectrum of cancer research from the laboratory to the clinic, with special emphasis on translational cancer research that bridge the laboratory and clinic. We also consider original case reports that expand clinical cancer knowledge and convey important best practice messages.