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Clinical and prognostic differences between surgically resected right-sided and left-sided colorectal cancer

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Abstract

Purpose

A growing body of evidence suggests that right-sided colorectal cancer (RCRC) differs from left-sided colorectal cancer (LCRC) in certain clinicopathological features. Therefore, we investigated the difference between RCRC and LCRC in a series of 899 patients.

Methods

We reviewed data retrospectively, from 899 patients who underwent R0-resection for stage II and III CRC and compared the clinicopathological factors between patients with RCRC and LCRC.

Results

The patients with RCRC tended to be older, more likely female, with a larger tumor, higher pathological T stage, and a greater proportion of their tumors were poorly differentiated adenocarcinoma, mucinous adenocarcinoma, or signet ring cell carcinoma than the patients with LCRC,. Recurrence-free survival (RFS) of the patients with RCRC tended to be higher than that of the patients with LCRC and was significantly better among patients with stage II cancer. The overall survival (OS) was similar for patients with RCRC and LCRC, irrespective of cancer stage.

Conclusion

Compared with the patients with LCRC, those with RCRC had several oncologically unfavorable factors, with better RFS in stage II and similar OS in stages II and III. These results suggest that the biological aggressiveness of RCRC is lower than that of LCRC in stage II; however, it can increase after relapse.

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Authors and Affiliations

  1. Department of Gastrointestinal Surgery, Japanese Red Cross Nagoya First Hospital, Nakamura-ku Michishita 3-35, Nagoya, Aichi, Japan

    Koji Fukata, Norihiro Yuasa, Eiji Takeuchi, Hideo Miyake, Hidemasa Nagai, Yuichiro Yoshioka & Kanji Miyata

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  1. Koji Fukata
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  2. Norihiro Yuasa
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  3. Eiji Takeuchi
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Correspondence to Koji Fukata.

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Fukata, K., Yuasa, N., Takeuchi, E. et al. Clinical and prognostic differences between surgically resected right-sided and left-sided colorectal cancer. Surg Today 50, 267–274 (2020). https://doi.org/10.1007/s00595-019-01889-4

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  • DOI: https://doi.org/10.1007/s00595-019-01889-4

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