Clinical implication of negative conversion of predicted circumferential resection margin status after preoperative chemoradiotherapy for locally advanced rectal cancer

Nam Kwon Lee, Chul Yong Kim, Young Je Park, Dae Sik Yang, Won Sup Yoon, Seon Hahn Kim, Jin Kim

    Research output: Contribution to journalArticlepeer-review

    7 Citations (Scopus)

    Abstract

    Objective To evaluate the prognostic implication of the negative conversion of predicted circumferential resection margin status before surgery in patients with locally advanced rectal cancer with predicted circumferential resection margin involvement. Methods Thirty-eight patients (28 men, 10 women; median age, 61 years; age range, 39-80 years) with locally advanced rectal cancer with predicted circumferential resection margin involvement who underwent preoperative chemoradiotherapy followed by radical surgery were analyzed. Involvement of the circumferential resection margin was predicted on the basis of pre- and post-chemoradiotherapy magnetic resonance imaging. The primary endpoints were 3-year local recurrence-free survival and overall survival. Results The median follow-up time was 41.1 months (range, 13.9-85.2 months). The negative conversion rate of predicted circumferential resection margin status after preoperative chemoradiotherapy was 65.8%. Patients who experienced negative conversion of predicted circumferential resection margin status had a significantly higher 3-year local recurrence-free survival rate (100.0% vs. 76.9%; P = 0.013), disease-free survival rate (91.7% vs. 59.3%; P = 0.023), and overall survival rate (96.0% vs. 73.8%; P = 0.016) than those who had persistent circumferential resection margin involvement. Conclusions The negative conversion of the predicted circumferential resection margin status as predicted by magnetic resonance imaging will assist in individual risk stratification as a predictive factor for treatment response and survival before surgery. These findings may help physicians determine whether to administer more intense adjuvant chemotherapy or change the surgical plan for patients displaying resistance to preoperative chemoradiotherapy.

    Original languageEnglish
    Pages (from-to)245-249
    Number of pages5
    JournalEuropean Journal of Radiology
    Volume83
    Issue number2
    DOIs
    Publication statusPublished - 2014 Feb

    Keywords

    • Circumferential resection margin
    • Magnetic resonance imaging
    • Preoperative chemoradiotherapy
    • Rectal neoplasms

    ASJC Scopus subject areas

    • Radiology Nuclear Medicine and imaging

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