Converting borderline-resectable, locally-advanced esophageal carcinoma to resectability with neoadjuvant chemoradiotherapy.

Authors

null

Zachary D. Horne

University of Pittsburgh Cancer Institute, Pittsburgh, PA

Zachary D. Horne , Weijing Sun , Michael K. Gibson , Arjun Pennathur , James D. Luketich , Brian J Karlovits , Dwight Earl Heron , Joel S. Greenberger

Organizations

University of Pittsburgh Cancer Institute, Pittsburgh, PA, University of Pittsburgh, Division of Hematology-Oncology, Pittsburgh, PA, Case Comprehensive Cancer Center, University Hospital of Cleveland Medical Center, Cleveland, OH, University of Pittsburgh Physicians Department of Cardiothoracic Surgery, Pittsburgh, PA, University of Pittsburgh, Department of Cardiothoracic Surgery, Pittsburgh, PA, UPMC Cancer Center, Pittsburgh, PA, University of Pittsburgh Medical Center, Pittsburgh, PA, University of Pittsburgh Medical Center Cancer Pavilion, Pittsburgh, PA

Research Funding

Other

Background: Treatment of T3-4/N+ esophageal cancer is challenging. Outcomes are suboptimal and patterns of care are not well defined for borderline-resectable esophageal cancer (BREC). We present our institutional experience using preoperative chemoradiotherapy (CRT) in the management of BREC. Methods: We identified 67 patients with T3-4/N+ BREC who were treated with concurrent CRT between 2009 and 2014. Survival was calculated with Kaplan-Meier curves and cohort comparisons were made with log-rank test and Cox regression. Results: We treated 67 patients (81% males, median age 61 years, and KPS of 80), primarily with T3N2 disease. Median follow-up was 16 months. The most common CRT regimen was 58.8Gy in 28 fractions with carboplatin and paclitaxel. Median survival was 16.5 months. Forty two (62.7%) patients underwent minimally invasive Ivor-Lewis esophagectomy within 100 days of CRT. Resected patients had a median survival of 30.6 vs. 6.4 months without surgery (p<.001). Pathologic complete response and pN0 was 30.0% and 59.5%, respectively. Acute grade 3+ toxicity was seen in 34.3% and late grade 3+ toxicity in 49.3%. Three patients (4.5%) died during CRT or before surgery. Predictors of overall survival (OS) on univariate analysis included age, KPS, male gender, absence of radiographic progression and surgical resection (all p<.05). Surgery remained significant on multivariate analysis (HR 0.215 [95%CI .114-.408, p<.001]). For resected patients, survival was predicted by positive margins, pathologic N stage, and number of positive nodes (all p<.05). The only predictor of OS on multivariate analysis was pathologic N stage, with actuarial 1- and 2-year OS for pN0 vs. pN+ of 96.2%/73.1% vs 53.3%/40.0% (p=.001). pN+ patients receiving adjuvant chemotherapy (53.3%) had improved survival of 26.7 vs 8.3 months without (p=.023). Conclusions: Preoperative CRT enabled a significant proportion of patients with BREC to proceed with a potentially curative resection. Further investigation with careful patient selection is warranted in incorporating a trimodality strategy to optimize outcomes and better define a treatment algorithm for this complex cohort of patients.

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Abstract Details

Meeting

2017 Gastrointestinal Cancers Symposium

Session Type

Poster Session

Session Title

Poster Session A: Cancers of the Esophagus and Stomach

Track

Cancers of the Esophagus and Stomach

Sub Track

Multidisciplinary Treatment

Citation

J Clin Oncol 35, 2017 (suppl 4S; abstract 160)

DOI

10.1200/JCO.2017.35.4_suppl.160

Abstract #

160

Poster Bd #

L8

Abstract Disclosures

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