How well does pathologic stage predict survival for esophageal adenocarcinoma after neoadjuvant therapy?

Abstract:

BACKGROUND:Cancer staging systems are designed to predict survival and stratify patients. The 7(th) edition of the American Joint Commission on Cancer (AJCC7) staging system for esophageal cancer was modeled using survival data on patients who underwent esophagectomy without induction or adjuvant therapy. In the United States, the standard of care for patients with locally advanced tumors often includes neoadjuvant therapy. The prognostic value of the pathologic stage for these patients is unknown. METHODS:Data from the Surveillance Epidemiology and End Results (SEER) were used to identify 1,243 patients with adenocarcinoma of the esophagus who underwent surgery after neoadjuvant therapy from 1988-2009. Included in the analysis were pathologically-staged, non-metastatic patients who had radiation as part of their neoadjuvant therapy. The AJCC7 staging system and an alternate system were modeled using Kaplan-Meier survival methods. The two systems were compared using log-rank chi-squared statistics, with large chi-squared values indicating accuracy in survival prediction. RESULTS:The AJCC staging system was able to predict survival for patients who had neoadjuvant therapy (P<0.001, chi-squared =81.8); however, there was little distinction between stage subgroups. Patients with neoadjuvant radiotherapy had improved survival for pathologic stage II and III disease. An alternative, simpler staging system was better able to stratify patients with neoadjuvant therapy (P<0.001, chi-squared =100.5). CONCLUSIONS:The current AJCC staging system is able to predict survival in esophageal adenocarcinoma patients undergoing neoadjuvant therapy, however, there is less distinction among stage subgroups. An alternative, simpler stage grouping may better stratify patients receiving neoadjuvant therapy.

journal_name

J Thorac Dis

authors

Kim JY,Nelson RA,Kim J,Raz D

doi

10.3978/j.issn.2072-1439.2015.04.30

subject

Has Abstract

pub_date

2015-04-01 00:00:00

pages

734-9

issue

4

eissn

2072-1439

issn

2077-6624

pii

jtd-07-04-734

journal_volume

7

pub_type

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