Retrospective analysis of neoadjuvant chemoradiotherapy for esophageal cancer: The Knight Cancer Institute experience.

Authors

null

Faisal A Siddiqui

Knight Cancer Institute, Oregon Health and Science University, Portland, OR

Faisal A Siddiqui , James P. Dolan , John G. Hunter , Miriam A. Douthit , Lisa M. Bloker , John M Holland , Charles R. Thomas Jr.

Organizations

Knight Cancer Institute, Oregon Health and Science University, Portland, OR, Oregon Health and Science University, Portland, OR, Oregon Health and Science University Knight Cancer Institute, Portland, OR

Research Funding

No funding sources reported

Background: Neoadjuvant chemoradiotherapy (NAT) followed by esophagectomy has been established as standard of care for early stage (II – III), resectable esophageal cancer (EC). Patients (pts) treated with NAT are more likely to be downstaged and have a complete (R0) resection. Additionally, pts with aggressive disease are more likely to progress during NAT and, consequently, avoid unnecessary surgery. The aim of the current report was to analyze the outcomes of trimodality therapy at the Knight Cancer Institute. Methods: A retrospective study of 124 pts who underwent NAT followed by esophagectomy for EC from 1999-2010 at our institution was performed. All pts were initially staged by imaging (EUS, CT and/or PET imaging) prior to commencing treatment. After esophagectomy, pathological staging was compared to initial staging to determine the effect of NAT. Results: There were 25 women and 99 men. Initial staging is shown in the table below. Patients received cisplatin, oxaliplatin or carboplatin with 5-FU plus concurrent radiotherapy (RT). RT total dose of 45 Gy to the tumor and regional nodes was given in 1.8 Gy daily fractions, followed by a boost to the tumor for final dose 50.4-54 Gy. 27 (21.8%) of the pts had a pathologic complete response. Additionally, 54 (43.6%) pts were downstaged by chemoradiation. Of the pts that had complete remission or were downstaged, pre-treatment clinical stage was Stage II (22 pts), Stage III (55 pts), and Stage IVa (4 pts). Conclusions: NAT was effective in complete remission or downstaging of two-thirds (81) pts, including 4 pts that were initially unresectable (Stage IVa) and successfully underwent subsequent esophagectomy. As has been shown previously, NAT is effective for downstaging prior to esophagectomy making it more likely that pts will undergo R0 resection. This study also demonstrated that some pts with clinically unresectable tumors could undergo successful esophagectomy after NAT.


Initial clinical stage No. of patients (%) Change from clinical staging to pathologic staging No. of patients (%)

I 2 (1.6%) No evidence of disease 27 (21.8%)
II 43 (34.7%) Downstaged 54 (43.6%)
III 74 (59.7%) Unchanged 31 (25%)
IVa 5 (4%) Upstaged 12 (9.7%)

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Abstract Details

Meeting

2012 Gastrointestinal Cancers Symposium

Session Type

Poster Session

Session Title

General Poster Session A: Cancers of the Esophagus and Stomach

Track

Cancers of the Esophagus and Stomach

Sub Track

Multidisciplinary Treatment

Citation

J Clin Oncol 30, 2012 (suppl 4; abstr 126)

DOI

10.1200/jco.2012.30.4_suppl.126

Abstract #

126

Poster Bd #

C42

Abstract Disclosures