Literature DB >> 17290076

Pathologic complete response may not represent the optimal surrogate for survival after preoperative therapy for esophageal cancer.

A William Blackstock1, Mabea Aklilu, James Lovato, Michael R Farmer, Girish Mishra, Susan A Melin, Timothy Oaks, Kim Geisinger, Edward A Levine.   

Abstract

BACKGROUND: We designed a phase II trial to examine the benefit of preoperative hyperfractionated radiation therapy (XRT) and concurrent chemotherapy for patients with locally advanced esophageal cancer (LAEC).
AIM OF STUDY: The pathologic complete response (pCR) was the primary endpoint to estimate efficacy.
METHODS: Twenty-three patients with LAEC received twice-daily XRT during wk 1 and 5 and once-daily XRT during wk 2-4 (59 Gy). Cisplatin (100 mg/m(2)) was given on d 1, while 5-fluorouracil (1000 mg/m(2)) was given by continuous infusion the first and fifth weeks of the XRT.
RESULTS: The pCR for the 19 patients undergoing esophagectomy was 16%. The study was closed at the interim analysis having not met the required minimum pCR rate of 20%. Hematologic toxicities consisted of grades III and IV neutropenia observed in 33% and 14% of patients, respectively. Grade III nausea and vomiting was seen in 38% of patients. One grade V pulmonary toxicity occurred. The median survival was 44.6 mo with 65% of patients alive at 2 yr.
CONCLUSIONS: The pCR rate in this trial did not meet the predetermined statistical minimum. With the encouraging 2-yr survival, it is not clear that pCR is a reliable surrogate endpoint to discern treatment efficacy.

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Year:  2006        PMID: 17290076     DOI: 10.1385/IJGC:37:1:7

Source DB:  PubMed          Journal:  Int J Gastrointest Cancer        ISSN: 1537-3649


  20 in total

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