Efficacy of three-drug induction chemotherapy followed by preoperative chemoradiation in patients with localized gastric adenocarcinoma (GAC).

Authors

Dilsa Mizrak Kaya

Dilsa Mizrak Kaya

The University of Texas MD Anderson Cancer Center, Houston, TX

Dilsa Mizrak Kaya , Graciela M. Nogueras-Gonzalez , Prajnan Das , Mariela A. Blum Murphy , Fatemeh Ghazanfari Amlashi , Jane Elizabeth Rogers , Irene Thomas , Namita Shanbhag , Jeffrey H Lee , Manoop S. Bhutani , Brian Weston , Bruce D. Minsky , Aurelio Aurelio Matamoros Jr., Tara L. Sagebiel , Catherine E Devine , Jeannelyn Estrella , Brian D. Badgwell , Jaffer A. Ajani

Organizations

The University of Texas MD Anderson Cancer Center, Houston, TX, University of Texas MD Anderson Cancer Center, Houston, TX, Department of Pharmacy Clinical Programs, The University of Texas MD Anderson Cancer Center, Houston, TX, The University of Chicago Medical Center, Chicago, IL

Research Funding

Other

Background: Preoperative induction chemotherapy followed by chemoradiation yields better R0 resection rates, pathologic complete response (pCR) rates and improved survival for localized GAC.Previous studies with two-drug induction chemotherapy showed 70-80% R0 resection rates and 20-30% pCR rates. We report the effect of three-drug induction chemotherapy on a large cohort of localized GAC patients. Methods: We identified 97 patients with localized GAC who received three-drug induction chemotherapy followed by preoperative chemoradiation therapy. We assessed various endpoints (overall survival [OS], recurrence-free survival [RFS], R0 resection and pCR rate). Results: The median follow-up time was 3.5 years (range; 0.4-16.7). Most of the patients were men (60.8%) and the median age was 60 years (range; 21-89). The induction chemotherapy regimen was a fluoropyrimidine and a platinum compound (cisplatin or oxaliplatin) with a taxane (docetaxel or paclitaxel) for 95% of patients. Seventy-three (75%) out of 97 patients underwent planned surgery. R0 resection and pCR rate were 93% and 21%, respectively. Pathologic partial response (< 50% residual carcinoma) rate was 50.7%. The median OS was 6.43 years (95% Cl 3.27-12.36) for the entire cohort and 11.1 years (95% Cl 7.1-not estimable) for patients that underwent surgery. The estimated 2- and 5-year OS rates were 72% (95% CI 62-80) and 54% (95% CI 43-64) for the entire cohort and 83% (95% CI 72-91) and 66% (95% CI 53-76) for patients that underwent surgery. Pathological lesser stage (stage I/II vs. stage III/IV) (p = 0.001) and R0 resection (p = 0.019) were independently associated with longer RFS in the multivariate analysis. Conclusions: Our data show that three-drug combination is feasible without providing substantial advantage in this setting of preoperative induction chemotherapy followed by chemoradiation and surgery.

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Abstract Details

Meeting

2019 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 37, 2019 (suppl 4; abstr 106)

DOI

10.1200/JCO.2019.37.4_suppl.106

Abstract #

106

Poster Bd #

J16

Abstract Disclosures