Maintenance therapy with capecitabine in patients with resected pancreatic adenocarcinoma after adjuvant therapy.

Authors

null

Xuezhong Yang

Georgetown University Hospital Lombardi Cancer Center, Washington, DC

Xuezhong Yang , Christina Sing-Ying Wu , Jimmy J. Hwang , Benjamin Weinberg , Michael J. Pishvaian , Aiwu Ruth He , John Marshall

Organizations

Georgetown University Hospital Lombardi Cancer Center, Washington, DC, Lombardi Comprehensive Cancer Center, Georgetown University, Washington, DC, Georgetown University Hospital, Washington, DC

Research Funding

No funding sources reported

Background: The 5-year disease free survival of pancreatic adenocarcinoma (PAC) with surgery alone is below 10%, and adjuvant chemotherapy increases that to about 20%. The original GITSG adjuvant study demonstrating a survival benefit compared to surgery could be attributed to the use of 2-years of weekly IV bolus 5FU, and not chemoradiation. This hypothesis has not been tested since that trial. In theory, the prolonged exposure to therapy could maintain pressure on dormant cancer cells that may remain in G0 arrest, by attacking them as they infrequently enter G1/S phase. To evaluate this hypothesis, we retrospectively evaluated our patient (pts) who were treated with maintenance capecitabine (cape). Methods: Pts in the Georgetown University Hospital/Lombardi Cancer Center electronic medical record database since Oct 2007 were sought for PAC that were resected with curative intent, received standard adjuvant chemotherapy with or without chemoradiation, and received maintenance cape for at least 2 months. Results: Among 214 PAC pts that have been treated at our institution in this time, 21 pts met these criteria. Among the 21 pts, 1 was lost to follow up after moving overseas, and 20 pts were eligible for this analysis. 13 of the 20 pts had lymph node involvement at resection. Cape was usually given 1000mg orally twice a day, Monday through Friday following adjuvant therapy, for an indefinite period, most often two years. Pts received cape for median duration of 12.5 months (2 to 24 months), and the median followup duration was 33 months (16 to 78 months). The median overall survival (OS) for the 20 analyzed patients was 48 months. The 2 year OS was 94%, and 5 year OS was 40%. The median recurrence free survival (RFS) was 39 months. The 2 year RFS was 67%, and the 5 year RFS was 25%. Common toxicities were mild hand-and-foot syndrome and fatigue. 4 pts discontinued cape due to toxicities: febrile neutropenia, severe fatigue, weight loss and diarrhea respectively. Conclusions: Cape maintenance therapy following adjuvant chemotherapy in resected PAC is associated with a promising higher overall survival and PFS compared to historical data, and this approach should be further studied in a randomized controlled study.

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Abstract Details

Meeting

2012 Gastrointestinal Cancers Symposium

Session Type

Poster Session

Session Title

General Poster Session B: Cancers of the Pancreas, Small Bowel, and Hepatobiliary Tract

Track

Cancers of the Pancreas, Small Bowel, and Hepatobiliary Tract

Sub Track

Multidisciplinary Treatment

Citation

J Clin Oncol 30, 2012 (suppl 4; abstr 333)

DOI

10.1200/jco.2012.30.4_suppl.333

Abstract #

333

Poster Bd #

E17

Abstract Disclosures

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