Impact of patient characteristics and treatment patterns on outcomes in potentially resectable pancreatic cancer (PC).

Authors

null

Andrew Steinmetz

University of Cincinnati College of Medicine, Cincinnati, OH;

Andrew Steinmetz , Sameer H. Patel , Gregory C. Wilson , Jeffrey J. Sussman , Olugbenga Olanrele Olowokure , Jordan Kharofa , Syed A. Ahmad , Davendra Sohal

Organizations

University of Cincinnati College of Medicine, Cincinnati, OH; , University of Cincinnati Medical Center, Cincinnati, OH; , University of Cincinnati Cancer Center, Cincinnati, OH; , University Of Cincinnati, Cincinnati, OH; , University of Cincinnati, Cincinnati, OH;

Research Funding

No funding received
None.

Background: Treatment of PC remains a challenge, with surgery being the mainstay of potentially curative therapy. Even after surgical resection, however, many patients experience recurrence. There has been a shift toward treating PC as a systemic disease from diagnosis with neoadjuvant chemotherapy (nCT) or chemoradiation (nCRT). This study examines characteristics of real-world patients who were deemed to have resectable (R) or borderline resectable (BR) disease, and how they relate to overall survival (OS). Methods: This is a retrospective analysis of patients in an academic health system who presented for initiation of treatment for PC staged as R or BR. Descriptive data on patient characteristics, performance status (PS), laboratory values, neoadjuvant therapies, recurrence, and mortality were obtained. OS was evaluated using Kaplan-Meier analysis and log-rank tests. Two-sided p-values were calculated. Results: From electronic records at the University of Cincinnati, 129 patients were identified. Median age was 66 with baseline ECOG PS of mostly 0 (86, 67%) or 1 (40, 31%). Primary tumor site was most commonly head of pancreas (104, 81%). Of 129, 55 (43%) patients received surgery upfront; the rest received neoadjuvant therapy (39 nCRT, 35 nCT) with gemcitabine (68%) or 5-fluorouracil (32%) containing regimens. Of those receiving nCRT/nCT, 36 (49%) went on to resection; the rest experienced progression (27, 36%) or toxicities (11, 15%) including death. Of 129, 92 (71%) have died, with median OS of 20.1 months (95% CI 16.4 - 25.0) for the full cohort. On adjusted multivariable analysis, the following were associated with worse OS: failure to undergo resection (HR 5.65, 95% CI 3.17 - 10.09, p<0.0001); receiving <3 cycles nCT (HR 3.00, 95% CI 1.38 - 6.53, p=0.006); baseline CA 19-9 >100 (HR 2.73, 95% CI 1.52 - 4.90, p=0.001); BR disease (HR 2.20, 95% CI 1.27 – 3.81, p=0.005); not receiving RT (HR 1.91, 95% CI 1.04 - 3.53, p=0.038). Regimen choice was not associated with OS. Conclusions: In this real-world PC dataset, surgical resection remains the mainstay of curative therapy. Inadequate nCRT/nCT lead to suboptimal outcomes, likely reflecting patient physiology and disease biology effects. Future trials should focus on maximizing neoadjuvant therapy with the goal of resection.

Results of multivariate analysis of factors influencing OS in the pooled cohort.

ParameterChi-SquareP-valueHR95% HR CI
CA 19-9 Normal1.120.291.500.71-3.19
CA 19-9 >10011.36<0.012.731.52-4.90
BR Disease7.93<0.012.201.27-3.81
Not Undergoing Resection34.34<0.015.653.17-10.09
<3 cycles nCT7.620.013.001.38-6.53
Not Receiving nRT4.290.041.911.04-3.53

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Abstract Details

Meeting

2023 ASCO Gastrointestinal Cancers Symposium

Session Type

Poster Session

Session Title

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

Track

Pancreatic Cancer,Hepatobiliary Cancer,Neuroendocrine/Carcinoid,Small Bowel Cancer

Sub Track

Patient-Reported Outcomes and Real-World Evidence

Clinical Trial Registration Number

Add this

Citation

J Clin Oncol 41, 2023 (suppl 4; abstr 681)

DOI

10.1200/JCO.2023.41.4_suppl.681

Abstract #

681

Poster Bd #

J6

Abstract Disclosures

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