Cancer Research and Treatment

Original Article

Gastrointestinal cancer

Risk Stratification of Pancreatic Ductal Adenocarcinoma Patients Undergoing Curative-Intent Surgery after Neoadjuvant Therapy: Hyun Kyung Yang, Mi-Suk Park, Kyunghwa Han, Geonsik Eom, Yong Eun Chung, Jin-Young Choi, Seungmin Bang, Chang Moo Kang, Jinsil Seong, Myeong-Jin Kim; Cancer Res Treat. 2024;56(1):247-258. Published online August 22, 2023; DOI: https://doi.org/10.4143/crt.2023.586

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Purpose
Clinical prognostic criteria using preoperative factors were not developed for post–neoadjuvant therapy (NAT) surgery of pancreatic ductal adenocarcinoma (PDAC). We aimed to identify preoperative factors associated with overall survival (OS) in PDAC patients who underwent post-NAT curative-intent surgery and develop risk stratification criteria.
Materials and Methods
Consecutive PDAC patients who underwent post-NAT curative-intent surgeries between 2007 and 2020 were retrospectively analyzed. Demographic, laboratory, surgical, and histopathologic variables were collected. Baseline, preoperative, and interval changes of computed tomography (CT) findings proposed by the Society of Abdominal Radiology and the American Pancreatic Association were analyzed. Cox proportional hazard analysis was used to select preoperative variables associated with OS. We developed risk stratification criteria composed of the significant preoperative variables, i.e., post-NAT response criteria. We compared the discrimination performance of post-NAT response criteria with that of post-NAT pathological (yp) American Joint Cancer Committee TNM staging system.
Results
One hundred forty-five PDAC patients were included. Stable or increased tumor size on CT (hazard ratio [HR], 2.58; 95% confidence interval [CI], 1.58 to 4.21; p < 0.001) and elevated preoperative carbohydrate antigen 19-9 (CA19-9) level (HR, 1.98; 95% CI, 1.11 to 3.55; p=0.021) were independent factors of OS. The OS of the patient groups stratified by post-NAT response criteria which combined changes in tumor size and CA19-9 showed significant difference (p < 0.001). Such stratification was comparable to ypTNM staging in discrimination performance (difference of C-index, 0.068; 95% CI, –0.012 to 0.142).
Conclusion
“Any degree of decrease in tumor size on CT” and CA19-9 normalization or staying normal were independent favorable factors of OS. The combination of the two factors discriminated OS comparably to ypTNM staging.

Citations

Citations to this article as recorded by

Prognostic factors in localized pancreatic ductal adenocarcinoma after neoadjuvant therapy and resection: a systematic review and meta-analysis
Ammar A Javed, Alyssar Habib, Omar Mahmud, Asad Saulat Fatimi, Mahip Grewal, Nabiha Mughal, Jin He, Christopher L Wolfgang, Lois Daamen, Marc G Besselink
JNCI: Journal of the National Cancer Institute.2025; 117(5): 840. CrossRef

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