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Shimizu T, Maeda S, Link J, Deranteriassian A, Premji A, Verma A, Chervu N, Park J, Girgis M, Benharash P, Hines J, Wainberg Z, Wolfgang C, Burns W, Yu J, Fernandez-Del Castillo C, Lillemoe K, Ferrone C, Donahue T. Clinical and pathological factors associated with survival in patients with pancreatic cancer who receive adjuvant therapy after neoadjuvant therapy: A retrospective multi-institutional analysis. Surgery 2024; 175:1377-1385. [PMID: 38365548 DOI: 10.1016/j.surg.2024.01.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 12/29/2023] [Accepted: 01/08/2024] [Indexed: 02/18/2024]
Abstract
BACKGROUND Neoadjuvant therapy is being increasingly used for patients with pancreatic cancer. The role of adjuvant therapy in these patients is unclear. The purpose of this study was to identify clinical and pathologic characteristics that are associated with longer overall survival in patients with pancreatic cancer who receive adjuvant therapy after neoadjuvant therapy. METHODS This study was conducted using multi-institutional data. All patients underwent surgery after at least 1 cycle of neoadjuvant therapy for pancreatic cancer. Patients who died within 3 months after surgery and were known to have distant metastasis or macroscopic residual disease were excluded. Mann-Whitney U test, χ2 analysis, Kaplan-Meier plot, and univariate and multivariate Cox regression analysis were performed as statistical analyses. RESULTS In the present study, 529 patients with resected pancreatic cancer after neoadjuvant therapy were reviewed. For neoadjuvant therapy, 177 (33.5%) patients received neoadjuvant chemotherapy, and 352 (66.5%) patients received neoadjuvant chemoradiotherapy. The median duration of neoadjuvant therapy was 7.0 months (interquartile range, 5.0-8.7). Patients were followed for a median of 23.0 months after surgery. Adjuvant therapy was administered to 297 (56.1%) patients and was not associated with longer overall survival for the entire cohort (24 vs 22 months, P = .31). Interaction analysis showed that adjuvant therapy was associated with longer overall survival in patients who received less than 4 months neoadjuvant therapy (hazard ratio 0.40; 95% confidence interval 0.17-0.95; P = .03) or who had microscopic margin positive surgical resections (hazard ratio 0.56; 95% confidence interval 0.33-0.93; P = .03). CONCLUSION In this retrospective study, there was a survival benefit associated with adjuvant therapy for patients who received less than 4 months of neoadjuvant therapy or had microscopic positive margins.
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Affiliation(s)
- Takayuki Shimizu
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Shimpei Maeda
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Jason Link
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | | | - Alykhan Premji
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Arjun Verma
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Nikhil Chervu
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Joon Park
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Mark Girgis
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Peyman Benharash
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Joe Hines
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Zev Wainberg
- Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Christopher Wolfgang
- Department of Surgery, The Johns Hopkins University School of Medicine, Baltimore, MD
| | - William Burns
- Department of Surgery, The Johns Hopkins University School of Medicine, Baltimore, MD
| | - Jun Yu
- Department of Surgery, The Johns Hopkins University School of Medicine, Baltimore, MD
| | | | - Keith Lillemoe
- Department of Surgery, Massachusetts General Hospital, Boston, MA
| | - Cristina Ferrone
- Department of Surgery, Massachusetts General Hospital, Boston, MA
| | - Timothy Donahue
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA.
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