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Jethwa KR, Kim E, Berlin J, Anker CJ, Tchelebi L, Abood G, Hallemeier CL, Jabbour S, Kennedy T, Kumar R, Lee P, Sharma N, Small W, Williams V, Russo S. Executive Summary of the American Radium Society Appropriate Use Criteria for Neoadjuvant Therapy for Nonmetastatic Pancreatic Adenocarcinoma: Systematic Review and Guidelines. Am J Clin Oncol 2024; 47:185-199. [PMID: 38131628 DOI: 10.1097/coc.0000000000001076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
For patients with locoregionally confined pancreatic ductal adenocarcinoma (PDAC), margin-negative surgical resection is the only known curative treatment; however, the majority of patients are not operable candidates at initial diagnosis. Among patients with resectable disease who undergo surgery alone, the 5-year survival remains poor. Adjuvant therapies, including systemic therapy or chemoradiation, are utilized as they improve locoregional control and overall survival. There has been increasing interest in the use of neoadjuvant therapy to obtain early control of occult metastatic disease, allow local tumor response to facilitate margin-negative resection, and provide a test of time and biology to assist with the selection of candidates most likely to benefit from radical surgical resection. However, limited guidance exists regarding the relative effectiveness of treatment options. In this systematic review, the American Radium Society multidisciplinary gastrointestinal expert panel convened to develop Appropriate Use Criteria evaluating the evidence regarding neoadjuvant treatment for patients with PDAC, including surgery, systemic therapy, and radiotherapy, in terms of oncologic outcomes and quality of life. The evidence was assessed using the Population, Intervention, Comparator, Outcome, and Study (PICOS) design framework and "Preferred Reporting Items for Systematic Reviews and Meta-analyses" 2020 methodology. Eligible studies included phases 2 to 3 trials, meta-analyses, and retrospective analyses published between January 1, 2012 and December 30, 2022 in the Ovid Medline database. A summary of recommendations based on the available literature is outlined to guide practitioners in the management of patients with PDAC.
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Affiliation(s)
- Krishan R Jethwa
- Department of Radiation Oncology, Mayo Clinic College of Medicine, Rochester, MN
| | - Ed Kim
- Department of Radiation Oncology, University of Washington, Seattle, WA
| | - Jordan Berlin
- Department of Medicine, Division of Hematology-Oncology, Vanderbilt-Ingram Cancer Center, Nashville, TN
| | - Christopher J Anker
- Department of Radiation Oncology, University of Vermont Larner College of Medicine, Burlington, VT
| | - Leila Tchelebi
- Department of Radiation Oncology, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Hempstead
| | | | | | | | - Timothy Kennedy
- Department of Surgery, Rutgers Cancer Institute, New Brunswick, NJ
| | - Rachit Kumar
- Department of Radiation Oncology, Johns Hopkins Sidney Kimmel Comprehensive Cancer Center, Sibley Memorial Hospital, Washington DC
| | - Percy Lee
- Department of Radiation Oncology, City of Hope National Medical Center, Los Angeles, CA
| | - Navesh Sharma
- Department of Radiation Oncology, WellSpan Cancer Center, York, PA
| | - William Small
- Department of Radiation Oncology, Loyola University Stritch School of Medicine, Maywood, IL
| | - Vonetta Williams
- Department of Radiation Oncology, Memorial Sloan Kettering, New York, NY
| | - Suzanne Russo
- Department of Radiation Oncology, University Hospitals Cleveland, Case Western Reserve University School of Medicine, Cleveland, OH
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Kolbeinsson HM, Chandana S, Wright GP, Chung M. Pancreatic Cancer: A Review of Current Treatment and Novel Therapies. J INVEST SURG 2023; 36:2129884. [PMID: 36191926 DOI: 10.1080/08941939.2022.2129884] [Citation(s) in RCA: 65] [Impact Index Per Article: 65.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Pancreatic cancer is one of the leading causes for cancer-related deaths in the United States. Majority of patients present with unresectable or metastatic disease. For those that present with localized disease, a multidisciplinary approach is necessary to maximize survival and optimize outcomes. The quality and safety of surgery for pancreatic cancer have improved in recent years with increasing adoption of minimally invasive techniques and surgical adjuncts. Systemic chemotherapy has also evolved to impact survival. It is now increasingly being utilized in the neoadjuvant setting, often with concomitant radiation. Increased utilization of genomic testing in metastatic pancreatic cancer has led to better understanding of their biology, thereby allowing clinicians to consider potential targeted therapies. Similarly, targeted agents such as PARP inhibitors and immune checkpoint- inhibitors have emerged with promising results. In summary, pancreatic cancer remains a disease with poor long-term survival. However, recent developments have led to improved outcomes and have changed practice in the past decade. This review summarizes current practices in pancreatic cancer treatment and the milestones that brought us to where we are today, along with emerging therapies.
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Affiliation(s)
- Hordur Mar Kolbeinsson
- Spectrum Health General Surgery Residency, Grand Rapids, Michigan, USA.,Department of Surgery, Michigan State University College of Human Medicine, Grand Rapids, Michigan, USA
| | - Sreenivasa Chandana
- Department of Surgery, Michigan State University College of Human Medicine, Grand Rapids, Michigan, USA.,Cancer and Hematology Centers of Western Michigan, PC, Grand Rapids, Michigan, USA
| | - G Paul Wright
- Spectrum Health General Surgery Residency, Grand Rapids, Michigan, USA.,Department of Surgery, Michigan State University College of Human Medicine, Grand Rapids, Michigan, USA.,Division of Surgical Oncology, Spectrum Health Medical Group, Grand Rapids, Michigan, USA
| | - Mathew Chung
- Spectrum Health General Surgery Residency, Grand Rapids, Michigan, USA.,Department of Surgery, Michigan State University College of Human Medicine, Grand Rapids, Michigan, USA.,Division of Surgical Oncology, Spectrum Health Medical Group, Grand Rapids, Michigan, USA
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3
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Hassan MS, Awasthi N, Ponna S, von Holzen U. Nab-Paclitaxel in the Treatment of Gastrointestinal Cancers-Improvements in Clinical Efficacy and Safety. Biomedicines 2023; 11:2000. [PMID: 37509639 PMCID: PMC10377238 DOI: 10.3390/biomedicines11072000] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 07/03/2023] [Accepted: 07/10/2023] [Indexed: 07/30/2023] Open
Abstract
Taxanes (paclitaxel and docetaxel) are one of the most useful classes of anticancer drugs. Taxanes are highly hydrophobic; therefore, these drugs must be dissolved in organic solvents (polysorbate or Cremophor EL), which contribute to their toxicities. To reduce this toxicity and to enhance their efficacy, novel formulations have been developed. Nanoparticle albumin-bound paclitaxel (nab-paclitaxel) is an albumin-stabilized, Cremophor-free, and water-soluble nanoparticle formulation of paclitaxel. Nab-paclitaxel has better solubility and less infusion-associated toxicity compared to solvent-based paclitaxel. Additionally, nab-paclitaxel can be given at higher doses and concentrations compared with solvent-based paclitaxel. Based on its superior clinical efficacy and safety profile, nab-paclitaxel received FDA approval for metastatic breast cancer (2008) and NSCLC (2011). Among gastrointestinal cancers, it is now approved in the USA for treating patients with metastatic adenocarcinoma of the pancreas as first-line therapy in combination with gemcitabine. Furthermore, several clinical trials have suggested the potential efficacy of nab-paclitaxel as a single agent or in combination with other agents for the treatment of metastatic esophageal, gastric, bowel, and biliary tract cancers. Nab-paclitaxel has been demonstrated to have greater overall response rates (ORR) with enhanced progression-free survival (PFS), overall survival (OS) and a superior safety profile with fewer adverse effects in patients with gastrointestinal tract cancers. This review summarizes the advantages associated with nab-paclitaxel-based regimens in terms of improving clinical efficacy and the safety profile in upper gastrointestinal cancer.
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Affiliation(s)
- Md Sazzad Hassan
- Department of Surgery, Indiana University School of Medicine, South Bend, IN 46617, USA
- Harper Cancer Research Institute, South Bend, IN 46617, USA
| | - Niranjan Awasthi
- Department of Surgery, Indiana University School of Medicine, South Bend, IN 46617, USA
- Harper Cancer Research Institute, South Bend, IN 46617, USA
| | - Saisantosh Ponna
- Department of Chemistry and Biochemistry, University of Notre Dame, South Bend, IN 46556, USA
| | - Urs von Holzen
- Department of Surgery, Indiana University School of Medicine, South Bend, IN 46617, USA
- Harper Cancer Research Institute, South Bend, IN 46617, USA
- Goshen Center for Cancer Care, Goshen, IN 46526, USA
- Department of Surgery, University of Basel School of Medicine, 4001 Basel, Switzerland
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Ono Y, Inoue Y, Ito H, Sasaki T, Takeda T, Ozaka M, Sasahira N, Hiratsuka M, Matsueda K, Oba A, Sato T, Saiura A, Takahashi Y. Analysis of prognostic factors for borderline resectable pancreatic cancer after neoadjuvant chemotherapy: the importance of CA19-9 decrease in patients with elevated pre-chemotherapy CA19-9 levels. HPB (Oxford) 2023; 25:100-108. [PMID: 36280425 DOI: 10.1016/j.hpb.2022.09.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 07/09/2022] [Accepted: 09/28/2022] [Indexed: 12/12/2022]
Abstract
BACKGROUND Neoadjuvant chemotherapy (NAC) is widely used to treat borderline resectable pancreatic cancer. This study aimed to evaluate the serum carbohydrate antigen (CA)19-9 response, in association with survival, after four cycles of NAC-gemcitabine plus nab-paclitaxel. METHODS From 2015 to 2018, patients with borderline resectable pancreatic cancer were treated with NAC. Patients were stratified into two groups after excluding CA19-9 non-secretor: Group L (CA19-9 ≥2 and ≤500 U/mL) and Group H (CA19-9 >500 U/mL). The CA19-9 decrease during NAC was evaluated as a response of NAC and was assessed in association with survival concomitant with other prognosis factors. RESULTS Eighty-seven patients were evaluated (Group L: n = 43, Group H: n = 44). In intention-to-treat-based analysis, Group L exhibited significantly better progression-free survival (PFS) than Group H (median PFS: 24 vs 14months). In resection cohort, no correlation was detected between the CA19-9 decrease and survival in Group L. In Group H, the CA19-9 decrease ≤80% was associated with unfavorable survival in multivariate analysis [Hazard ratio: 4.738 (P = 0.007)]. CONCLUSION In patients with pre-treatment CA19-9 >500 U/mL, the CA19-9 decrease ≤80% was strongly associated with poor survival and new strategy should be reconsidered for these patients.
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Affiliation(s)
- Yoshihiro Ono
- Division of Hepatobiliary and Pancreatic Surgery, Cancer Institute Hospital, Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Yosuke Inoue
- Division of Hepatobiliary and Pancreatic Surgery, Cancer Institute Hospital, Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Hiromichi Ito
- Division of Hepatobiliary and Pancreatic Surgery, Cancer Institute Hospital, Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Takashi Sasaki
- Department of Hepato-Biliary-Pancreatic Medicine, Cancer Institute Hospital, Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Tsuyoshi Takeda
- Department of Hepato-Biliary-Pancreatic Medicine, Cancer Institute Hospital, Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Masato Ozaka
- Department of Hepato-Biliary-Pancreatic Medicine, Cancer Institute Hospital, Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Naoki Sasahira
- Department of Hepato-Biliary-Pancreatic Medicine, Cancer Institute Hospital, Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Makiko Hiratsuka
- Department of Diagnostic Imaging, Cancer Institute Hospital, Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Kiyoshi Matsueda
- Department of Diagnostic Imaging, Cancer Institute Hospital, Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Atsushi Oba
- Division of Hepatobiliary and Pancreatic Surgery, Cancer Institute Hospital, Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Takafumi Sato
- Division of Hepatobiliary and Pancreatic Surgery, Cancer Institute Hospital, Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Akio Saiura
- Division of Hepatobiliary and Pancreatic Surgery, Cancer Institute Hospital, Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Yu Takahashi
- Division of Hepatobiliary and Pancreatic Surgery, Cancer Institute Hospital, Japanese Foundation for Cancer Research, Tokyo, Japan.
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Tempero MA, Pelzer U, O'Reilly EM, Winter J, Oh DY, Li CP, Tortora G, Chang HM, Lopez CD, Bekaii-Saab T, Ko AH, Santoro A, Park JO, Noel MS, Frassineti GL, Shan YS, Dean A, Riess H, Van Cutsem E, Berlin J, Philip P, Moore M, Goldstein D, Tabernero J, Li M, Ferrara S, Le Bruchec Y, Zhang G, Lu B, Biankin AV, Reni M. Adjuvant nab-Paclitaxel + Gemcitabine in Resected Pancreatic Ductal Adenocarcinoma: Results From a Randomized, Open-Label, Phase III Trial. J Clin Oncol 2022; 41:2007-2019. [PMID: 36521097 PMCID: PMC10082313 DOI: 10.1200/jco.22.01134] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
PURPOSE This randomized, open-label trial compared the efficacy and safety of adjuvant nab-paclitaxel + gemcitabine with those of gemcitabine for resected pancreatic ductal adenocarcinoma (ClinicalTrials.gov identifier: NCT01964430 ). METHODS We assigned 866 treatment-naive patients with pancreatic ductal adenocarcinoma to nab-paclitaxel (125 mg/m2) + gemcitabine (1,000 mg/m2) or gemcitabine alone to one 30-40 infusion on days 1, 8, and 15 of six 28-day cycles. The primary end point was independently assessed disease-free survival (DFS). Additional end points included investigator-assessed DFS, overall survival (OS), and safety. RESULTS Two hundred eighty-seven of 432 patients and 310 of 434 patients completed nab-paclitaxel + gemcitabine and gemcitabine treatment, respectively. At primary data cutoff (December 31, 2018; median follow-up, 38.5 [interquartile range [IQR], 33.8-43 months), the median independently assessed DFS was 19.4 ( nab-paclitaxel + gemcitabine) versus 18.8 months (gemcitabine; hazard ratio [HR], 0.88; 95% CI, 0.729 to 1.063; P = .18). The median investigator-assessed DFS was 16.6 (IQR, 8.4-47.0) and 13.7 (IQR, 8.3-44.1) months, respectively (HR, 0.82; 95% CI, 0.694 to 0.965; P = .02). The median OS (427 events; 68% mature) was 40.5 (IQR, 20.7 to not reached) and 36.2 (IQR, 17.7-53.3) months, respectively (HR, 0.82; 95% CI, 0.680 to 0.996; P = .045). At a 16-month follow-up (cutoff, April 3, 2020; median follow-up, 51.4 months [IQR, 47.0-57.0]), the median OS (511 events; 81% mature) was 41.8 ( nab-paclitaxel + gemcitabine) versus 37.7 months (gemcitabine; HR, 0.82; 95% CI, 0.687 to 0.973; P = .0232). At the 5-year follow-up (cutoff, April 9, 2021; median follow-up, 63.2 months [IQR, 60.1-68.7]), the median OS (555 events; 88% mature) was 41.8 versus 37.7 months, respectively (HR, 0.80; 95% CI, 0.678 to 0.947; P = .0091). Eighty-six percent ( nab-paclitaxel + gemcitabine) and 68% (gemcitabine) of patients experienced grade ≥ 3 treatment-emergent adverse events. Two patients per study arm died of treatment-emergent adverse events. CONCLUSION The primary end point (independently assessed DFS) was not met despite favorable OS seen with nab-paclitaxel + gemcitabine.
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Affiliation(s)
- Margaret A. Tempero
- University of California, San Francisco, Helen Diller Family Comprehensive Cancer Center, San Francisco, CA
| | - Uwe Pelzer
- Charité-Universitätsmedizin Berlin, Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin Institute of Health, Berlin, Germany
| | | | - Jordan Winter
- Thomas Jefferson University Hospital, Philadelphia, PA
| | - Do-Youn Oh
- Seoul National University Hospital, Cancer Research Institute, Seoul National University College of Medicine, Seoul, South Korea
- Integrated Major in Innovative Medical Science, Seoul National University Graduate School, Seoul, South Korea
| | - Chung-Pin Li
- Division of Clinical Skills Training, Department of Medical Education, Taipei Veterans General Hospital, Taipei, Taiwan
- Division of Gastroenterology and Hepatology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
- School of Medicine, College of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Giampaolo Tortora
- Azienda Ospedaliera Universitaria, Verona, Italy
- Fondazione Policlinico Universitario Gemelli IRCCS, Rome, Italy
| | - Heung-Moon Chang
- Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Charles D. Lopez
- Oregon Health & Science University, Knight Cancer Institute, Portland, OR
| | | | - Andrew H. Ko
- University of California, San Francisco, Helen Diller Family Comprehensive Cancer Center, San Francisco, CA
| | - Armando Santoro
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy
- IRCCS Humanitas Research Hospital, Humanitas Cancer Center, Rozzano, Milan, Italy
| | - Joon Oh Park
- Division of Hematology/Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - Marcus S. Noel
- Division of Hematology/Oncology, Georgetown Lombardi Cancer Center, Washington, DC
| | - Giovanni Luca Frassineti
- Department of Medical Oncology, Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Meldola, Italy
| | - Yan-Shen Shan
- Department of Surgery, Institute of Clinical Medicine, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Andrew Dean
- Department of Medical Oncology, St John of God Subiaco Hospital, Subiaco, Western Australia, Australia
| | - Hanno Riess
- Charité-Universitätsmedizin Berlin, Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin Institute of Health, Berlin, Germany
| | - Eric Van Cutsem
- University Hospitals Gasthuisberg/Leuven and KU Leuven, Leuven, Belgium
| | | | - Philip Philip
- Karmanos Cancer Institute, Detroit, MI
- Henry Ford Cancer Institute, Detroit, MI
| | - Malcolm Moore
- Princess Margaret Hospital, Toronto, Ontario, Canada
| | - David Goldstein
- Nelune Cancer Center, Prince of Wales Hospital, University of New South Wales, Randwick, New South Wales, Australia
| | - Josep Tabernero
- Vall d'Hebron Hospital Campus and Institute of Oncology (VHIO), IOB-Quiron, UVic-UCC, Barcelona, Spain
| | | | - Stefano Ferrara
- Celgene Research SLU, a Bristol Myers Squibb Company, Boudry, Switzerland
| | - Yvan Le Bruchec
- Celgene Research SLU, a Bristol Myers Squibb Company, Boudry, Switzerland
| | | | - Brian Lu
- Bristol Myers Squibb, Princeton, NJ
| | - Andrew V. Biankin
- Wolfson Wohl Cancer Research Center, Institute of Cancer Sciences, University of Glasgow, Glasgow, United Kingdom
- West of Scotland Pancreatic Unit, Glasgow Royal Infirmary, Glasgow, United Kingdom
- South Western Sydney Clinical School, Faculty of Medicine, University of New South Wales, Liverpool, New South Wales, Australia
| | - Michele Reni
- IRCCS Ospedale San Raffaele Vita e Salute University, Milan, Italy
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Reddy AV, Hill CS, Zheng L, He J, Narang AK. A safety study of intraoperative radiation therapy following stereotactic body radiation therapy and multi-agent chemotherapy in the treatment of localized pancreatic adenocarcinoma: study protocol of a phase I trial. Radiat Oncol 2022; 17:173. [PMID: 36307845 PMCID: PMC9615352 DOI: 10.1186/s13014-022-02145-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 10/07/2022] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND Localized pancreatic adenocarcinoma carries a poor prognosis even after aggressive therapy. Up to 40% of patients may develop locoregional disease as the first site of failure. As such, there may be a role for intensification of local therapy such as radiation therapy. Radiation dose escalation for pancreatic cancer is limited by proximity of the tumor to the duodenum. However, the duodenum is removed during Whipple procedure, allowing the opportunity to dose escalate with intraoperative radiation therapy (IORT). Although prior studies have shown potential benefit of IORT in pancreatic cancer, these studies did not utilize ablative doses (biologically effective dose [BED10] > 100 Gy). Furthermore, the optimal radiation target volume in this setting is unclear. There has been increased interest in a "Triangle Volume" (TV), bordered by the celiac axis, superior mesenteric artery, common hepatic artery, portal vein, and superior mesenteric vein. Dissection of this area, has been advocated for by surgeons from Heidelberg as it contains extra-pancreatic perineural and lymphatic tracts, which may harbor microscopic disease at risk of mediating local failure. Interestingly, a recent analysis from our institution indicated that nearly all local failures occur in the TV. Therefore, the purpose of this protocol is to evaluate the safety of delivering an ablative radiation dose to the TV with IORT following neoadjuvant chemotherapy and stereotactic body radiation therapy (SBRT). METHODS Patients with non-metastatic pancreatic adenocarcinoma centered in the head or neck of the pancreas will be enrolled. Following treatment with multi-agent neoadjuvant chemotherapy, patients will undergo SBRT (40 Gy/5 fractions) followed by IORT (15 Gy/1 fraction) to the TV during the Whipple procedure. The primary objective is acute (< 90 days) toxicity after IORT measured by Clavien-Dindo classification. Secondary objectives include late (> 90 days) toxicity after IORT measured by Clavien-Dindo classification, overall survival, local progression-free survival, distant metastasis-free survival, and progression-free survival. DISCUSSION If the results show that delivering an ablative radiation dose to the TV with IORT after neoadjuvant chemotherapy and SBRT is safe and feasible, it warrants further investigation in a phase II trial to evaluate efficacy of this approach. Trial Registration This study was registered at ClinicalTrials.gov on 12/2/2021 (NCT05141513). https://clinicaltrials.gov/ct2/show/NCT05141513.
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Affiliation(s)
- Abhinav V Reddy
- Sidney Kimmel Cancer Center, Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University School of Medicine, 401 N Broadway, Baltimore, MD, 21231, USA.
| | - Colin S Hill
- Sidney Kimmel Cancer Center, Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University School of Medicine, 401 N Broadway, Baltimore, MD, 21231, USA
| | - Lei Zheng
- Sidney Kimmel Cancer Center, Department of Oncology, Johns Hopkins University School of Medicine, 401 N Broadway, Baltimore, MD, 21231, USA
| | - Jin He
- Sidney Kimmel Cancer Center, Department of Surgery, Johns Hopkins University School of Medicine, 401 N Broadway, Baltimore, MD, 21231, USA
| | - Amol K Narang
- Sidney Kimmel Cancer Center, Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University School of Medicine, 401 N Broadway, Baltimore, MD, 21231, USA
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Puleo A, Malla M, Boone BA. Defining the Optimal Duration of Neoadjuvant Therapy for Pancreatic Ductal Adenocarcinoma: Time for a Personalized Approach? Pancreas 2022; 51:1083-1091. [PMID: 37078929 PMCID: PMC10144367 DOI: 10.1097/mpa.0000000000002147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 11/03/2022] [Indexed: 04/21/2023]
Abstract
ABSTRACT Despite recent advances, pancreatic ductal adenocarcinoma (PDAC) continues to be associated with dismal outcomes, with a cure evading most patients. While historic treatment for PDAC has been surgical resection followed by 6 months of adjuvant therapy, there has been a recent shift toward neoadjuvant treatment (NAT). Several considerations support this approach, including the characteristic early systemic spread of PDAC, and the morbidity often surrounding pancreatic resection, which can delay recovery and preclude patients from starting adjuvant treatment. The addition of NAT has been suggested to improve margin-negative resection rates, decrease lymph node positivity, and potentially translate to improved survival. Conversely, complications and disease progression can occur during preoperative treatment, potentially eliminating the chance of curative resection. As NAT utilization has increased, treatment durations have been found to vary widely between institutions with an optimal duration remaining undefined. In this review, we assess the existing literature on NAT for PDAC, reviewing treatment durations reported across retrospective case series and prospective clinical trials to establish currently used approaches and seek the optimal duration. We also analyze markers of treatment response and review the potential for personalized approaches that may help clarify this important treatment question and move NAT toward a more standardized approach.
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Affiliation(s)
- Amanda Puleo
- From the Division of Surgical Oncology, Department of Surgery
| | - Midhun Malla
- Section of Hematology/Oncology, Department of Medicine
| | - Brian A. Boone
- From the Division of Surgical Oncology, Department of Surgery
- Department of Microbiology, Immunology and Cell Biology, West Virginia University, Morgantown, WV
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8
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Zambirinis CP, Midya A, Chakraborty J, Chou JF, Zheng J, McIntyre CA, Koszalka MA, Wang T, Do RK, Balachandran VP, Drebin JA, Kingham TP, D'Angelica MI, Allen PJ, Gönen M, Simpson AL, Jarnagin WR. Recurrence After Resection of Pancreatic Cancer: Can Radiomics Predict Patients at Greatest Risk of Liver Metastasis? Ann Surg Oncol 2022; 29:4962-4974. [PMID: 35366706 PMCID: PMC9253095 DOI: 10.1245/s10434-022-11579-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Accepted: 02/21/2022] [Indexed: 07/20/2023]
Abstract
BACKGROUND Liver metastasis (LM) after pancreatic ductal adenocarcinoma (PDAC) resection is common but difficult to predict and has grave prognosis. We combined preoperative clinicopathological variables and quantitative analysis of computed tomography (CT) imaging to predict early LM. METHODS We retrospectively evaluated patients with PDAC submitted to resection between 2005 and 2014 and identified clinicopathological variables associated with early LM. We performed liver radiomic analysis on preoperative contrast-enhanced CT scans and developed a logistic regression classifier to predict early LM (< 6 months). RESULTS In 688 resected PDAC patients, there were 516 recurrences (75%). The cumulative incidence of LM at 5 years was 41%, and patients who developed LM first (n = 194) had the lowest 1-year overall survival (OS) (34%), compared with 322 patients who developed extrahepatic recurrence first (61%). Independent predictors of time to LM included poor tumor differentiation (hazard ratio (HR) = 2.30; P < 0.001), large tumor size (HR = 1.17 per 2-cm increase; P = 0.048), lymphovascular invasion (HR = 1.50; P = 0.015), and liver Fibrosis-4 score (HR = 0.89 per 1-unit increase; P = 0.029) on multivariate analysis. A model using radiomic variables that reflect hepatic parenchymal heterogeneity identified patients at risk for early LM with an area under the receiver operating characteristic curve (AUC) of 0.71; the performance of the model was improved by incorporating preoperative clinicopathological variables (tumor size and differentiation status; AUC = 0.74, negative predictive value (NPV) = 0.86). CONCLUSIONS We confirm the adverse survival impact of early LM after resection of PDAC. We further show that a model using radiomic data from preoperative imaging combined with tumor-related variables has great potential for identifying patients at high risk for LM and may help guide treatment selection.
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Affiliation(s)
- Constantinos P Zambirinis
- Hepatopancreatobiliary Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY, USA
- Division of Surgical Oncology, Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, USA
| | - Abhishek Midya
- Hepatopancreatobiliary Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Jayasree Chakraborty
- Hepatopancreatobiliary Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Joanne F Chou
- Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Jian Zheng
- Hepatopancreatobiliary Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Caitlin A McIntyre
- Hepatopancreatobiliary Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Maura A Koszalka
- Hepatopancreatobiliary Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Tiegong Wang
- Hepatopancreatobiliary Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY, USA
- Cangzhou Central Hospital, Cangzhou City, Hebei Province, China
| | - Richard K Do
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Vinod P Balachandran
- Hepatopancreatobiliary Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Jeffrey A Drebin
- Hepatopancreatobiliary Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - T Peter Kingham
- Hepatopancreatobiliary Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Michael I D'Angelica
- Hepatopancreatobiliary Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Peter J Allen
- Hepatopancreatobiliary Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Mithat Gönen
- Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Amber L Simpson
- Department of Biomedical and Molecular Sciences and School of Computing, Queen's University, Kingston, ON, Canada
| | - William R Jarnagin
- Hepatopancreatobiliary Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
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9
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Mellado S, Vega EA, Abudalou M, Kutlu OC, Salehi O, Li M, Kozyreva O, Freeman R, Conrad C. Trends in Preoperative Chemotherapy Utilization for Proximal Pancreatic Cancer: Are We Making Progress? J Gastrointest Surg 2022; 26:1-7. [PMID: 35508681 DOI: 10.1007/s11605-022-05336-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Accepted: 04/16/2022] [Indexed: 01/31/2023]
Abstract
BACKGROUND While it has been shown that neoadjuvant chemotherapy (NCT) for pancreatic cancer (PDAC) undergoing pancreaticoduodenectomy (PD) is critical for optimal oncologic management, NCT is (A) not universally practiced and (B) the reasons ill-defined. This study investigates national rates, trends, and factors affecting NCT utilization. PATIENTS AND METHODS Using the National Cancer Database, patients who underwent PD for PDAC between 2006 and 2017 were identified. Changes in chemotherapy sequence over time were identified. For patients diagnosed after 2010, multivariable logistic regression models for factors affecting NCT were created. RESULTS A total of 128,980 patients were diagnosed and 23,206 underwent surgery. Three thousand five (12.9%) received NCT with a preoperative chemotherapy (NCT + PCT) utilization rate of 7.3% in 2004 that increased to 36.8% in 2017. Factors affecting utilization of preoperative chemotherapy were age (OR 0.972), academic and integrated network institutions (OR 1.916, OR 1.559), institutional case volume (OR 1.007), distance from the hospital (OR 1.002), stage (IB OR 3.108, IIA OR 3.133, IIB OR 3.775, III OR 3.782), grade IV (OR 1.977), and insurance status (private OR 2.371, Medicaid OR 1.811, and Medicare OR 2.191, government OR 2.645). CONCLUSION Even though more than 3/5 of patients receive no preoperative chemotherapy (NCT + PCT) and nearly 1/5 of patients still receive no chemotherapy at all, utilization of NCT is increasing. Moreover, since this study demonstrates that omission of NCT is associated with modifiable factors such as type of institution and health care disparity, mechanisms (reimbursement, policy) geared to change current national practice patterns may most immediately affect optimal oncologic management.
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Affiliation(s)
- Sebastián Mellado
- Department of Surgery, St. Elizabeth's Medical Center, Tufts University School of Medicine, Boston, MA, USA
| | - Eduardo A Vega
- Department of Surgery, St. Elizabeth's Medical Center, Tufts University School of Medicine, Boston, MA, USA
| | - Mohammad Abudalou
- Department of Medicine, St. Elizabeth's Medical Center and Department of Medical Oncology, Boston, MA, USA
| | - Onur C Kutlu
- Department of Surgery, Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Omid Salehi
- Department of Surgery, St. Elizabeth's Medical Center, Tufts University School of Medicine, Boston, MA, USA
| | - Mu Li
- Dana-Farber Cancer Institute, Harvard School of Medicine, Boston, MA, USA
| | - Olga Kozyreva
- Dana-Farber Cancer Institute, Harvard School of Medicine, Boston, MA, USA
| | - Richard Freeman
- Department of Surgery, St. Elizabeth's Medical Center, Tufts University School of Medicine, Boston, MA, USA
| | - Claudius Conrad
- Department of Surgery, St. Elizabeth's Medical Center, Tufts University School of Medicine, Boston, MA, USA.
- Hepato-Pancreato-Biliary Surgery, St. Elizabeth's Medical Center, Tufts University School of Medicine, 11 Nevins St., Suite 201, Brighton, MA, 02135, USA.
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10
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Kurahara H, Mataki Y, Idichi T, Iino S, Kawasaki Y, Arigami T, Mori S, Sasaki K, Shinchi H, Ohtsuka T. Effectiveness of Adjuvant Therapy in Patients with Pancreatic Cancer Who Underwent Neoadjuvant Therapy. Ann Surg Oncol 2021; 28:6238-6245. [PMID: 33606140 DOI: 10.1245/s10434-021-09712-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 01/26/2021] [Indexed: 11/18/2022]
Abstract
PURPOSE Neoadjuvant therapy (NAT) is used to treat not only advanced pancreatic cancer but also resectable lesions. The present study investigated the effectiveness of postoperative adjuvant chemotherapy for patients with pancreatic cancer who underwent surgical resection after NAT. METHODS Patients who underwent macroscopically curative resection after NAT for pancreatic cancer were enrolled. Adjuvant chemotherapy was defined as at least 1 cycle of planned chemotherapy within 3 months after the date of surgery and included S-1, gemcitabine, or both. We retrospectively examined the effect of adjuvant chemotherapy on overall survival (OS) and recurrence-free survival (RFS) as a function of patients' clinicopathological factors. RESULTS Ninety-seven patients were included in the study, of which 68 (70.1%) underwent adjuvant chemotherapy. Administration of adjuvant chemotherapy was significantly associated with prolonged OS and RFS in patients whose elevated levels of carbohydrate antigen 19-9 or duke pancreatic monoclonal antigen type-2 did not normalize after NAT. In patients with pathological lymph node metastasis, the administration of adjuvant chemotherapy was significantly associated with longer OS but did not improve PFS. CONCLUSIONS Postoperative adjuvant chemotherapy was associated with prolonged postoperative survival in patients with pancreatic cancer who did not sufficiently respond to NAT as judged by tumor marker expression.
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Affiliation(s)
- Hiroshi Kurahara
- Department of Digestive Surgery, Breast and Thyroid Surgery, Graduate School of Medical Sciences, Kagoshima University, Kagoshima, Japan.
| | - Yuko Mataki
- Department of Digestive Surgery, Breast and Thyroid Surgery, Graduate School of Medical Sciences, Kagoshima University, Kagoshima, Japan
| | - Tetsuya Idichi
- Department of Digestive Surgery, Breast and Thyroid Surgery, Graduate School of Medical Sciences, Kagoshima University, Kagoshima, Japan
| | - Satoshi Iino
- Department of Digestive Surgery, Breast and Thyroid Surgery, Graduate School of Medical Sciences, Kagoshima University, Kagoshima, Japan
| | - Yota Kawasaki
- Department of Digestive Surgery, Breast and Thyroid Surgery, Graduate School of Medical Sciences, Kagoshima University, Kagoshima, Japan
| | - Takaaki Arigami
- Department of Digestive Surgery, Breast and Thyroid Surgery, Graduate School of Medical Sciences, Kagoshima University, Kagoshima, Japan
| | - Shinichiro Mori
- Department of Digestive Surgery, Breast and Thyroid Surgery, Graduate School of Medical Sciences, Kagoshima University, Kagoshima, Japan
| | - Ken Sasaki
- Department of Digestive Surgery, Breast and Thyroid Surgery, Graduate School of Medical Sciences, Kagoshima University, Kagoshima, Japan
| | | | - Takao Ohtsuka
- Department of Digestive Surgery, Breast and Thyroid Surgery, Graduate School of Medical Sciences, Kagoshima University, Kagoshima, Japan
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11
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Evangelista L, Zucchetta P, Moletta L, Serafini S, Cassarino G, Pegoraro N, Bergamo F, Sperti C, Cecchin D. The role of FDG PET/CT or PET/MRI in assessing response to neoadjuvant therapy for patients with borderline or resectable pancreatic cancer: a systematic literature review. Ann Nucl Med 2021; 35:767-776. [PMID: 34047926 PMCID: PMC8197718 DOI: 10.1007/s12149-021-01629-0] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 05/11/2021] [Indexed: 02/05/2023]
Abstract
The aim of the present systematic review is to examine the role of fluorodeoxyglucose (FDG) positron emission tomography (PET) associated with computed tomography (CT) or magnetic resonance imaging (MRI) in assessing response to preoperative chemotherapy or chemoradiotherapy (CRT) for patients with borderline and resectable pancreatic ductal adenocarcinoma (PDAC). Three researchers ran a database query in PubMed, Web of Science and EMBASE. The total number of patients considered was 488. The most often used parameters of response to therapy were the reductions in the maximum standardized uptake value (SUVmax) or the peak standardized uptake lean mass (SULpeak). Patients whose SUVs were higher at the baseline (before CRT) were associated with a better response to therapy and a better overall survival. SUVs remaining high after neoadjuvant therapy correlated with a poor prognosis. Available data indicate that FDG PET/CT or PET/MRI can be useful for predicting and assessing response to CRT in patients with resectable or borderline PDAC.
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Affiliation(s)
- Laura Evangelista
- Nuclear Medicine Unit, Department of Medicine DIMED, University of Padua, Via Giustiniani 2, 35128, Padua, Italy.
| | - Pietro Zucchetta
- Nuclear Medicine Unit, Department of Medicine DIMED, University of Padua, Via Giustiniani 2, 35128, Padua, Italy
| | - Lucia Moletta
- Department of Surgery, Oncology and Gastroenterology-DiSCOG, University of Padua, Via Giustiniani 2, 35128, Padua, Italy
| | - Simone Serafini
- Department of Surgery, Oncology and Gastroenterology-DiSCOG, University of Padua, Via Giustiniani 2, 35128, Padua, Italy
| | - Gianluca Cassarino
- Nuclear Medicine Unit, Department of Medicine DIMED, University of Padua, Via Giustiniani 2, 35128, Padua, Italy
| | - Nicola Pegoraro
- Nuclear Medicine Unit, Department of Medicine DIMED, University of Padua, Via Giustiniani 2, 35128, Padua, Italy
| | - Francesca Bergamo
- Medical Oncology Unit 1, Veneto Institute of Oncology IOV-IRCCS, Via Gattamelata 64, 35128, Padua, Italy
| | - Cosimo Sperti
- Department of Surgery, Oncology and Gastroenterology-DiSCOG, University of Padua, Via Giustiniani 2, 35128, Padua, Italy
| | - Diego Cecchin
- Nuclear Medicine Unit, Department of Medicine DIMED, University of Padua, Via Giustiniani 2, 35128, Padua, Italy
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12
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Prediction of early recurrence of pancreatic ductal adenocarcinoma after resection. PLoS One 2021; 16:e0249885. [PMID: 33844700 PMCID: PMC8041173 DOI: 10.1371/journal.pone.0249885] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 03/28/2021] [Indexed: 12/11/2022] Open
Abstract
Background Even after curative resection, pancreatic ductal adenocarcinoma (PDAC) patients suffer a high rate of recurrence. There is an unmet need to predict which patients will experience early recurrence after resection in order to adjust treatment strategies. Methods Data of patients with resectable PDAC undergoing surgical resection between January 2005 and September 2018 were reviewed to stratify for early recurrence defined as occurring within 6 months of resection. Preoperative data including demographics, tumor markers, blood immune-inflammatory factors and clinicopathological data were examined. We employed Elastic Net, a sparse modeling method, to construct models predicting early recurrence using these multiple preoperative factors. As a result, seven preoperative factors were selected: age, duke pancreatic monoclonal antigen type 2 value, neutrophil:lymphocyte ratio, systemic immune-inflammation index, tumor size, lymph node metastasis and is peripancreatic invasion. Repeated 10-fold cross-validations were performed, and area under the receiver operating characteristic curve (AUC) and decision curve analysis were used to evaluate the usefulness of the models. Results A total of 136 patients was included in the final analysis, of which 35 (34%) experienced early recurrence. Using Elastic Net, we found that 7 of 14 preoperative factors were useful for the predictive model. The mean AUC of all models constructed in the repeated validation was superior to the standard marker CA 19–9 (0.718 vs 0.657), whereas the AUC of the model constructed from the entire patient cohort was 0.767. Decision curve analysis showed that the models had a higher mean net benefit across the majority of the range of reasonable threshold probabilities. Conclusion A model using multiple preoperative factors can improve prediction of early resectable PDAC recurrence.
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13
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Yu Y, Zheng P, Chen Y, Wang B, Paul ME, Tao P, Wang D, Li H, Gu B, Gao L, Wang D, Chen H. Advances and challenges of neoadjuvant therapy in pancreatic cancer. Asia Pac J Clin Oncol 2020; 17:425-434. [PMID: 33164329 DOI: 10.1111/ajco.13504] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 07/10/2020] [Indexed: 01/06/2023]
Abstract
Pancreatic cancer has been becoming the second cause of cancer death in the western world, and its disease burden has increased. Neoadjuvant therapy is one of the current research hotspots in the field of pancreatic cancer, aiming to improve the surgical rate and prognosis of pancreatic cancer. Based on the latest evidence, this review discussed neoadjuvant therapy in pancreatic cancer from the following three aspects: patient selection, protocols selection of neoadjuvant therapy, and treatment response evaluation and resectability prediction. A big controversy existed on the indications of neoadjuvant treatment, but it was agreed that any patient who is likely to achieve R0 resection due to neoadjuvant therapy should be the targeted population. A variety of chemotherapy regimens were tried for neoadjuvant therapy in pancreatic cancer, and FOLFIRINOX and Nab-Paclitaxel plus Gemcitabine are two preferred regimens at present. It was challenging to evaluate treatment response and predict resectability after neoadjuvant therapy, although imaging by CT is widely used. Based on new findings of the remarkable performance of several chemotherapy regimens with or without radiotherapy, the neoadjuvant indications of pancreatic cancer have extended in recent years. However, it is still a challenge to assess the neoadjuvant treatment response and determine the timing of surgery.
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Affiliation(s)
- Yang Yu
- The Department of Tumor Surgery, Lanzhou University Second Hospital, Lanzhou, P. R. China.,The Second Clinical Medical College of Lanzhou University, Lanzhou, P. R. China
| | - Peng Zheng
- The Department of Tumor Surgery, Lanzhou University Second Hospital, Lanzhou, P. R. China.,The Second Clinical Medical College of Lanzhou University, Lanzhou, P. R. China
| | - Yajing Chen
- The Department of Tumor Surgery, Lanzhou University Second Hospital, Lanzhou, P. R. China.,The Second Clinical Medical College of Lanzhou University, Lanzhou, P. R. China
| | - Bofang Wang
- The Department of Tumor Surgery, Lanzhou University Second Hospital, Lanzhou, P. R. China.,The Second Clinical Medical College of Lanzhou University, Lanzhou, P. R. China
| | - Maswikiti Ewetse Paul
- The Department of Tumor Surgery, Lanzhou University Second Hospital, Lanzhou, P. R. China.,The Second Clinical Medical College of Lanzhou University, Lanzhou, P. R. China
| | - Pengxian Tao
- The Department of Tumor Surgery, Lanzhou University Second Hospital, Lanzhou, P. R. China.,The Second Clinical Medical College of Lanzhou University, Lanzhou, P. R. China
| | - Dengfeng Wang
- The Department of Tumor Surgery, Lanzhou University Second Hospital, Lanzhou, P. R. China.,The Second Clinical Medical College of Lanzhou University, Lanzhou, P. R. China
| | - Haiyuan Li
- The Department of Tumor Surgery, Lanzhou University Second Hospital, Lanzhou, P. R. China.,The Second Clinical Medical College of Lanzhou University, Lanzhou, P. R. China
| | - Baohong Gu
- The Department of Tumor Surgery, Lanzhou University Second Hospital, Lanzhou, P. R. China.,The Second Clinical Medical College of Lanzhou University, Lanzhou, P. R. China
| | - Lei Gao
- The Department of Tumor Surgery, Lanzhou University Second Hospital, Lanzhou, P. R. China.,The Second Clinical Medical College of Lanzhou University, Lanzhou, P. R. China
| | - Dan Wang
- The Department of Tumor Surgery, Lanzhou University Second Hospital, Lanzhou, P. R. China.,The Second Clinical Medical College of Lanzhou University, Lanzhou, P. R. China
| | - Hao Chen
- The Department of Tumor Surgery, Lanzhou University Second Hospital, Lanzhou, P. R. China.,The Key Laboratory of the Digestive System Tumors of Gansu Province, Lanzhou University Second Hospital, Lanzhou, P. R. China
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