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Yang XR, Li YL, Li ZY, Chai XM. Primary hepatic neuroendocrine neoplasms: imaging characteristics and misdiagnosis analysis. Front Oncol 2024; 14:1391663. [PMID: 38807765 PMCID: PMC11130405 DOI: 10.3389/fonc.2024.1391663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Accepted: 04/29/2024] [Indexed: 05/30/2024] Open
Abstract
Objective To analyze the CT and MR features of Primary hepatic neuroendocrine neoplasms (PHNENs) in order to enhance the diagnostic accuracy of this disease. Methods A retrospective analysis was conducted on patients diagnosed with hepatic neuroendocrine neoplasms, excluding other sites of origin through general examination and postoperative follow-up. The CT and MR signs were analyzed according to the 2018 version of Liver Imaging Reporting and Data System (LI-RADS), along with causes of misdiagnosis. Results Twelve patients, including 6 males and 6 females, were enrolled in this study. There was no significant increase in liver tumor markers among all cases. Most masses were multiple (9/12), exhibiting low attenuation on pre-contrast CT scans, T1-hypointense signal, T2-hyperintense signal, and restricted diffusion. The majority of these masses (7/10) demonstrated similar rim arterial phase hyper-enhancement as well as peripheral "washout" during venous portal phase and delayed phase imaging. Three cases had incomplete capsules while one case had a complete capsule. Cyst/necrosis was observed in 7 out of all cases following administration of contrast agent, with 5 mainly distributed in the periphery. All masses lacked fat, calcification, vascular or bile duct tumor thrombus formation. Conclusion The imaging findings associated with PHNENs possess certain specificity, often presenting as multiple masses within the liver accompanied by peripheral cyst/necrosis, similar rim arterial phase hyper-enhancement during venous portal phase and delayed phase imaging.
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Affiliation(s)
- Xiu-Rong Yang
- Department of Radiology, Xing Lin Branch of the First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Ying-Li Li
- Department of Radiology, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Zi-Yan Li
- Department of Radiology, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Xiao-Ming Chai
- Department of Radiology, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
- The Third Clinical College of Fujian Medical University, Fuzhou, China
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Shen X, Yang F, Jiang T, Zheng Z, Chen Y, Tan C, Ke N, Qiu J, Liu X, Zhang H, Wang X. A nomogram to preoperatively predict the aggressiveness of non-functional pancreatic neuroendocrine tumors based on CT features. Eur J Radiol 2024; 171:111284. [PMID: 38232572 DOI: 10.1016/j.ejrad.2023.111284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 12/11/2023] [Accepted: 12/30/2023] [Indexed: 01/19/2024]
Abstract
OBJECTIVES To develop a nomogram to predict the aggressiveness of non-functional pancreatic neuroendocrine tumors (NF-pNETs) based on preoperative computed tomography (CT) features. METHODS This study included 176 patients undergoing radical resection for NF-pNETs. These patients were randomly divided into the training (n = 123) and validation sets (n = 53). A nomogram was developed based on preoperative predictors of aggressiveness of the NF-pNETs which were identified by univariable and multivariable logistic regression analysis. The aggressiveness of NF-pNETs was defined as a composite measure including G3 grading, N+, distant metastases, and/ or disease recurrence. RESULTS Altogether, the number of patients with highly aggressive NF-pNETs was 37 (30.08 %) and 15 (28.30 %) in the training and validation sets, respectively. Multivariable logistic regression analysis identified that tumor size, biliopancreatic duct dilatation, lymphadenopathy, and enhancement pattern were preoperative predictors of aggressiveness. Those variables were used to develop a nomogram with good concordance statistics of 0.89 and 0.86 for predicting aggressiveness in the training and validation sets, respectively. With a nomogram score of 59, patients with NF-pNETs were divided into low-aggressive and high-aggressive groups. The high-aggressive group had decreased overall survival (OS) and disease-free survival (DFS). Moreover, the nomogram showed good performance in predicting OS and DFS at 3, 5, and 10 years. CONCLUSION The nomogram integrating CT features helped preoperatively predict the aggressiveness of NF-pNETs and could potentially facilitate clinical decision-making.
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Affiliation(s)
- Xiaoding Shen
- Division of Pancreatic Surgery, Department of General Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan Province, China
| | - Fan Yang
- Department of Radiology, West China Hospital, Sichuan University, Chengdu, Sichuan Province, China
| | - Taiyan Jiang
- Division of Pancreatic Surgery, Department of General Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan Province, China
| | - Zhenjiang Zheng
- Division of Pancreatic Surgery, Department of General Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan Province, China
| | - Yonghua Chen
- Division of Pancreatic Surgery, Department of General Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan Province, China
| | - Chunlu Tan
- Division of Pancreatic Surgery, Department of General Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan Province, China
| | - Nengwen Ke
- Division of Pancreatic Surgery, Department of General Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan Province, China
| | - Jiajun Qiu
- Department of West China Biomedical Big Data Center, West China Hospital, Sichuan University, Chengdu, China
| | - Xubao Liu
- Division of Pancreatic Surgery, Department of General Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan Province, China
| | - Hao Zhang
- Division of Pancreatic Surgery, Department of General Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan Province, China.
| | - Xing Wang
- Division of Pancreatic Surgery, Department of General Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan Province, China.
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Kim DH, Kim B, Chung DJ, Kim KA, Lee SL, Choi MH, Kim H, Rha SE. Predicting resection margin status of pancreatic neuroendocrine tumors on CT: performance of NCCN resectability criteria. Br J Radiol 2023; 96:20230503. [PMID: 37750830 PMCID: PMC10646654 DOI: 10.1259/bjr.20230503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 07/18/2023] [Accepted: 08/21/2023] [Indexed: 09/27/2023] Open
Abstract
OBJECTIVE To test the performance of the National Comprehensive Cancer Network (NCCN) CT resectability criteria for predicting the surgical margin status of pancreatic neuroendocrine tumor (PNET) and to identify factors associated with margin-positive resection. METHODS Eighty patients with pre-operative CT and upfront surgery were retrospectively enrolled. Two radiologists assessed the CT resectability (resectable [R], borderline resectable [BR], unresectable [UR]) of the PNET according to NCCN criteria. Logistic regression was used to identify factors associated with resection margin status. κ statistics were used to evaluate interreader agreements. Kaplan-Meier method with log-rank test was used to estimate and compare recurrence-free survival (RFS). RESULTS Forty-five patients (56.2%) received R0 resection and 35 (43.8%) received R1 or R2 resection. R0 resection rates were 63.6-64.2%, 20.0-33.3%, and 0% for R, BR, and UR diseases, respectively (all p ≤ 0.002), with a good interreader agreement (κ, 0.74). Tumor size (<2 cm, 2-4 cm, and >4 cm; odds ratio (OR), 9.042-18.110; all p ≤ 0.007) and NCCN BR/UR diseases (OR, 5.918; p = 0.032) were predictors for R1 or R2 resection. The R0 resection rate was 91.7% for R disease <2 cm and decreased for larger R disease. R0 resection and smaller tumor size in R disease improved RFS. CONCLUSION NCCN resectability criteria can stratify patients with PNET into distinct groups of R0 resectability. Adding tumor size to R disease substantially improves the prediction of R0 resection, especially for PNETs <2 cm. ADVANCES IN KNOWLEDGE Tumor size and radiologic resectability independently predicted margin status of PNETs.
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Affiliation(s)
- Dong Hwan Kim
- Department of Radiology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Bohyun Kim
- Department of Radiology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Dong Jin Chung
- Department of Radiology, Yeouido St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Kyung Ah Kim
- Department of Radiology, St. Vincent’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Su Lim Lee
- Department of Radiology, Uijeongbu St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Moon Hyung Choi
- Department of Radiology, Eunpyeong St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Hokun Kim
- Department of Radiology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Sung Eun Rha
- Department of Radiology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
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Salvia R, Burelli A, Nepi A, Caravati A, Tomelleri C, Dall'Olio T, Casciani F, Crinò SF, Perri G, Marchegiani G. Pancreatic cystic neoplasms: Still high rates of preoperative misdiagnosis in the guidelines and endoscopic ultrasound era. Surgery 2023; 174:1410-1415. [PMID: 37758634 DOI: 10.1016/j.surg.2023.07.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 06/01/2023] [Accepted: 07/13/2023] [Indexed: 09/29/2023]
Abstract
BACKGROUND A wrong diagnosis of nature is common in pancreatic cystic neoplasms. The aim of the current study is to reappraise the diagnostic errors for presumed pancreatic cystic neoplasms in patients undergoing surgery. METHODS All pancreatic resections for presumed pancreatic cystic neoplasms following international guidelines between 2011 and 2020 were analyzed. Misdiagnosis was defined as the discrepancy between preoperative diagnosis of nature and final pathology. Mismatch was defined as the discrepancy between the preoperative suspect of malignancy (or its absence) and final pathology. RESULTS A total of 601 patients were included. Endoscopic ultrasound was performed in 301 (50%) patients. Overall misdiagnosis and mismatch were 19% and 34%, respectively, with no significant benefit for those patients who underwent endoscopic ultrasound. The highest rate of misdiagnosis was reached for cystic neuroendocrine tumors (61%) and the lowest for solid pseudopapillary tumors (6%). Several diagnostic errors had clinical relevance, including 7 (13%) presumed serous cystic neoplasms eventually found to be other malignant entities, 50 (24%) intraductal papillary mucinous neoplasms with high-risk stigmata revealed to be non-malignant, and 38 (33%) intraductal papillary mucinous neoplasms without high-risk stigmata revealed to be malignant at final pathology. A preoperative presumption of malignant mucinous cystic neoplasm was correct in only 20 (16%) patients. CONCLUSIONS Despite not always being clinically relevant, diagnostic errors are still common among resected pancreatic cystic neoplasms when applying international guidelines. New diagnostic tools beyond endoscopic ultrasound are needed to refine the diagnosis of those lesions at higher risk for unnecessary surgery or accidentally observed, nevertheless being malignant.
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Affiliation(s)
- Roberto Salvia
- Department of General and Pancreatic Surgery, The Pancreas Institute, Verona University Hospital, Italy.
| | - Anna Burelli
- Department of General and Pancreatic Surgery, The Pancreas Institute, Verona University Hospital, Italy
| | - Angelica Nepi
- Department of General and Pancreatic Surgery, The Pancreas Institute, Verona University Hospital, Italy
| | - Andrea Caravati
- Department of General and Pancreatic Surgery, The Pancreas Institute, Verona University Hospital, Italy
| | - Claudia Tomelleri
- Department of General and Pancreatic Surgery, The Pancreas Institute, Verona University Hospital, Italy
| | - Tommaso Dall'Olio
- Department of General and Pancreatic Surgery, The Pancreas Institute, Verona University Hospital, Italy
| | - Fabio Casciani
- Department of General and Pancreatic Surgery, The Pancreas Institute, Verona University Hospital, Italy
| | | | - Giampaolo Perri
- Department of General and Pancreatic Surgery, The Pancreas Institute, Verona University Hospital, Italy
| | - Giovanni Marchegiani
- Department of General and Pancreatic Surgery, The Pancreas Institute, Verona University Hospital, Italy; Hepatopancreatobiliary and Liver Transplant Surgery, Department of Surgical, Oncological and Gastroenterological Sciences (DiSCOG), University of Padua, Italy
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5
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Bell PD, Singhi AD. Integrating Molecular Analysis into the Pathologic Evaluation of Pancreatic Cysts. Surg Pathol Clin 2022; 15:455-468. [PMID: 36049828 DOI: 10.1016/j.path.2022.05.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Abstract
The development of cross-sectional imaging techniques has enhanced the detection of pancreatic cystic lesions (PCLs). PCLs are found in approximately 2% of the general population, often as incidentally detected lesions on computed tomography or MRI during the evaluation of other medical conditions. Broadly, PCLs are classified as mucinous or nonmucinous. Mucinous PCLs include mucinous cystic neoplasms and intraductal papillary mucinous neoplasms. Nonmucinous PCLs include pseudocysts, serous cystadenomas, solid pseudopapillary neoplasms, and cystic pancreatic neuroendocrine tumors, as well as cystic acinar cell carcinoma, cystic degeneration of pancreatic ductal adenocarcinoma, lymphoepithelial cyst, and others.
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Affiliation(s)
- Phoenix D Bell
- Department of Pathology, University of Pittsburgh Medical Center, 200 Lothrop St. Pittbsurgh, PA 15213, USA.
| | - Aatur D Singhi
- Department of Pathology, University of Pittsburgh Medical Center, 200 Lothrop St. Pittbsurgh, PA 15213, USA
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6
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Impact of tumor size and location on endoscopic ultrasound-guided sampling of pancreatic neuroendocrine tumors: A recursive partitioning analysis. Pancreatology 2022; 22:644-650. [PMID: 35589512 DOI: 10.1016/j.pan.2022.04.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Revised: 04/20/2022] [Accepted: 04/26/2022] [Indexed: 12/11/2022]
Abstract
BACKGROUND Current guidelines provide weak recommendations to treat small (<2 cm) non-functional pancreatic neuroendocrine tumors with low Ki-67 proliferation index either by resection or clinical follow-up. However, there is a lack of consensus regarding the minimal size of pNET, which allows EUS-guided biopsy with high enough diagnostic accuracy for stratification. METHODS We conducted a retrospective, bicentric analysis of patients who had undergone EUS-guided pNET sampling in two tertiary care Endoscopy Units in Germany and Poland. Using a recursive partitioning of the tree-aided model, we aimed to stratify the probability of successful EUS-guided biopsy of pNET lesions according to their size and location. RESULTS In our pNET cohort, successful histological confirmation of a pNET diagnosis was achieved in 59/69 (85.5%) cases at the initial EUS-guided biopsy. In 41 patients with a pNET size less than 18.5 mm, the EUS-guided first biopsy was successful in 90.2%. In 16 of these patients with smaller lesions, EUS-guided sampling was 100% in very small (less than 11 mm) and extremely small lesions (less than 8 mm). The biopsy success rate was 100% in tail lesions in the size range between ≥5.95 and <8.1 mm but only 33.3% independent of the investigator in pancreatic head or body, with an error rate of 11.2% CONCLUSION: Using a recursive partitioning of the tree-aided stratification model, we demonstrate for the first time that in balancing risks and benefits, very small pNETs (<1 cm) in the tail of the pancreas should be sampled under EUS-guidance.
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7
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Perinel J, Nappo G, Zerbi A, Heidsma CM, Nieveen van Dijkum EJM, Han HS, Yoon YS, Satoi S, Demir IE, Friess H, Vashist Y, Izbicki J, Muller AC, Gloor B, Sandini M, Gianotti L, Subtil F, Adham M. Sporadic nonfunctional pancreatic neuroendocrine tumors: Risk of lymph node metastases and aggressiveness according to tumor size: A multicenter international study. Surgery 2022; 172:975-981. [PMID: 35623953 DOI: 10.1016/j.surg.2022.04.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 03/25/2022] [Accepted: 04/06/2022] [Indexed: 01/08/2023]
Abstract
BACKGROUND Although the correlation between tumor size and aggressiveness is clearly established in sporadic nonfunctional pancreatic neuroendocrine tumors, the management of tumors ≤2 cm remains debated. In recent guidelines, the cut-off size to operate ranged from 1 to 2 cm. The aim of this retrospective study was to report the rate of lymph nodes metastases in resected sporadic nonfunctional pancreatic neuroendocrine tumors, according to tumor size and, second, to identify risk factors of lymph node metastases and disease-free survival. METHODS Resected sporadic nonfunctional pancreatic neuroendocrine tumors from 9 international expert centers were included (1999-2017). Functional pancreatic neuroendocrine tumors, genetic syndromes, and R2 resection were excluded. Aggressiveness was defined as microvascular invasion, perineural invasion, lymph node metastases, G3 grading, distant metastases, and/or recurrence. RESULTS Overall, 495 resected sporadic nonfunctional pancreatic neuroendocrine tumors were included. For tumors up to 5 cm, the risk of lymph node metastases was increased by 1.73 for every 1 cm increase in size (odds ratio = 1.73; 95% confidence interval = 1.46-2.03). Tumor size >2 cm (P < .001), perineural invasion (P = .002), microvascular invasion (P < .001), and distant metastases (P = .008) were independently associated with lymph node metastases. Tumor size >2 cm (P = .003), R1 status (P = .004), lymph node metastases (P < .001), and World Health Organization grade 3 (P = .002) were independently associated with disease-free survival. Aggressiveness rate was 13.1% in tumors ≤1 cm and 29% in tumors between 1.1 and 2 cm. CONCLUSION In resected sporadic nonfunctional pancreatic neuroendocrine tumors, the risk of lymph node metastases is correlated to tumor size. Considering that sporadic nonfunctional pancreatic neuroendocrine tumors between 1.1 and 2 cm had a higher risk of lymph node metastases and recurrence compared to tumors ≤1 cm, the decision to perform surgery in this subgroup of patients should be individualized in surgically fit patients.
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Affiliation(s)
- Julie Perinel
- Department of Digestive Surgery, E. Herriot Hospital, Hospices Civils de Lyon, Lyon Sud Faculty of Medicine, UCBL1, Lyon, France.
| | - Gennaro Nappo
- Pancreatic Surgery Unit, Humanitas Clinical and Research Center-IRCCS Rozzano, Milan, Italy
| | - Alessandro Zerbi
- Pancreatic Surgery Unit, Humanitas Clinical and Research Center-IRCCS Rozzano, Milan, Italy; Department of Biomedical Sciences, Humanitas University, Milan, Italy
| | - Charlotte M Heidsma
- Department of Surgery, Amsterdam University Medical Center, University of Amsterdam, The Netherlands
| | | | - Ho Seong Han
- Department of Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Republic of Korea
| | - Yoo-Seok Yoon
- Department of Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Republic of Korea
| | - Sohei Satoi
- Department of Surgery, Kansai Medical University, Osaka, Japan; Division of Surgical Oncology, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Ihsan Ekin Demir
- Department of Surgery, Technical University Munich Faculty of Medicine, Munchen, Germany
| | - Helmut Friess
- Department of Surgery, Technical University Munich Faculty of Medicine, Munchen, Germany
| | - Yogesh Vashist
- Medias Klinikum, Centre for Surgical Oncology, Burghausen, Germany
| | - Jakob Izbicki
- General, Visceral, and Thoracic Surgery Department, Clinic University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | | | - Beat Gloor
- University Hospital Bern Inselspital Bern, Switzerland
| | - Marta Sandini
- School of Medicine and Surgery, University of Milano-Bicocca and Department of Surgery, San Gerardo Hospital, Monza, Italy
| | - Luca Gianotti
- School of Medicine and Surgery, University of Milano-Bicocca and Department of Surgery, San Gerardo Hospital, Monza, Italy
| | - Fabien Subtil
- UCBLUMR CNRS 5558 - LBBE, Service de Biostatistiques, Hospices Civils de Lyon, France
| | - Mustapha Adham
- Department of Digestive Surgery, E. Herriot Hospital, Hospices Civils de Lyon, Lyon Sud Faculty of Medicine, UCBL1, Lyon, France
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8
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Heidsma CM, Tsilimigras DI, Rocha F, Abbott DE, Fields R, Smith PM, Poultsides GA, Cho C, van Eijck C, van Dijkum EN, Maithel SK, Pawlik TM. Clinical relevance of performing endoscopic ultrasound-guided fine-needle biopsy for pancreatic neuroendocrine tumors less than 2 cm. J Surg Oncol 2020; 122:1393-1400. [PMID: 32783272 DOI: 10.1002/jso.26158] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 07/28/2020] [Indexed: 12/17/2022]
Abstract
BACKGROUND We sought to define the diagnostic yield and concordance rates between endoscopic ultrasound (EUS)-fine-needle aspiration (FNA) and surgical pathology specimen following resection of pancreatic neuroendocrine tumors (pNET) less than 2 cm. METHODS Patients with a pNET less than 2 cm who underwent EUS-FNA were identified using a multi-institutional international database. Tumor differentiation, and Ki-67 index, as determined through EUS-FNA were examined and concordance rates between EUS-FNA and the surgical pathology were assessed. RESULTS Among 628 patients with a pNET less than 2 cm, 57.2% of patients had an EUS-FNA performed. Patients who underwent EUS had slightly smaller size tumors (1.3 vs 1.4 cm), and the pNETs were less likely to be functional (15.3% vs 26.8%) or symptomatic (48.5% vs 56.5%) (both P < .05). Among 314 patients with a pNET less than 2 cm who had an EUS-FNA performed at the time of diagnosis, 243 (73.2%) had the diagnosis confirmed by preoperative EUS-FNA. Tumor differentiation and Ki-67 could be determined by EUS-FNA in only 26.4% and 20.1% of patients, respectively. Concordance rate between EUS-FNA and pathology was high relative to tumor differentiation (92.7%) and Ki-67 (81.0%). CONCLUSION Tumor differentiation and Ki-67 index could be determined by EUS-FNA in only 26.4% and 20.1% of cases, respectively. Further studies should focus on EUS techniques to optimize diagnostic yield and cell extraction in the preoperative setting.
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Affiliation(s)
- Charlotte M Heidsma
- Department of Surgery, The Ohio State University Wexner Medical Center, Columbus, Ohio.,Department of Surgery, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
| | | | - Flavio Rocha
- Department of Surgery, Virginia Mason Medical Center, Seattle, Washington
| | - Daniel E Abbott
- Department of Surgery, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Ryan Fields
- Department of Surgery, Washington University School of Medicine, St Louis, Wisconsin
| | - Paula M Smith
- Division of Surgical Oncology, Department of Surgery, Vanderbilt University, Nashville, Tennessee
| | | | - Cliff Cho
- Division of Hepatopancreatobiliary and Advanced Gastrointestinal Surgery, Department of Surgery, University of Michigan, Ann Arbor, Michigan
| | - Casper van Eijck
- Department of Surgery, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Elisabeth Nieveen van Dijkum
- Department of Surgery, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
| | - Shishir K Maithel
- Division of Surgical Oncology, Department of Surgery, Winship Cancer Institute, Emory University, Atlanta, Georgia
| | - Timothy M Pawlik
- Department of Surgery, The Ohio State University Wexner Medical Center, Columbus, Ohio
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9
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Tanaka M, Heckler M, Mihaljevic AL, Probst P, Klaiber U, Heger U, Schimmack S, Büchler MW, Hackert T. Systematic Review and Metaanalysis of Lymph Node Metastases of Resected Pancreatic Neuroendocrine Tumors. Ann Surg Oncol 2020; 28:1614-1624. [PMID: 32720049 DOI: 10.1245/s10434-020-08850-7] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 06/27/2020] [Indexed: 12/15/2022]
Abstract
BACKGROUND The optimal surgical strategy for pancreatic neuroendocrine tumors (PNETs) is unknown. However, current guidelines recommend a watch-and-wait strategy for small nonfunctional PNETs (NF-PNETs). The aim of this study is to investigate the risk stratification and prognostic significance of lymph node metastasis (LNM) of PNETs to guide decision-making for lymphadenectomy. PATIENTS AND METHODS The MEDLINE and Web of Science databases were systematically searched for studies reporting either risk factors of LNM in resected PNETs or survival of patients with LNM. The weighted average incidence of LNM was calculated according to tumor characteristics. Random-effects metaanalyses were performed, and pooled hazard ratios (HR) and their 95% confidence intervals (CI) were calculated to determine the impact of LNM on overall survival (OS). In subgroup analyses, NF-PNETs were assessed. RESULTS From a total of 5883 articles, 98 retrospective studies with 13,374 patients undergoing resection for PNET were included. In all PNETs, the weighted median rates of LNM were 11.5% for small (≤ 2 cm) PNETs and 15.8% for G1 PNETs. In NF-PNETs, the rates were 11.2% for small PNETs and 10.3% for G1 PNETs. LNM of all PNETs (HR 3.87, 95% CI 3.00-4.99, P < 0.001) and NF-PNETs (HR 4.98, 95% CI 2.81-8.83, P < 0.001) was associated with worse OS. CONCLUSIONS LNM is potentially prevalent even in small and well-differentiated PNETs and is associated with worse prognosis. A watch-and-wait strategy for small NF-PNETs should be reappraised, and oncologic resection with lymphadenectomy can be considered. Prospective and controlled studies are needed in the future.
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Affiliation(s)
- Masayuki Tanaka
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany.,Department of Surgery, Keio University, School of Medicine, Tokyo, Japan
| | - Max Heckler
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany
| | - André L Mihaljevic
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany
| | - Pascal Probst
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany
| | - Ulla Klaiber
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany
| | - Ulrike Heger
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany
| | - Simon Schimmack
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany
| | - Markus W Büchler
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany
| | - Thilo Hackert
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany.
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