Abstract
Neuroendocrine tumors (NETs) account for 2% of all malignancies in the United States. A subset of gastroenteropancreatic NETs are pancreatic neuroendocrine tumors (PNETs). PNETs now account for 7% of pancreatic malignancies in the United States in 2020. This chapter discusses the nonsurgical management of PNETs. Medical management for PNETs has improved tremendously and continues to evolve. Medical treatment involves therapy to control hormonal symptoms, decrease tumor burden, control tumor growth, and lengthen survival. Many options exist and require discussions with a multidisciplinary team including medical, surgical, oncological, endoscopic, and radiological treatments. Somatostatin therapy, liver-directed treatment, molecular targeted therapies, systemic chemotherapy, radiotherapy, and EUS-guided therapies are treatment modalities that must be considered when appropriate.
References
Oronsky B, Ma PC, Morgensztern D, Carter CA. Nothing but NET: a review of neuroendocrine tumors and carcinomas. Neoplasia. 2017;19:991–1002.
Simoneaux R. A look at the increasing incidence of neuroendocrine tumors. Oncol Times. 2020;42:1–4.
Key statistics for pancreatic neuroendocrine tumor. https://www.cancer.org/cancer/pancreatic-neuroendocrine-tumor/about/key-statistics.html.
Shin JJ, Gorden P, Libutti SK. Insulinoma: pathophysiology, localization and management. Future Oncol Lond Engl. 2010;6:229–37.
Stueven AK, et al. Somatostatin analogues in the treatment of neuroendocrine tumors: past, present and future. Int J Mol Sci. 2019;20:3049.
Yao JC, et al. Daily oral everolimus activity in patients with metastatic pancreatic neuroendocrine tumors after failure of cytotoxic chemotherapy: a phase II trial. J Clin Oncol Off J Am Soc Clin Oncol. 2010;28:69–76.
Pavel ME, et al. Efficacy of everolimus plus octreotide LAR in patients with advanced neuroendocrine tumor and carcinoid syndrome: final overall survival from the randomized, placebo-controlled phase 3 RADIANT-2 study. Ann Oncol. 2017;28:1569–75.
Rinke A, et al. Placebo-controlled, double-blind, prospective, randomized study on the effect of octreotide LAR in the control of tumor growth in patients with metastatic neuroendocrine midgut tumors: a report from the PROMID Study Group. J Clin Oncol Off J Am Soc Clin Oncol. 2009;27:4656–63.
Caplin ME, et al. Lanreotide in metastatic enteropancreatic neuroendocrine tumors. N Engl J Med. 2014;371:224–33.
Schmid HA. Pasireotide (SOM230): development, mechanism of action and potential applications. Mol Cell Endocrinol. 2008;286:69–74.
van der Hoek J, et al. A single-dose comparison of the acute effects between the new somatostatin analog SOM230 and octreotide in acromegalic patients. J Clin Endocrinol Metab. 2004;89:638–45.
Wolin EM, et al. Phase III study of pasireotide long-acting release in patients with metastatic neuroendocrine tumors and carcinoid symptoms refractory to available somatostatin analogues. Drug Des Devel Ther. 2015;9:5075–86.
Kaderli RM, et al. Therapeutic options for neuroendocrine tumors: a systematic review and network meta-analysis. JAMA Oncol. 2019;5:480–9.
Strosberg J, et al. Phase 3 trial of 177Lu-Dotatate for midgut neuroendocrine tumors. N Engl J Med. 2017;376:125–35.
Nigri G, et al. Treatment options for PNET liver metastases: a systematic review. World J Surg Oncol. 2018;16:142.
Boeti MPS, Grigorie R, Popescu I. Laparoscopic radiofrequency ablation of liver tumors. Hepatic Surg. 2013; https://doi.org/10.5772/52830.
Mazzaglia PJ, Berber E, Milas M, Siperstein AE. Laparoscopic radiofrequency ablation of neuroendocrine liver metastases: a 10-year experience evaluating predictors of survival. Surgery. 2007;142:10–9.
Koumarianou A, et al. Temozolomide in advanced neuroendocrine neoplasms: pharmacological and clinical aspects. Neuroendocrinology. 2015;101:274–88.
Strosberg JR, et al. First-line chemotherapy with capecitabine and temozolomide in patients with metastatic pancreatic endocrine carcinomas. Cancer. 2011;117:268–75.
Kunz PL, et al. A randomized study of temozolomide or temozolomide and capecitabine in patients with advanced pancreatic neuroendocrine tumors: A trial of the ECOG-ACRIN Cancer Research Group (E2211). J Clin Oncol. 2018;36:4004.
de Mestier L, et al. Temozolomide alone or combined with capecitabine for the treatment of advanced pancreatic neuroendocrine tumor. Neuroendocrinology. 2020;110:83–91.
Ducreux M, et al. Bevacizumab combined with 5-FU/streptozocin in patients with progressive metastatic well-differentiated pancreatic endocrine tumours (BETTER trial) – a phase II non-randomised trial. Eur J Cancer Oxf Engl. 2014;1990(50):3098–106.
Chan JA, et al. Prospective study of bevacizumab plus temozolomide in patients with advanced neuroendocrine tumors. J Clin Oncol. 2012;30:2963–8.
Kulke MH, et al. Phase II study of temozolomide and thalidomide in patients with metastatic neuroendocrine tumors. J Clin Oncol Off J Am Soc Clin Oncol. 2006;24:401–6.
Saif MW, et al. A retrospective study of capecitabine/temozolomide (CAPTEM) regimen in the treatment of metastatic pancreatic neuroendocrine tumors (pNETs) after failing previous therapy. J Pancreas. 2013;14:498–501.
Krug S, Gress TM, Michl P, Rinke A. The role of cytotoxic chemotherapy in advanced pancreatic neuroendocrine tumors. Digestion. 2017;96:67–75.
Moertel CG, Lefkopoulo M, Lipsitz S, Hahn RG, Klaassen D. Streptozocin-doxorubicin, streptozocin-fluorouracil or chlorozotocin in the treatment of advanced islet-cell carcinoma. N Engl J Med. 1992;326:519–23.
Krug S, et al. Streptozocin-based chemotherapy in patients with advanced neuroendocrine neoplasms--predictive and prognostic markers for treatment stratification. PLoS One. 2015;10:e0143822.
Efficacy and safety of Everolimus and (STZ-5FU) given one upfront the other upon progression in advanced pancreatic neuroendocrin tumor (pNET) - Full Text View. ClinicalTrials.gov. 2020; https://clinicaltrials.gov/ct2/show/NCT02246127.
Ramanathan RK, Cnaan A, Hahn RG, Carbone PP, Haller DG. Phase II trial of dacarbazine (DTIC) in advanced pancreatic islet cell carcinoma. Study of the Eastern Cooperative Oncology Group-E6282. Ann Oncol. 2001;12:1139–43.
Okusaka T, et al. Cytotoxic chemotherapy for pancreatic neuroendocrine tumors. J Hepato-Biliary-Pancreat Sci. 2015;22:628–33.
Falconi M, et al. ENETS consensus guidelines update for the management of patients with functional pancreatic neuroendocrine tumors and non-functional pancreatic neuroendocrine tumors. Neuroendocrinology. 2016;103:153–71.
Steven Stricker P. From chemotherapy to targeted therapies: current treatment of carcinoid tumors and pancreatic neuroendocrine tumors. 2011.
Fiore F, et al. Transarterial embolization (TAE) is equally effective and slightly safer than transarterial chemoembolization (TACE) to manage liver metastases in neuroendocrine tumors. Endocrine. 2014;47:177–82.
Rossi S, et al. Radiofrequency ablation of pancreatic neuroendocrine tumors: a pilot study of feasibility, efficacy, and safety. Pancreas. 2014;43:938–45.
Oleinikov K, et al. Endoscopic ultrasound-guided radiofrequency ablation: a new therapeutic approach for pancreatic neuroendocrine tumors. J Clin Endocrinol Metab. 2019;104:2637–47.
Barthet M, et al. Endoscopic ultrasound-guided radiofrequency ablation for pancreatic neuroendocrine tumors and pancreatic cystic neoplasms: a prospective multicenter study. Endoscopy. 2019;51:836–42.
Park DH, et al. Endoscopic ultrasonography-guided ethanol ablation for small pancreatic neuroendocrine tumors: results of a pilot study. Clin Endosc. 2015;48:158–64.
Kulke MH, et al. Randomized phase II study of everolimus (E) versus everolimus plus bevacizumab (E+B) in patients (Pts) with locally advanced or metastatic pancreatic neuroendocrine tumors (pNET), CALGB 80701 (Alliance). J Clin Oncol. 2015;33:4005.
Hobday TJ, et al. Multicenter phase II trial of temsirolimus and bevacizumab in pancreatic neuroendocrine tumors. J Clin Oncol Off J Am Soc Clin Oncol. 2015;33:1551–6.
Raymond E, et al. Sunitinib malate for the treatment of pancreatic neuroendocrine tumors. N Engl J Med. 2011;364:501–13.
Faivre S, et al. Sunitinib in pancreatic neuroendocrine tumors: updated progression-free survival and final overall survival from a phase III randomized study. Ann Oncol. 2017;28:339–43.
Lahner H, et al. Sunitinib efficacy in patients with advanced pNET in clinical practice. Horm Metab Res Horm Stoffwechselforschung Horm Metab. 2016;48:575–80.
Yao JC, Strosberg J, Fazio N, Pavel ME, Ruszniewski P, Bergsland E, Li D, Tafuto S, Raj N, Campana D, et al. Activity & safety of spartalizumab (PDR001) in patients (pts) with advanced neuroendocrine tumors (NET) of pancreatic (Pan), gastrointestinal (GI), or thoracic (T) origin, & gastroenteropancreatic neuroendocrine carcinoma (GEP NEC) who have progressed. Ann Oncol. 2018;29:467–8.
Ott PA, et al. T-cell-inflamed gene-expression profile, programmed death ligand 1 expression, and tumor mutational burden predict efficacy in patients treated with pembrolizumab across 20 cancers: KEYNOTE-028. J Clin Oncol Off J Am Soc Clin Oncol. 2019;37:318–27.
Strosberg J, et al. Efficacy and safety of pembrolizumab in previously treated advanced neuroendocrine tumors: results from the phase II KEYNOTE-158 study. Clin Cancer Res Off J Am Assoc Cancer Res. 2020;26:2124–30.
Halperin DM, et al. A phase II trial of atezolizumab and bevacizumab in patients with advanced, progressive neuroendocrine tumors (NETs). J Clin Oncol. 2020;38:619.
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Chouthai, A., Makar, M., Sarkar, A. (2021). Non-surgical Management of Pancreatic Neuroendocrine Tumors (PNETs). In: Doria, C., Rogart, J.N. (eds) Hepato-Pancreato-Biliary Malignancies. Springer, Cham. https://doi.org/10.1007/978-3-030-37482-2_39-1
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DOI: https://doi.org/10.1007/978-3-030-37482-2_39-1
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