Cystic Tumors Other than IPMN
When to Observe, When to Operate, and Optimal Surgical Approach
John W. Kunstman
Department of Surgery, Section of Surgical Oncology, Yale University School of Medicine, New Haven, CT, USA
VA Connecticut Health System, Department of Veterans Affairs, West Haven, CT, USA
Search for more papers by this authorJames J. Farrell
Yale Pancreatic Disease Program, Interventional Endoscopy and Pancreatic Disease, Yale University School of Medicine, New Haven, CT, USA
Search for more papers by this authorJohn W. Kunstman
Department of Surgery, Section of Surgical Oncology, Yale University School of Medicine, New Haven, CT, USA
VA Connecticut Health System, Department of Veterans Affairs, West Haven, CT, USA
Search for more papers by this authorJames J. Farrell
Yale Pancreatic Disease Program, Interventional Endoscopy and Pancreatic Disease, Yale University School of Medicine, New Haven, CT, USA
Search for more papers by this authorJ. Enrique Domínguez-Muñoz MD, PhD
Director
Department of Gastroenterology and Hepatology, University Hospital of Santiago de Compostela, Santiago de Compostela, Spain
Search for more papers by this authorSummary
Management of cystic lesions of the pancreas can represent one of the most vexing clinical issues faced by the pancreatic specialist. The natural history of these lesions can range from wholly benign to overt malignancy, further increasing the anxiety of both practitioner and patient. This chapter addresses these dilemmas and presents a framework for successful management of these neoplastic cystic lesions. The most common premalignant cystic lesion of the pancreas is intraductal papillary mucinous neoplasm (IPMN). The chapter focuses on cystic neoplasms of the pancreas other than IPMN, such as mucinous cystic neoplasm (MCN), serous cystadenoma, cystic pancreatic endocrine neoplasms, solid pseudopapillary neoplasm, and other less common lesions. Longitudinal series demonstrate that only a minority of cystic lesions ultimately undergo surgical intervention. MCNs are one of two frequently encountered mucin-containing lesions of the pancreas, the other being IPMN.
References
- Gardner TB, Glass LM, Smith KD, et al. Pancreatic cyst prevalence and the risk of mucin-producing adenocarcinoma in US adults. Am J Gastroenterol 2013; 108(10): 1546–1550.
- de Jong K, Nio CY, Hermans JJ, et al. High prevalence of pancreatic cysts detected by screening magnetic resonance imaging examinations. Clin Gastroenterol Hepatol 2010; 8(9): 806–811.
- Laffan TA, Horton KM, Klein AP, et al. Prevalence of unsuspected pancreatic cysts on MDCT. AJR Am J Roentgenol 2008; 191(3): 802–807.
- Kimura W, Nagai H, Kuroda A, et al. Analysis of small cystic lesions of the pancreas. Int J Pancreatol 1995; 18(3): 197–206.
- Lee KS, Sekhar A, Rofsky NM, Pedrosa I. Prevalence of incidental pancreatic cysts in the adult population on MR imaging. Am J Gastroenterol 2010; 105(9): 2079–2084.
- Mella JM, Gomez EJ, Omodeo M, et al. Prevalence of incidental clinically relevant pancreatic cysts at diagnosis based on current guidelines. Gastroenterol Hepatol 2018; 41(5): 293–301.
- Stark A, Donahue TR, Reber HA, Hines OJ. Pancreatic cyst disease: a review. JAMA 2016; 315(17): 1882–1893.
- Fernandez-del Castillo C, Targarona J, Thayer SP, et al. Incidental pancreatic cysts: clinicopathologic characteristics and comparison with symptomatic patients. Arch Surg 2003; 138(4): 427–423; discussion 433–434.
- Walsh RM, Henderson JM, Vogt DP, et al. Prospective preoperative determination of mucinous pancreatic cystic neoplasms. Surgery 2002; 132(4): 628–633; discussion 633–634.
- Matsubara S, Tada M, Akahane M, et al. Incidental pancreatic cysts found by magnetic resonance imaging and their relationship with pancreatic cancer. Pancreas 2012; 41(8): 1241–1246.
- Tanaka S, Nakao M, Ioka T, et al. Slight dilatation of the main pancreatic duct and presence of pancreatic cysts as predictive signs of pancreatic cancer: a prospective study. Radiology 2010; 254(3): 965–972.
- Hruban RH, Verbeke CS. Cystic Tumors of the Pancreas: Diagnosis and Treatment. New York: Springer, 2016.
- Valsangkar NP, Morales-Oyarvide V, Thayer SP, et al. 851 resected cystic tumors of the pancreas: a 33-year experience at the Massachusetts General Hospital. Surgery 2012; 152(3 Suppl 1): S4–S12.
- Gaujoux S, Brennan MF, Gonen M, et al. Cystic lesions of the pancreas: changes in the presentation and management of 1,424 patients at a single institution over a 15-year time period. J Am Coll Surg 2011; 212(4): 590–600.
- Compagno J, Oertel JE. Mucinous cystic neoplasms of the pancreas with overt and latent malignancy (cystadenocarcinoma and cystadenoma). A clinicopathologic study of 41 cases. Am J Clin Pathol 1978; 69(6): 573–580.
- Izumo A, Yamaguchi K, Eguchi T, et al. Mucinous cystic tumor of the pancreas: immunohistochemical assessment of “ovarian-type stroma”. Oncol Rep 2003; 10(3): 515–525.
- Kosmahl M, Pauser U, Peters K, et al. Cystic neoplasms of the pancreas and tumor-like lesions with cystic features: a review of 418 cases and a classification proposal. Virchows Arch 2004; 445(2): 168–178.
- Thompson LD, Becker RC, Przygodzki RM, et al. Mucinous cystic neoplasm (mucinous cystadenocarcinoma of low-grade malignant potential) of the pancreas: a clinicopathologic study of 130 cases. Am J Surg Pathol 1999; 23(1): 1–16.
- Zamboni G, Scarpa A, Bogina G, et al. Mucinous cystic tumors of the pancreas: clinicopathological features, prognosis, and relationship to other mucinous cystic tumors. Am J Surg Pathol 1999; 23(4): 410–422.
- Crippa S, Salvia R, Warshaw AL, et al. Mucinous cystic neoplasm of the pancreas is not an aggressive entity: lessons from 163 resected patients. Ann Surg 2008; 247(4): 571–579.
- Park JW, Jang JY, Kang MJ, et al. Mucinous cystic neoplasm of the pancreas: is surgical resection recommended for all surgically fit patients? Pancreatology 2014; 14(2): 131–136.
- Reddy RP, Smyrk TC, Zapiach M, et al. Pancreatic mucinous cystic neoplasm defined by ovarian stroma: demographics, clinical features, and prevalence of cancer. Clin Gastroenterol Hepatol 2004; 2(11): 1026–1031.
-
Tatsuta M, Iishi H, Ichii M, et al. Values of carcinoembryonic antigen, elastase 1, and carbohydrate antigen determinant in aspirated pancreatic cystic fluid in the diagnosis of cysts of the pancreas. Cancer
1986; 57(9): 1836–1839.
10.1002/1097-0142(19860501)57:9<1836::AID-CNCR2820570922>3.0.CO;2-D CAS PubMed Web of Science® Google Scholar
- Pinto MM, Meriano FV. Diagnosis of cystic pancreatic lesions by cytologic examination and carcinoembryonic antigen and amylase assays of cyst contents. Acta Cytol 1991; 35(4): 456–463.
- Lewandrowski KB, Southern JF, Pins MR, et al. Cyst fluid analysis in the differential diagnosis of pancreatic cysts. A comparison of pseudocysts, serous cystadenomas, mucinous cystic neoplasms, and mucinous cystadenocarcinoma. Ann Surg 1993; 217(1): 41–47.
- Hammel P, Levy P, Voitot H, et al. Preoperative cyst fluid analysis is useful for the differential diagnosis of cystic lesions of the pancreas. Gastroenterology 1995; 108(4): 1230–1235.
- Bick BL, Enders FT, Levy MJ, et al. The string sign for diagnosis of mucinous pancreatic cysts. Endoscopy 2015; 47(7): 626–631.
- Maker AV, Hu V, Kadkol SS, et al. Cyst fluid biosignature to predict intraductal papillary mucinous neoplasms of the pancreas with high malignant potential. J Am Coll Surg 2019; 228(5): 721–729.
- Brugge WR, Lewandrowski K, Lee-Lewandrowski E, et al. Diagnosis of pancreatic cystic neoplasms: a report of the cooperative pancreatic cyst study. Gastroenterology 2004; 126(5): 1330–1336.
- Kloppel G, Kosmahl M. Cystic lesions and neoplasms of the pancreas. The features are becoming clearer. Pancreatology 2001; 1(6): 648–655.
- Nilsson LN, Keane MG, Shamali A, et al. Nature and management of pancreatic mucinous cystic neoplasm (MCN): a systematic review of the literature. Pancreatology 2016; 16(6): 1028–1036.
- European Study Group on Cystic Tumours of the Pancreas. European evidence-based guidelines on pancreatic cystic neoplasms. Gut 2018; 67(5): 789–804.
- Javadi S, Menias CO, Korivi BR, et al. Pancreatic calcifications and calcified pancreatic masses: pattern recognition approach on CT. AJR Am J Roentgenol 2017; 209(1): 77–87.
- Procacci C, Carbognin G, Accordini S, et al. CT features of malignant mucinous cystic tumors of the pancreas. Eur Radiol 2001; 11(9): 1626–1630.
- Di Paola V, Manfredi R, Mehrabi S, et al. Pancreatic mucinous cystoadenomas and cystoadenocarcinomas: differential diagnosis by means of MRI. Br J Radiol 2016; 89(1057): 20150536.
- Tanaka M, Fernandez-del Castillo C, Adsay V, et al. International consensus guidelines 2012 for the management of IPMN and MCN of the pancreas. Pancreatology 2012; 12(3): 183–197.
- Postlewait LM, Ethun CG, McInnis MR, et al. Association of preoperative risk factors with malignancy in pancreatic mucinous cystic neoplasms: a multicenter study. JAMA Surg 2017; 152(1): 19–25.
- Ethun CG, Postlewait LM, McInnis MR, et al. The diagnosis of pancreatic mucinous cystic neoplasm and associated adenocarcinoma in males: an eight-institution study of 349 patients over 15 years. J Surg Oncol 2017; 115(7): 784–787.
- Allen PJ, D'Angelica M, Gonen M, et al. A selective approach to the resection of cystic lesions of the pancreas: results from 539 consecutive patients. Ann Surg 2006; 244(4): 572–582.
- Kosumi K, Takamori H, Hashimoto D, et al. Mucinous cystic neoplasm of the pancreas activated during pregnancy. Surg Case Rep 2015; 1(1): 13.
- Takashima S, Wato M, Inaba T, et al. A case of pancreatic mucinous cystic neoplasm that enlarged during pregnancy and was resected after childbirth. Nihon Shokakibyo Gakkai Zasshi 2014; 111(9): 1789–1797.
- Naganuma S, Honda K, Noriki S, et al. Ruptured mucinous cystic neoplasm with an associated invasive carcinoma of pancreatic head in a pregnant woman: report of a case and review of literature. Pathol Int 2011; 61(1): 28–33.
- Callery MP, Pratt WB, Kent TS, et al. A prospectively validated clinical risk score accurately predicts pancreatic fistula after pancreatoduodenectomy. J Am Coll Surg 2013; 216(1): 1–14.
-
HG Beger, S Matsuno, JL Cameron (eds) Diseases of the Pancreas: Current Surgical Therapy. New York: Springer, 2008.
10.1007/978-3-540-28656-1 Google Scholar
- Le Borgne J, de Calan L, Partensky C. Cystadenomas and cystadenocarcinomas of the pancreas: a multiinstitutional retrospective study of 398 cases. Ann Surg 1999; 230(2): 152–161.
- Warshaw AL, Compton CC, Lewandrowski K, et al. Cystic tumors of the pancreas. New clinical, radiologic, and pathologic observations in 67 patients. Ann Surg 1990; 212(4): 432–443; discussion 444–445.
- George DH, Murphy F, Michalski R, Ulmer BG. Serous cystadenocarcinoma of the pancreas: a new entity? Am J Surg Pathol 1989; 13(1): 61–66.
- Jais B, Rebours V, Malleo G, et al. Serous cystic neoplasm of the pancreas: a multinational study of 2622 patients under the auspices of the International Association of Pancreatology and European Pancreatic Club (European Study Group on Cystic Tumors of the Pancreas). Gut 2016; 65(2): 305–312.
- Lewandrowski K, Warshaw A, Compton C. Macrocystic serous cystadenoma of the pancreas: a morphologic variant differing from microcystic adenoma. Hum Pathol 1992; 23(8): 871–875.
- Compton CC. Serous cystic tumors of the pancreas. Semin Diagn Pathol 2000; 17(1): 43–55.
- Tseng JF, Warshaw AL, Sahani DV, et al. Serous cystadenoma of the pancreas: tumor growth rates and recommendations for treatment. Ann Surg 2005; 242(3): 413–419; discussion 419–421.
- Perez-Ordonez B, Naseem A, Lieberman PH, Klimstra DS. Solid serous adenoma of the pancreas. The solid variant of serous cystadenoma? Am J Surg Pathol 1996; 20(11): 1401–1405.
- Bassi C, Salvia R, Molinari E, et al. Management of 100 consecutive cases of pancreatic serous cystadenoma: wait for symptoms and see at imaging or vice versa? World J Surg 2003; 27(3): 319–323.
- Frossard JL, Amouyal P, Amouyal G, et al. Performance of endosonography-guided fine needle aspiration and biopsy in the diagnosis of pancreatic cystic lesions. Am J Gastroenterol 2003; 98(7): 1516–1524.
- Vortmeyer AO, Lubensky IA, Fogt F, et al. Allelic deletion and mutation of the von Hippel–Lindau (VHL) tumor suppressor gene in pancreatic microcystic adenomas. Am J Pathol 1997; 151(4): 951–956.
- Thirabanjasak D, Basturk O, Altinel D, et al. Is serous cystadenoma of the pancreas a model of clear-cell-associated angiogenesis and tumorigenesis? Pancreatology 2009; 9(1–2): 182–188.
- Yip-Schneider MT, Wu H, Dumas RP, et al. Vascular endothelial growth factor, a novel and highly accurate pancreatic fluid biomarker for serous pancreatic cysts. J Am Coll Surg 2014; 218(4): 608–617.
- Horton WA, Wong V, Eldridge R. Von Hippel–Lindau disease: clinical and pathological manifestations in nine families with 50 affected members. Arch Intern Med 1976; 136(7): 769–777.
- Neumann HP, Dinkel E, Brambs H, et al. Pancreatic lesions in the von Hippel–Lindau syndrome. Gastroenterology 1991; 101(2): 465–471.
- Strobel O, Z'Graggen K, Schmitz-Winnenthal FH, et al. Risk of malignancy in serous cystic neoplasms of the pancreas. Digestion 2003; 68(1): 24–33.
- Pyke CM, van Heerden JA, Colby TV, et al. The spectrum of serous cystadenoma of the pancreas. Clinical, pathologic, and surgical aspects. Ann Surg 1992; 215(2): 132–139.
- Friebe V, Keck T, Mattern D, et al. Serous cystadenocarcinoma of the pancreas: management of a rare entity. Pancreas 2005; 31(2): 182–187.
- Chalian H, Tore HG, Rezai P, et al. MDCT evaluation of the growth kinetics of serous and benign mucinous cystic neoplasms of the pancreas. Cancer Imaging 2011; 11: 116–122.
- El-Hayek KM, Brown N, O'Rourke C, et al. Rate of growth of pancreatic serous cystadenoma as an indication for resection. Surgery 2013; 154(4): 794–800.
- Sakorafas GH, Smyrniotis V, Reid-Lombardo KM, Sarr MG. Primary pancreatic cystic neoplasms revisited. Part I: serous cystic neoplasms. Surg Oncol 2011; 20(2): e84–e92.
- Mehrabi A, Hafezi M, Arvin J, et al. A systematic review and meta-analysis of laparoscopic versus open distal pancreatectomy for benign and malignant lesions of the pancreas: it's time to randomize. Surgery 2015; 157(1): 45–55.
- Faitot F, Gaujoux S, Barbier L, et al. Reappraisal of pancreatic enucleations: a single-center experience of 126 procedures. Surgery 2015; 158(1): 201–210.
- Goudard Y, Gaujoux S, Dokmak S, et al. Reappraisal of central pancreatectomy: a 12-year single-center experience. JAMA Surg 2014; 149(4): 356–363.
- Iacono C, Verlato G, Ruzzenente A, et al. Systematic review of central pancreatectomy and meta-analysis of central versus distal pancreatectomy. Br J Surg 2013; 100(7): 873–885.
- Kalil AN, Lichtenfels E, Fornari A, et al. Management of cystic neoplasms of the pancreas. Hepatogastroenterology 2002; 49(47): 1432–1435.
- Huh J, Byun JH, Hong SM, et al. Malignant pancreatic serous cystic neoplasms: systematic review with a new case. BMC Gastroenterol 2016; 16(1): 97.
- Das A, Wells CD, Nguyen CC. Incidental cystic neoplasms of pancreas: what is the optimal interval of imaging surveillance? Am J Gastroenterol 2008; 103(7): 1657–1662.
- Vassos N, Agaimy A, Klein P, et al. Solid-pseudopapillary neoplasm (SPN) of the pancreas: case series and literature review on an enigmatic entity. Int J Clin Exp Pathol 2013; 6(6): 1051–1059.
- Law JK, Ahmed A, Singh VK, et al. A systematic review of solid-pseudopapillary neoplasms: are these rare lesions? Pancreas 2014; 43(3): 331–337.
- Yu PF, Hu ZH, Wang XB, et al. Solid pseudopapillary tumor of the pancreas: a review of 553 cases in Chinese literature. World J Gastroenterol 2010; 16(10): 1209–1214.
- Papavramidis T, Papavramidis S. Solid pseudopapillary tumors of the pancreas: review of 718 patients reported in English literature. J Am Coll Surg 2005; 200(6): 965–972.
- Reddy S, Cameron JL, Scudiere J, et al. Surgical management of solid-pseudopapillary neoplasms of the pancreas (Franz or Hamoudi tumors): a single-institutional series. J Am Coll Surg 2009; 208: 950–959.
- Butte JM, Brennan MF, Gonen M, et al. Solid pseudopapillary tumors of the pancreas. Clinical features, surgical outcomes, and long-term survival in 45 consecutive patients from a single center. J Gastrointest Surg 2011; 15(2): 350–357.
- Naar L, Spanomichou DA, Mastoraki A, et al. Solid pseudopapillary neoplasms of the pancreas: a surgical and genetic enigma. World J Surg 2017; 41(7): 1871–1881.
- El-Bahrawy MA, Rowan A, Horncastle D, et al. E-cadherin/catenin complex status in solid pseudopapillary tumor of the pancreas. Am J Surg Pathol 2008; 32(1): 1–7.
- Tanaka Y, Kato K, Notohara K, et al. Frequent beta-catenin mutation and cytoplasmic/nuclear accumulation in pancreatic solid-pseudopapillary neoplasm. Cancer Res 2001; 61(23): 8401–8404.
- Chetty R, Serra S. Loss of expression of E-cadherin in solid pseudopapillary tumors of the pancreas. Pancreas 2009; 38(3): 338; author reply 338–339.
- Abraham SC, Klimstra D, Wilentz RE, et al. Solid-pseudopapillary tumors of teh pancreas are genetically distinct from pancreatic ductal adenocarcinomas and almost always harbor beta-catenin mutations. Am J Pathol 2002; 160(4): 1361–1369.
- Geers C, Moulin P, Gigot JF, et al. Solid and pseudopapillary tumor of the pancreas: review and new insights into pathogenesis. Am J Surg Pathol 2006; 30(10): 1243–1249.
- Morales A, Ruiz Molina JM, Esteves HO, et al. Papillary-cystic neoplasm of the pancreas. A sex-steroid dependent tumor. Int J Pancreatol 1998; 24(3): 219–225.
- Law JK, Stoita A, Wever W, et al. Endoscopic ultrasound-guided fine needle aspiration improves the pre-operative diagnostic yield of solid-pseudopapillary neoplasm of the pancreas: an international multicenter case series (with video). Surg Endosc 2014; 28(9): 2592–2598.
- Serra S, Chetty R. Revision 2: an immunohistochemical approach and evaluation of solid pseudopapillary tumour of the pancreas. J Clin Pathol 2008; 61(11): 1153–1159.
- Burford H, Baloch Z, Liu X, et al. E-cadherin/beta-catenin and CD10: a limited immunohistochemical panel to distinguish pancreatic endocrine neoplasm from solid pseudopapillary neoplasm of the pancreas on endoscopic ultrasound-guided fine-needle aspirates of the pancreas. Am J Clin Pathol 2009; 132(6): 831–839.
- Hosokawa I, Shimizu H, Ohtsuka M, et al. Preoperative diagnosis and surgical management for solid pseudopapillary neoplasm of the pancreas. J Hepatobiliary Pancreat Sci 2014; 21(8): 573–578.
- Karsenti D, Caillol F, Chaput U, et al. Safety of endoscopic ultrasound-guided fine-needle aspiration for pancreatic solid pseudopapillary neoplasm before surgical resection: a European Multicenter Registry-based study on 149 patients. Pancreas 2020; 49(1): 34–38.
- Tan HL, Syn N, Goh BKP. Systematic review and meta-analysis of minimally invasive pancreatectomies for solid pseudopapillary neoplasms of the pancreas. Pancreas 2019; 48(10): 1334–1342.
- Tan HL, Tan EK, Teo JY, et al. Outcome of minimally-invasive versus open pancreatectomies for solid pseudopapillary neoplasms of the pancreas: a 2:1 matched case-control study. Ann Hepatobiliary Pancreat Surg 2019; 23(3): 252–257.
- Lubezky N, Papoulas M, Lessing Y, et al. Solid pseudopapillary neoplasm of the pancreas: management and long-term outcome. Eur J Surg Oncol 2017; 43(6): 1056–1060.
- Kim CW, Han DJ, Kim J, et al. Solid pseudopapillary tumor of the pancreas: can malignancy be predicted? Surgery 2011; 149(5): 625–634.
- Kang CM, Choi SH, Kim SC, et al. Predicting recurrence of pancreatic solid pseudopapillary tumors after surgical resection: a multicenter analysis in Korea. Ann Surg 2014; 260(2): 348–355.
-
Fried P, Cooper J, Balthazar E, et al. A role for radiotherapy in the treatment of solid and papillary neoplasms of the pancreas. Cancer
1985; 56(12): 2783–2785.
10.1002/1097-0142(19851215)56:12<2783::AID-CNCR2820561211>3.0.CO;2-Q CAS PubMed Web of Science® Google Scholar
- Hao EIU, Hwang HK, Yoon DS, et al. Aggressiveness of solid pseudopapillary neoplasm of the pancreas: a literature review and meta-analysis. Medicine (Baltimore) 2018; 97(49): e13147.
- Gaujoux S, Tang L, Klimstra D, et al. The outcome of resected cystic pancreatic endocrine neoplasms: a case-matched analysis. Surgery 2012; 151(4): 518–525.
- Boninsegna L, Partelli S, D'Innocenzio MM, et al. Pancreatic cystic endocrine tumors: a different morphological entity associated with a less aggressive behavior. Neuroendocrinology 2010; 92(4): 246–251.
- Bordeianou L, Vagefi PA, Sahani DV, et al. Cystic pancreatic endocrine neoplams: a distinct tumor type? J Am Coll Surg 2008; 206(6): 1154–1158.
- Hurtado-Pardo L, Cienfuegos JA, Ruiz-Canela M, et al. Cystic pancreatic neuroendocrine tumors (cPNETs): a systematic review and meta-analysis of case series. Rev Esp Enferm Dig 2017; 109(11): 778–787.
- Federle MP, McGrath KM. Cystic neoplasms of the pancreas. Gastroenterol Clin North Am 2007; 36(2): 365–376, ix.
- Singhi AD, Chu LC, Tatsas AD, et al. Cystic pancreatic neuroendocrine tumors: a clinicopathologic study. Am J Surg Pathol 2012; 36(11): 1666–1673.
- Ho HC, Eloubeidi MA, Siddiqui UD, et al. Endosonographic and cyst fluid characteristics of cystic pancreatic neuroendocrine tumours: a multicentre case series. Dig Liver Dis 2013; 45(9): 750–753.
- Ligneau B, Lombard-Bohas C, Partensky C, et al. Cystic endocrine tumors of the pancreas: clinical, radiologic, and histopathologic features in 13 cases. Am J Surg Pathol 2001; 25(6): 752–760.
- Kongkam P, Al-Haddad M, Attasaranya S, et al. EUS and clinical characteristics of cystic pancreatic neuroendocrine tumors. Endoscopy 2008; 40(7): 602–605.
- Goh BK, Ooi LL, Tan YM, et al. Clinico-pathological features of cystic pancreatic endocrine neoplasms and a comparison with their solid counterparts. Eur J Surg Oncol 2006; 32(5): 553–556.
- Yoon WJ, Daglilar ES, Pitman MB, Brugge WR. Cystic pancreatic neuroendocrine tumors: endoscopic ultrasound and fine-needle aspiration characteristics. Endoscopy 2013; 45(3): 189–194.
- Davtyan H, Nieberg R, Reber HA. Pancreatic cystic endocrine neoplasms. Pancreas 1990; 5(2): 230–233.
- Kamisawa T, Fukayama M, Koike M, et al. A case of malignant cystic endocrine tumor of the pancreas. Am J Gastroenterol 1987; 82(1): 86–89.
- Fernandez-del Castillo C, Warshaw AL. Cystic tumors of the pancreas. Surg Clin North Am 1995; 75(5): 1001–1016.
- Ridtitid W, Halawi H, DeWitt JM, et al. Cystic pancreatic neuroendocrine tumors: outcomes of preoperative endosonography-guided fine needle aspiration, and recurrence during long-term follow-up. Endoscopy 2015; 47(7): 617–625.
- Lee LC, Grant CS, Salomao DR, et al. Small, nonfunctioning, asymptomatic pancreatic neuroendocrine tumors (PNETs): role for nonoperative management. Surgery 2012; 152(6): 965–974.
- Gaujoux S, Partelli S, Maire F, et al. Observational study of natural history of small sporadic nonfunctioning pancreatic neuroendocrine tumors. J Clin Endocrinol Metab 2013; 98(12): 4784–4789.
- Haynes AB, Deshpande V, Ingkakul T, et al. Implications of incidentally discovered, nonfunctioning pancreatic endocrine tumors: short-term and long-term patient outcomes. Arch Surg 2011; 146(5): 534–538.
- Kuo EJ, Salem RR. Population-level analysis of pancreatic neuroendocrine tumors 2 cm or less in size. Ann Surg Oncol 2013; 20(9): 2815–2821.
- Kunz PL, Reidy-Lagunes D, Anthony LB, et al. consensus guidelines for the management and treatment of neuroendocrine tumors. Pancreas 2013; 42(4): 557–577.
- Falconi M, Eriksson B, Kaltsas G, 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(2): 153–171.
- Mege D, Gregoire E, Barbier L, et al. Lymphoepithelial cyst of the pancreas: an analysis of 117 patients. Pancreas 2014; 43(7): 987–995.
- Osiro S, Rodriguez JR, Tiwari KJ, et al. Is preoperative diagnosis possible? A clinical and radiological review of lymphoepithelial cysts of the pancreas. JOP 2013; 14(1): 15–20.
- Nasr J, Sanders M, Fasanella K, et al. Lymphoepithelial cysts of the pancreas: an EUS case series. Gastrointest Endosc 2008; 68(1): 170–173.
- Bihari C, Rastogi A, Rajesh S, et al. Cystic lymphangioma of pancreas. Indian J Surg Oncol 2016; 7(1): 106–109.
- Coe A, Conway J, Evans J, et al. The yield of EUS-FNA in undiagnosed upper abdominal adenopathy is very high. J Clin Ultrasound 2013; 41(4): 210–213.
- Viscosi F, Fleres F, Mazzeo C, et al. Cystic lymphangioma of the pancreas: a hard diagnostic challenge between pancreatic cystic lesions. Review of recent literature. Gland Surg 2018; 7(5): 487–492.
- Jathal A, Arsenescu R, Crowe G, et al. Diagnosis of pancreatic cystic lymphangioma with EUS-guided FNA: report of a case. Gastrointest Endosc 2005; 61(7): 920–922.
- Bhatia V, Rastogi A, Saluja SS, et al. Cystic pancreatic lymphangioma. The first report of a preoperative pathological diagnosis by endoscopic ultrasound-guided cyst aspiration. JOP 2011; 12(5): 473–476.
- Chen D, Feng X, Lv Z, et al. Cystic lymphangioma of pancreas: a rare case report and review of the literature. Medicine (Baltimore) 2018; 97(28): e11238.
- Paik KY, Choi SH, Heo JS, Choi DW. Solid tumors of the pancreas can put on a mask through cystic change. World J Surg Oncol 2011; 9: 79.