Abstract
Purpose
To investigate the computed tomography (CT) features of heterotopic pancreas of the jejunum (HPJ) and to assess their associations with HPJ pathology features.
Methods
In this retrospective series analysis, two radiologists reviewed the CT images of 17 patients with surgically proven HPJ in order to determine in consensus the location, long diameter, margin, shape, contour, and growth pattern of the lesions, the presence of a duct-like structure, the lesion enhancement patterns, including the homogeneity, and the degree of contrast enhancement compared with that of the main pancreas. The pathology features of the surgical specimens were reviewed and their associations with the CT features were assessed.
Results
On CT, the HPJs typically appeared as a small (<3 cm), well-defined, ovoid or flat-shaped mass in the proximal jejunum with multiple and tiny lobulations. The growth pattern varied and the duct-like structure was rarely visible. The HPJs mostly appeared to be homogeneous and exhibited hyper- or isoattenuation compared to the main pancreas in the arterial and portal phases. However, these enhancement patterns varied slightly depending on the microscopic composition of the lesions (i.e., acinar vs. ductal predominance). Most HPJs comprised histologically of large acini, some ducts, and small islet cells, and had ductal communication with the jejunum.
Conclusions
HPJs typically manifested as small, well-defined, ovoid or flat-shaped, homogeneous, and well-enhancing masses with a microlobulated contour in the proximal jejunum on CT, and their enhancement patterns associated with their microscopic composition. The pathology features of HPJs generally mimic those of the normal pancreas.
Similar content being viewed by others
References
Dolan RV, ReMine WH, Dockerty MB (1974) The fate of heterotopic pancreatic tissue. A study of 212 cases. Arch Surg 109(6):762–765
Lai EC, Tompkins RK (1986) Heterotopic pancreas. Review of a 26 year experience. Am J Surg 151(6):697–700
Hsia CY, Wu CW, Lui WY (1999) Heterotopic pancreas: a difficult diagnosis. J Clin Gastroenterol 28(2):144–147
Ginsburg M, Ahmed O, Rana KA, et al. (2013) Ectopic pancreas presenting with pancreatitis and a mesenteric mass. J Pediatr Surg 48(1):e29–e32
Shin SS, Jeong YY, Kang HK (2007) Giant heterotopic pancreas in the jejunal mesentery. AJR Am J Roentgenol 189(5):W262–W263
Park SH, Han JK, Choi BI, et al. (2000) Heterotopic pancreas of the stomach: CT findings correlated with pathologic findings in six patients. Abdom Imaging 25(2):119–123
Cho JS, Shin KS, Kwon ST, et al. (2000) Heterotopic pancreas in the stomach: CT findings. Radiology 217(1):139–144
Kim JY, Lee JM, Kim KW, et al. (2009) Ectopic pancreas: CT findings with emphasis on differentiation from small gastrointestinal stromal tumor and leiomyoma. Radiology 252(1):92–100
Wei R, Wang QB, Chen QH, et al. (2011) Upper gastrointestinal tract heterotopic pancreas: findings from CT and endoscopic imaging with histopathologic correlation. Clin Imaging 35(5):353–359
Jang KM, Kim SH, Park HJ, et al. (2013) Ectopic pancreas in upper gastrointestinal tract: MRI findings with emphasis on differentiation from submucosal tumor. Acta Radiol 54(10):1107–1116
Makhlouf HR, Almeida JL, Sobin LH (1999) Carcinoma in jejunal pancreatic heterotopia. Arch Pathol Lab Med 123(8):707–711
Okuhata Y, Maebayashi T, Furuhashi S, et al. (2010) Characteristics of ectopic pancreas in dynamic gadolinium-enhanced MRI. Abdom Imaging 35(1):85–87
Sandrasegaran K, Maglinte DD, Cummings OW (2006) Heterotopic pancreas: presentation as jejunal tumor. AJR Am J Roentgenol 187(6):W607–W609
Wang C, Kuo Y, Yeung K, et al. (1998) CT appearance of ectopic pancreas: a case report. Abdom Imaging 23(3):332–333
Wong JC, Robinson C, Jones EC, et al. (2011) Recurrent ectopic pancreatitis of the jejunum and mesentery over a 30-year period. Hepatobiliary Pancreat Dis Int 10(2):218–220
Choi WH, Chang HJ, Seung JH, et al. (2013) A case of a jejunal ectopic pancreas presenting as obscure gastrointestinal bleeding. Korean J Gastroenterol 62(3):165–168
Borghei P, Sokhandon F, Shirkhoda A, Morgan DE (2013) Anomalies, anatomic variants, and sources of diagnostic pitfalls in pancreatic imaging. Radiology 266(1):28–36
Silva AC, Charles JC, Kimery BD, et al. (2006) MR Cholangiopancreatography in the detection of symptomatic ectopic pancreatitis in the small-bowel mesentery. AJR Am J Roentgenol 187(2):W195–W197
Seo N, Kim JH (2014) Characteristic CT features of heterotopic pancreas of the mesentery: “another pancreas” in the mesentery. Clin Imaging 38(1):27–30
Lee NK, Kim S, Kim GH, et al. (2010) Hypervascular subepithelial gastrointestinal masses: CT-pathologic correlation. Radiographics 30(7):1915–1934
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Kim, D.W., Kim, J.H., Park, S.H. et al. Heterotopic pancreas of the jejunum: associations between CT and pathology features. Abdom Imaging 40, 38–45 (2015). https://doi.org/10.1007/s00261-014-0177-y
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00261-014-0177-y