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Intrapancreatic accessory spleen: findings on MR Imaging, CT, US and scintigraphy, and the pathologic analysis

Cited 69 time in Web of Science Cited 69 time in Scopus
Authors
Kim, Se Hyung; Lee, Jeong Min; Han, Joon Koo; Lee, Jae Young; Kim, Kyoung Won; Cho, Kyunghee C; Choi, Byung Ihn
Issue Date
2008-04-04
Publisher
Korean Radiological Society
Citation
Korean J Radiol 2008;9(2):162-174
Keywords
Choristoma/*diagnosisDiagnosis, Differential*Diagnostic ImagingHumansPancreatic Diseases/*diagnosisPancreatic Neoplasms/diagnosis*Spleen
Abstract
Although the tail of the pancreas is the second most common site of an accessory spleen, intrapancreatic accessory spleen (IPAS) has rarely been noted radiologically. However, as the imaging techniques have recently advanced, IPAS will be more frequently detected as an incidental pancreatic nodule on CT or MRI. Because accessory spleens usually pose no clinical problems, it is important to characterize accessory spleens as noninvasively as possible. An IPAS has similar characteristics to those of the spleen on the precontrast and contrast-enhanced images of all the imaging modalities. In particular, inhomogeneous enhancement of an IPAS in its early phases may be a diagnostic clue. Superparamagnetic iron oxide (SPIO)-enhanced MRI and Levovist-enhanced US, and the mechanisms of which are theoretically similar to that of Tc-99m scintigraphy, can be used as alternative tools to confirm the diagnosis of IPAS. An IPAS shows a significant signal drop similar to the spleen on the SPIO-enhanced T2 or T2*-weighted imaging and prolonged enhancement on the delayed hepatosplenic phase of contrast-enhanced US. We review and illustrate the differential points between IPAS and hypervascular pancreatic tumors in this manuscript.
ISSN
1229-6929 (Print)
Language
English
URI
https://hdl.handle.net/10371/62732
DOI
https://doi.org/10.3348/kjr.2008.9.2.162
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College of Medicine/School of Medicine (의과대학/대학원)Radiology (영상의학전공)Journal Papers (저널논문_영상의학전공)
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