| Incidental Neuroendocrine Tumors of the Pancreas: MDCT Findings and Features of Malignancy. | |
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MedLine Citation:
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PMID: 23345357 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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OBJECTIVE: The objective of our study was to evaluate the MDCT features of incidentally detected neuroendocrine tumors (NETs) of the pancreas, identify features that can predict tumor biology or aggressiveness and long-term outcome, and determine the incidence of "nonbenign" behavior. MATERIALS AND METHODS: In this retrospective study, 60 histologically verified pancreatic NETs incidentally detected with contrast-enhanced MDCT were included. Various MDCT features such as size, morphology, enhancement, and presence of calcifications were evaluated and were correlated with tumor biology on histopathology. The sensitivity, specificity, predictive values, and accuracy were calculated for MDCT features in predicting nonbenign biology and risk of recurrence. RESULTS: A total of 32 of 60 (53%) NETs were nonbenign: most were large (mean, 29.1 mm) with a solid or complex pattern. NET size of 3 cm or larger yielded a positive predictive value of 61% for nonbenign tumors and 100% when calcification was present. In 12 patients with recurrence, 92% of NETs were nonbenign. The presence of calcification, local invasion, main pancreatic duct dilatation, vascular invasion, and lymph node enlargement along with angioinvasion and a Ki-67 index greater than 2% on histology were associated with a nonbenign diagnosis and a higher risk of recurrence. CONCLUSION: Approximately 50% of incidental NETs show uncertain or malignant behavior. Solid tumors 3 cm or larger are commonly nonbenign; however, about 30% of tumors smaller than that size cutoff can be malignant. Nonbenign tumors and those with invasive features on MDCT have a higher incidence of recurrence. |
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Authors:
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Anna Gallotti; Rocio Perez Johnston; Pietro A Bonaffini; Thun Ingkakul; Vikram Deshpande; Carlos Fernández-Del Castillo; Dushyant V Sahani |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: AJR. American journal of roentgenology Volume: 200 ISSN: 1546-3141 ISO Abbreviation: AJR Am J Roentgenol Publication Date: 2013 Feb |
Date Detail:
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Created Date: 2013-01-24 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7708173 Medline TA: AJR Am J Roentgenol Country: United States |
Other Details:
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Languages: eng Pagination: 355-62 Citation Subset: AIM; IM |
Affiliation:
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Department of Radiology, University Hospital "G. B. Rossi," University of Verona, Verona, Italy. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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