Ontology type: schema:ScholarlyArticle
2017-09
AUTHORSJi Hee Kang, Se Hyung Kim, Joon Koo Han
ABSTRACTOBJECTIVE: The differentiation of poorly-differentiated neuroendocrine tumours (PD-NETs), well-differentiated NETs (WD-NETs), and adenocarcinomas (ADCs) is important due to different management options and prognoses. This study is to find the differential CT features of colorectal PD-NETs from WD-NETs and ADCs. MATERIALS AND METHODS: CT features of 25 colorectal WD-NETs, 36 PD-NETs, and 36 ADCs were retrospectively reviewed. Significant variables were assessed using univariate and multivariate analyses. Receiver operating characteristics analysis determined the optimal cut-off value of tumour and lymph node (LN) size. RESULTS: Large size, rectum location, ulceroinfiltrative morphology without intact overlying mucosa, heterogeneous attenuation with necrosis, presence of ≥3 enlarged LNs, and metastasis were significant variables to differentiate PD-NETs from WD-NETs (P < 0.05). High attenuation on arterial phase, persistently high enhancement pattern, presence of ≥6 enlarged LNs, large LN size, and wash-in/wash-out enhancement pattern of liver metastasis were significant variables to differentiate PD-NETs from ADCs (P < 0.05). CONCLUSIONS: Compared to WD-NETs, colorectal PD-NETs are usually large, heterogeneous, and ulceroinfiltrative mass without intact overlying mucosa involving enlarged LNs and metastasis. High attenuation on arterial phase, presence of enlarged LNs with larger size and greater number, and wash-in/wash-out enhancement pattern of liver metastasis can be useful CT discriminators of PD-NETs from ADCs. KEY POINTS: • Compared to WD-NETs, PD-NETs more frequently accompany enlarged LNs and metastases. • Metastatic LNs from PD-NETs are significantly larger than those from ADCs. • Hepatic metastases from PD-NETs usually show early enhancement and delayed washout. More... »
PAGES3867-3876
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DOIhttp://dx.doi.org/10.1007/s00330-017-4764-5
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PUBMEDhttps://www.ncbi.nlm.nih.gov/pubmed/28210802
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