|Table of Contents|

Comparative analysis of MRI signs of different grade pNEN and diagnostic value of "the bypass sign of main pancreatic duct"

Journal Of Modern Oncology[ISSN:1672-4992/CN:61-1415/R]

Issue:
2020 02
Page:
305-310
Research Field:
Publishing date:

Info

Title:
Comparative analysis of MRI signs of different grade pNEN and diagnostic value of "the bypass sign of main pancreatic duct"
Author(s):
Tian Xuwei; Ma Ailin; Ekbair·Tuluhong; Wang Luma; Abdulkiyom·Abduliz; Dai Guochao
The First People's Hospital of Kashi District，Xinjiang Kashi 844000,China.
Keywords:
pancreas; neuroendocrine tumor; pancreatic cancer; magnetic resonance imaging; differential diagnosis
PACS:
R735.9
DOI:
10.3969/j.issn.1672-4992.2020.02.029
Abstract:
Objective:To compare and analyze the MRI features of grade G1 and G2 pNEN，and to explore the diagnostic value of the bypass sign of main pancreatic duct.Methods:The clinical data of 32 patients with pNEN were retrospectively analyzed，and the difference of clinical indicators between G1 and G2 was quantitatively analyzed.Results: Among the 32 patients，there were 12 cases in G1，16 cases in G2 and 4 cases in G3，and the main sites were tail of pancreas，head of pancreas and neck of pancreas.Compared with G1 grade，G2 grade tumors had significantly larger diameter，more irregular shape lesions，blurred margins and obvious malignant tendency in biological behavior.The level of MRI plain scan signal homogenization of G1 NET was higher than that of G2（P＜0.05)，but there was no significant difference in signal intensity between the two phases of the enhanced MRI scan（P>0.05).Among 28 patients with NET，22（78.6%) had the "the bypass sign of the main pancreatic duct",and none of the NEC patients had this sign.Before operation，the accurate diagnostic rate of NET in 28 cases was 78.6%（22/28)，and 6 cases were misdiagnosed."The bypass sign of main pancreatic duct" was included on the basis of the original MRI diagnosis.The accurate diagnosis rate was increased to 89.3%（25/28)，but there were still 3 cases of misdiagnosis.Conclusion:MRI has a high accuracy in the differential diagnosis of benign and malignant pNEN，but there is a certain rate of misdiagnosis for partial G1 and G2 NET.The main duct bypass sign can help to reduce the misdiagnosis of pancreatic cancer.

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Last Update: 2019-11-29