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Homogenously isoattenuating insulinoma on biphasic contrast‑enhanced computed tomography: Little benefits of diffusion‑weighted imaging for lesion detection

  • Authors:
    • Zhenshan Shi
    • Xiumei Li
    • Ruixiong You
    • Yueming Li
    • Xianying Zheng
    • Kamisha Ramen
    • Vikash Sahadeo Loosa
    • Dairong Cao
    • Qunlin Chen
  • View Affiliations / Copyright

    Affiliations: Department of Radiology, First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian 350005, P.R. China, Department of Radiology, Fujian Medical University, Fuzhou, Fujian 350001, P.R. China
    Copyright: © Shi et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 3117-3125
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    Published online on: June 28, 2018
       https://doi.org/10.3892/ol.2018.9037
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Abstract

The aim of the present study was to evaluate the diagnostic benefit of diffusion‑weighted imaging (DWI) in the detection of homogenous isoattenuating insulinoma on biphasic contrast‑enhanced computed tomography (CT) preoperatively and to determine which magnetic resonance (MR) sequences exhibited the best diagnostic performance. A total of 44 consecutive patients who underwent biphasic contrast‑enhanced CT and conventional MR imaging (MRI), including DWI on a 3T scanner, were identified retrospectively. Apparent diffusion coefficient (ADC) values of insulinomas and the surrounding pancreatic parenchyma were compared using a Wilcoxon signed‑rank test. Receiver operating characteristic analysis was used to compare the diagnostic accuracy of four randomized image sets [T2‑weighted image (WI), axial T1WI, DWI and T2WI + DWI] for each reader. Axial T1‑weighted MRI exhibited the highest relative sensitivity for each reader; DWI alone exhibited the lowest relative sensitivity and the lower inter‑reader agreement. There was no significant difference in lesion detection between T2WI and T2WI + DWI image sets for each reader. The ADC values of the insulinoma were significantly lower compared with those of the surrounding parenchyma. In conclusion, DWI does not benefit the detection of homogenous isoattenuating insulinoma. Axial T1WI is the optimal pulse sequence. Quantitative assessment of the tumor ADC values may be a useful tool to characterize identified pancreatic neoplasms.
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Copy and paste a formatted citation
Spandidos Publications style
Shi Z, Li X, You R, Li Y, Zheng X, Ramen K, Loosa VS, Cao D and Chen Q: Homogenously isoattenuating insulinoma on biphasic contrast‑enhanced computed tomography: Little benefits of diffusion‑weighted imaging for lesion detection. Oncol Lett 16: 3117-3125, 2018.
APA
Shi, Z., Li, X., You, R., Li, Y., Zheng, X., Ramen, K. ... Chen, Q. (2018). Homogenously isoattenuating insulinoma on biphasic contrast‑enhanced computed tomography: Little benefits of diffusion‑weighted imaging for lesion detection. Oncology Letters, 16, 3117-3125. https://doi.org/10.3892/ol.2018.9037
MLA
Shi, Z., Li, X., You, R., Li, Y., Zheng, X., Ramen, K., Loosa, V. S., Cao, D., Chen, Q."Homogenously isoattenuating insulinoma on biphasic contrast‑enhanced computed tomography: Little benefits of diffusion‑weighted imaging for lesion detection". Oncology Letters 16.3 (2018): 3117-3125.
Chicago
Shi, Z., Li, X., You, R., Li, Y., Zheng, X., Ramen, K., Loosa, V. S., Cao, D., Chen, Q."Homogenously isoattenuating insulinoma on biphasic contrast‑enhanced computed tomography: Little benefits of diffusion‑weighted imaging for lesion detection". Oncology Letters 16, no. 3 (2018): 3117-3125. https://doi.org/10.3892/ol.2018.9037
Copy and paste a formatted citation
x
Spandidos Publications style
Shi Z, Li X, You R, Li Y, Zheng X, Ramen K, Loosa VS, Cao D and Chen Q: Homogenously isoattenuating insulinoma on biphasic contrast‑enhanced computed tomography: Little benefits of diffusion‑weighted imaging for lesion detection. Oncol Lett 16: 3117-3125, 2018.
APA
Shi, Z., Li, X., You, R., Li, Y., Zheng, X., Ramen, K. ... Chen, Q. (2018). Homogenously isoattenuating insulinoma on biphasic contrast‑enhanced computed tomography: Little benefits of diffusion‑weighted imaging for lesion detection. Oncology Letters, 16, 3117-3125. https://doi.org/10.3892/ol.2018.9037
MLA
Shi, Z., Li, X., You, R., Li, Y., Zheng, X., Ramen, K., Loosa, V. S., Cao, D., Chen, Q."Homogenously isoattenuating insulinoma on biphasic contrast‑enhanced computed tomography: Little benefits of diffusion‑weighted imaging for lesion detection". Oncology Letters 16.3 (2018): 3117-3125.
Chicago
Shi, Z., Li, X., You, R., Li, Y., Zheng, X., Ramen, K., Loosa, V. S., Cao, D., Chen, Q."Homogenously isoattenuating insulinoma on biphasic contrast‑enhanced computed tomography: Little benefits of diffusion‑weighted imaging for lesion detection". Oncology Letters 16, no. 3 (2018): 3117-3125. https://doi.org/10.3892/ol.2018.9037
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