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Article

Lipid-poor renal angiomyolipoma: Differentiation from clear cell renal cell carcinoma using wash-in and washout characteristics on contrast-enhanced computed tomography

  • Authors:
    • Pingkun Xie
    • Zhihui Yang
    • Zheng Yuan
  • View Affiliations / Copyright

    Affiliations: Department of Radiology, Ningbo Beilun People's Hospital, Ningbo, Zhejiang 315800, P.R. China, Department of Pathology, 81st Hospital of the People's Liberation Army (PLA), Nanjing, Jiangsu 210000, P.R. China, Department of Radiology, Shanghai PLA No. 85 Hospital, Shanghai 200052, P.R. China
  • Pages: 2327-2331
    |
    Published online on: February 9, 2016
       https://doi.org/10.3892/ol.2016.4214
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Abstract

In the present study, a total of 82 patients (42 men and 40 women; age range, 24‑84 years), including 34 patients with lipid‑poor renal angiomyolipoma (AML) and 49 with clear cell renal cell carcinoma (RCC), who had undergone multiphase contrast‑enhanced computed tomography (CT) (i.e., CT with unenhanced, corticomedullary, nephrographic and 5‑min delay phase scanning) were evaluated. The peak enhancement attenuation value, net enhancement attenuation value, enhancement ratio, washout value and washout ratio were calculated to compare the enhancement characteristics between the two diseases. The results revealed that the lipid‑poor AMLs had a significantly higher mean attenuation value compared with that of CCRCCs on unenhanced CT scans (37.8 vs. 30.9 HU; Mann‑Whitney U test, P=0.003). In addition, significant differences were found between lipid‑poor AMLs and CCRCCs with regard to wash‑in (Mann‑Whitney U test, P=0.001) and enhancement ratios (Mann‑Whitney U test, P=0.010) on contrast‑enhanced CT scans. A receiver operating characteristic (ROC) analysis revealed an area under the curve (AUC) of 0.722 using wash‑in for differentiation between CCRCCs and lipid‑poor AMLs. Lipid‑poor AMLs exhibited a reduced washout of contrast enhancement (35.8±32.7 HU washout value; 29.4±0.187% washout ratio) compared with that of CCRCCs (48.3±28.4 HU washout value; 35.7±0.148% washout ratio; Mann‑Whitney U test, P=0.037 and P=0.204, respectively). The ROC analysis result yielded an AUC of 0.639 for the use of washout to differentiate CCRCCs from lipid‑poor AMLs. In summary, a larger wash‑in and washout of contrast enhancement is a predictor that a lesion is CCRCC.
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Copy and paste a formatted citation
Spandidos Publications style
Xie P, Yang Z and Yuan Z: Lipid-poor renal angiomyolipoma: Differentiation from clear cell renal cell carcinoma using wash-in and washout characteristics on contrast-enhanced computed tomography. Oncol Lett 11: 2327-2331, 2016.
APA
Xie, P., Yang, Z., & Yuan, Z. (2016). Lipid-poor renal angiomyolipoma: Differentiation from clear cell renal cell carcinoma using wash-in and washout characteristics on contrast-enhanced computed tomography. Oncology Letters, 11, 2327-2331. https://doi.org/10.3892/ol.2016.4214
MLA
Xie, P., Yang, Z., Yuan, Z."Lipid-poor renal angiomyolipoma: Differentiation from clear cell renal cell carcinoma using wash-in and washout characteristics on contrast-enhanced computed tomography". Oncology Letters 11.3 (2016): 2327-2331.
Chicago
Xie, P., Yang, Z., Yuan, Z."Lipid-poor renal angiomyolipoma: Differentiation from clear cell renal cell carcinoma using wash-in and washout characteristics on contrast-enhanced computed tomography". Oncology Letters 11, no. 3 (2016): 2327-2331. https://doi.org/10.3892/ol.2016.4214
Copy and paste a formatted citation
x
Spandidos Publications style
Xie P, Yang Z and Yuan Z: Lipid-poor renal angiomyolipoma: Differentiation from clear cell renal cell carcinoma using wash-in and washout characteristics on contrast-enhanced computed tomography. Oncol Lett 11: 2327-2331, 2016.
APA
Xie, P., Yang, Z., & Yuan, Z. (2016). Lipid-poor renal angiomyolipoma: Differentiation from clear cell renal cell carcinoma using wash-in and washout characteristics on contrast-enhanced computed tomography. Oncology Letters, 11, 2327-2331. https://doi.org/10.3892/ol.2016.4214
MLA
Xie, P., Yang, Z., Yuan, Z."Lipid-poor renal angiomyolipoma: Differentiation from clear cell renal cell carcinoma using wash-in and washout characteristics on contrast-enhanced computed tomography". Oncology Letters 11.3 (2016): 2327-2331.
Chicago
Xie, P., Yang, Z., Yuan, Z."Lipid-poor renal angiomyolipoma: Differentiation from clear cell renal cell carcinoma using wash-in and washout characteristics on contrast-enhanced computed tomography". Oncology Letters 11, no. 3 (2016): 2327-2331. https://doi.org/10.3892/ol.2016.4214
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