Korean Journal of Radiology

The Korean Society of Radiology (대한영상의학회)
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Contrast-Enhanced Harmonic Ultrasonography for the Assessment of Prostate Cancer Aggressiveness: a Preliminary Study

  • Zhu, Yunkai (Department of Ultrasound in Medicine, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine) ;
  • Chen, Yaqing (Department of Ultrasound in Medicine, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine) ;
  • Jiang, Jun (Department of Ultrasound in Medicine, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine) ;
  • Wang, Ren (Department of Ultrasound in Medicine, Sixth People's Hospital Affiliated to Shanghai Jiaotong University) ;
  • Zhou, Yongchang (Department of Ultrasound in Medicine, Sixth People's Hospital Affiliated to Shanghai Jiaotong University) ;
  • Zhang, Huizhen (Department of Pathology, Sixth People's Hospital Affiliated to Shanghai Jiaotong University)
  • Received : 2009.06.07
  • Accepted : 2009.08.10
  • Published : 2010.02.01
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Abstract

Objective: To determine whether contrast-enhanced harmonic ultrasonography can be used to predict the aggressiveness of prostate cancer. Materials and Methods: Contrast-enhanced harmonic ultrasonography was performed in 103 patients suspected of prostate cancer before biopsy. Time intensity curves were reconstructed for systematic biopsy sites and sonographic abnormalities. The characteristics of the curves were described using hemodynamic indices including arrival time (AT), time-to-peak (TTP), and peak intensity (PI). The differences of hemodynamic indices between high-grade and low-grade cancer were analyzed and the correlations between the hemodynamic indices and biopsy Gleason score were studied. Results: Prostate cancer was detected in 41 of 103 patients and there were significant differences in the hemodynamic indices between the biopsy sites of the non-malignant patients and prostate cancer lesions (p < 0.05). The prostate biopsies revealed 154 prostate cancer lesions, including 31 low-grade lesions and 123 high-grade lesions. The hemodynamic indices AT and TTP of highgrade tumors were significantly shorter than those of low-grade tumors (p = 0.001, 0.002). In addition, high-grade peripheral zone (PZ) tumors had higher PI than low-grade PZ tumors (p = 0.009). The PZ prostate cancer Gleason score correlated with PI, AT and TTP, with Spearman correlation coefficients of 0.223, -0.335, and -0.351, respectively (p = 0.013, < 0.001 and < 0.001). Conclusion: Contrast-enhanced ultrasound measurements of hemodynamic indices correlate with the prostate cancer Gleason score.

Keywords

Acknowledgement

Supported by : Science and Technology Commission of Shanghai Municipality

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