Dynamic contrast-enhanced MRI of benign prostatic hyperplasia and prostatic carcinoma: correlation with angiogenesis

Ren, J.; Huan, Y.; Wang, H.; Chang, Y.-J.; Zhao, H.-T.; Ge, Y.-L.; Liu, Y.; Yang, Y.

doi:10.1016/j.crad.2007.07.023

« Previous Next »Clinical Radiology
Volume 63, Issue 2 , Pages 153-159, February 2008

Dynamic contrast-enhanced MRI of benign prostatic hyperplasia and prostatic carcinoma: correlation with angiogenesis

J. Ren
- Department of Radiology, Xijing Hospital, Fourth Military Medical University, Xi'an, People's Republic of China
Y. Huan
- Department of Radiology, Xijing Hospital, Fourth Military Medical University, Xi'an, People's Republic of China
- Guarantor and correspondent: Y. Huan, Department of Radiology, Xijing Hospital, Fourth Military Medical University, Chang Le Western Road No. 15, Xi'an 710032, People's Republic of China. Tel./fax: +86 29 84775421.
H. Wang
- Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, People's Republic of China
Y.-J. Chang
- Department of Radiology, Xijing Hospital, Fourth Military Medical University, Xi'an, People's Republic of China
H.-T. Zhao
- Department of Radiology, Xijing Hospital, Fourth Military Medical University, Xi'an, People's Republic of China
Y.-L. Ge
- Department of Radiology, Xijing Hospital, Fourth Military Medical University, Xi'an, People's Republic of China
Y. Liu
- Department of Radiology, Xijing Hospital, Fourth Military Medical University, Xi'an, People's Republic of China
Y. Yang
- Department of Radiology, Xijing Hospital, Fourth Military Medical University, Xi'an, People's Republic of China

Received 16 November 2006; received in revised form 19 July 2007; accepted 25 July 2007.

Aim

To investigate the diagnostic and differential diagnostic values of dynamic contrast-enhanced magnetic resonance imaging (DCE MRI) in prostatic diseases, and to investigate the correlation between the parameters of SI–T curves and angiogenesis.

Materials and methods

Twenty-one patients with proven prostatic carcinoma (Pca) and 29 patients with proven benign prostatic hyperplasia (BPH) were examined using DCE MRI. Diagnostic characteristics for differentiation were examined using threshold values for maximum peak time, enhancement degree, and enhancement rate. Then, the signal intensity–time curves (SI–T curves) were analysed, and the correlations between the parameters of SI–T curves and the expression levels of vascular endothelial growth factor (VEGF) and microvascular density (MVD) were investigated. All patents underwent prostatectomy. DCE MRI and histological findings were correlated.

Results

Pca showed stronger enhancement with an earlier peak time, higher enhancement, and enhancement rate (p<0.05). Regarding the type of SI–T curves, in the BPH group six were type A, 10 were type B, and 13 were type C, whereas in the Pca group, 14 were type A, six were type B, and only one was type C (Chi-square test, χ²=13.57, P<0.005). The VEGF and MVD expression levels of Pca were higher than those of BPH. Peak time was negatively correlated with the expression levels of VEGF and MVD, whereas the enhancement degree and enhancement rate showed positive correlations (Pearson correlation, p<0.05).

Conclusion

Based on T2-weighted imaging, DCE MRI curves can help to differentiate benign from malignant prostate tissue. In the present study the type C curve was rarely seen with malignant disease, but these results need confirmation.