Correlation between dynamic contrast-enhanced MRI and quantitative histopathologic microvascular parameters in organ-confined prostate cancer
- 629 Downloads
To correlate pharmacokinetic parameters of 3-T dynamic contrast-enhanced (DCE-)MRI with histopathologic microvascular and lymphatic parameters in organ-confined prostate cancer.
In 18 patients with unilateral peripheral zone (pT2a) tumours who underwent DCE-MRI prior to radical prostatectomy (RP), the following pharmacokinetic parameters were assessed: permeability surface area volume transfer constant (K trans), extravascular extracellular volume (Ve) and rate constant (K ep). In the RP sections blood and lymph vessels were visualised immunohistochemically and automatically examined and analysed. Parameters assessed included microvessel density (MVD), area (MVA) and perimeter (MVP) as well as lymph vessel density (LVD), area (LVA) and perimeter (LVP).
A negative correlation was found between age and K trans and K ep for tumour (r = −0.60, p = 0.009; r = −0.67, p = 0.002) and normal (r = −0.54, p = 0.021; r = −0.46, p = 0.055) tissue. No correlation existed between absolute values of microvascular parameters from histopathology and DCE-MRI. In contrast, the ratio between tumour and normal tissue (correcting for individual microvascularity variations) significantly correlated between K ep and MVD (r = 0.61, p = 0.007) and MVP (r = 0.54, p = 0.022). The lymphovascular parameters showed only a correlation between LVA and K ep (r = −0.66, p = 0.003).
Significant correlations between DCE-MRI and histopathologic parameters were found when correcting for interpatient variations in microvascularity.
• Normal prostate tissue shows strong heterogeneity in microvascularity.
• Peripheral zone prostate cancer shows increased and less heterogeneous microvascularity.
• Normal and tumour tissue shows considerable variation in microvascularity between patients.
• DCE-MRI should take into account the interprostatic heterogeneity of microvasculature between patients.
KeywordsProstate cancer Magnetic resonance imaging Microvessel density Lymphatic density Pharmacokinetics
Abbreviations and acronyms
dynamic contrast-enhanced magnetic resonance imaging
haematoxylin and eosin
permeability surface area volume transfer constant
lymph vessel area
lymph vessel density
lymph vessel perimeter
extravascular extracellular volume
The scientific guarantor of this publication is Christina Hulsbergen-van de Kaa. The authors of this manuscript declare no relationships with any companies whose products or services may be related to the subject matter of the article. This study has received funding from the Dutch Cancer Foundation (KWF), contract grant number KUN 2003 2529. One of the authors, Jeroen van der Laak, has significant statistical expertise. Institutional review board approval was not required because no experimental design involved animals or humans. Written informed consent was waived by the institutional review board. Some study subjects or cohorts have been previously reported by van Niekerk CG et al. (Prostate 71:91–97, 2011).
Methodology: retrospective, observational, performed at one institution.
- 11.Yakar D, Hambrock T, Huisman H et al (2010) Feasibility of 3 T dynamic contrast-enhanced magnetic resonance-guided biopsy in localizing local recurrence of prostate cancer after external beam radiation therapy. Invest Radiol 45:121–125Google Scholar