Journal article
Prostate Cancer Aggressiveness: Assessment with Whole-Lesion Histogram Analysis of the Apparent Diffusion Coefficient
Radiology, Vol.271(1), pp.143-152
04/01/2014
DOI: 10.1148/radiol.13130973
PMID: 24475824
Abstract
To evaluate the relationship between prostate cancer aggressiveness and histogram-derived apparent diffusion coefficient (ADC) parameters obtained from whole-lesion assessment of diffusion-weighted magnetic resonance (MR) imaging of the prostate and to determine which ADC metric may help best differentiate low-grade from intermediate-or high-grade prostate cancer lesions.
The institutional review board approved this retrospective HIPAA-compliant study of 131 men (median age, 60 years) who underwent diffusion-weighted MR imaging before prostatectomy for prostate cancer. Clinically significant tumors (tumor volume > 0.5 mL) were identified at wholemount step-section histopathologic examination, and Gleason scores of the tumors were recorded. A volume of interest was drawn around each significant tumor on ADC maps. The mean, median, and 10th and 25th percentile ADCs were determined from the whole-lesion histogram and correlated with the Gleason score by using the Spearman correlation coefficient (rho). The ability of each parameter to help differentiate tumors with a Gleason score of 6 from those with a Gleason score of at least 7 was assessed by using the area under the receiver operating characteristic curve (A(z)).
In total, 116 clinically significant lesions (89 in the peripheral zone, 27 in the transition zone) were identified in 85 of the 131 patients (65%). Forty-six patients did not have a clinically significant lesion. For mean ADC, median ADC, 10th percentile ADC, and 25th percentile ADC, the Spearman r values for correlation with Gleason score were -0.31, -0.30, -0.36, and -0.35, respectively, whereas the A(z) values for differentiating lesions with a Gleason score of 6 from those with a Gleason score of at least 7 were 0.704, 0.692, 0.758, and 0.723, respectively. The A(z) of 10th percentile ADC was significantly higher than that of the mean ADC for all lesions and peripheral zone lesions (P = .0001).
When whole-lesion histograms were used to derive ADC parameters, 10th percentile ADC correlated with Gleason score better than did other ADC parameters, suggesting that 10th percentile ADC may prove to be optimal for differentiating low-grade from intermediate-or high-grade prostate cancer with diffusion-weighted MR imaging. (C) RSNA, 2013
Details
- Title: Subtitle
- Prostate Cancer Aggressiveness: Assessment with Whole-Lesion Histogram Analysis of the Apparent Diffusion Coefficient
- Creators
- Olivio F. Donati - Memorial Sloan Kettering Cancer CenterYousef Mazaheri - Memorial Sloan Kettering Cancer CenterAsim Afaq - Memorial Sloan Kettering Cancer CenterHebert A. Vargas - Memorial Sloan Kettering Cancer CenterJunting Zheng - Memorial Sloan Kettering Cancer CenterChaya S. Moskowitz - Memorial Sloan Kettering Cancer CenterHedvig Hricak - Memorial Sloan Kettering Cancer CenterOguz Akin - Memorial Sloan Kettering Cancer Center
- Resource Type
- Journal article
- Publication Details
- Radiology, Vol.271(1), pp.143-152
- Publisher
- Radiological Soc North America
- DOI
- 10.1148/radiol.13130973
- PMID
- 24475824
- ISSN
- 0033-8419
- eISSN
- 1527-1315
- Number of pages
- 10
- Grant note
- 16463 / Cancer Research UK
- Language
- English
- Date published
- 04/01/2014
- Academic Unit
- Radiology
- Record Identifier
- 9984318700102771
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