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Abstract #0965

EVALUATION OF DIFFUSION-WEIGHTED IMAGING AS A PROGNOSTIC BIOMARKER IN CASTRATION RESISTANT PROSTATE CANCER WITH BONE METASTASES

Raquel Perez-Lopez 1,2 , Matthew D. Blacklegde 1 , David Lorente 1,2 , Ulrike Naumann 1 , Joaquin Mateo 1,2 , Thian Yiliang 2 , Zaki Ahmad 2 , David J. Collins 1 , Martin O. Leach 1 , Gerhardt Attard 1,2 , Johann S. de Bono 1,2 , Dow-Mu Koh 1,2 , and Nina Tunariu 1,2

1 The Institute of Cancer Research, Sutton, Surrey, United Kingdom, 2 The Royal Marsden NHS Trust, Sutton, Surrey, United Kingdom

We conducted a study in patients with metastatic castration-resistant prostate cancer (mCRPC) and bone metastases, to evaluate if parameters derived from DWI (volume of bone disease and ADC values distribution in the bone metastases) confer prognostic information for overall survival. Whole body DW-MRI from 33 patients with mCRPC and bone involvement were analyzed and data were correlated with clinical variables. Our results show that the volume of bone disease assessed by DWI, and more so the volume of disease with ADC values between 750-1450 μm2/s, are a strong prognostic biomarker for overall survival in mCRPC and correlate with clinically relevant variables.

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