Abstract #4384

3T Multiparametric MRI based detection of Prostate Cancer: features of detected and missed tumors base on PIRADS v2 in 429 patients- using whole mount histopathology reference

Amirhossein Mohammadian Bajgiran¹, Sohrab Afshari Mirak¹, Ely Felker¹, Preeti Ahuja², Cleo Maehara², William Hsu², David Lu¹, Robert Reiter³, Anthony Sisk⁴, and Steve Raman¹

¹Abdominal Radiology, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States, ²Radiology Sciences, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States, ³Urology Department, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States, ⁴Pathology Department, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States

We evaluated the performance of the 3 Tesla multiparametric MRI (mp-MRI) for detection of prostate cancer (PCa) based on Prostate Imaging Reporting and Data System (PI-RADS) Version 2 in 429 patients with 874 lesions. The overall and index tumor detection rate of 3T mp-MRI was 49.3% and 77.9% respectively. The tumor detection rate based on PIRADS v2 increased by size, grade, stage, solitariness and smaller prostate volume. Most missed lesions were small and low grade although a small proportion of large and high grade lesions were not detected.

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