Abstract #0551

The Role of Quantitative Imaging for Early Detection of Prostate Cancer Progression in Patients on Active Surveillance

Isabella M Kimbel¹, Veronica Wallaengen¹, Evangelia I. Zacharaki¹, Adrian L. Breto¹, Ahmad Algohary¹, Sandra M. Gaston¹, Oleksandr N. Kryvenko², Patricia Castillo³, Matthew C. Abramowitz¹, Alan Pollack¹, Sanoj Punnen⁴, and Radka Stoyanova¹

¹Radiation Oncology, University of Miami, Miami, FL, United States, ²Pathology, University of Miami, Miami, FL, United States, ³Radiology, University of Miami, Miami, FL, United States, ⁴Urology, University of Miami, Miami, FL, United States

Synopsis

Keywords: Prostate, Prostate

Motivation: Patients on Active Surveillance (AS) for prostate cancer have a high risk of cancer progression to treatment. There is a need for additional tools to risk stratify AS patients.

Goal(s): To evaluate the Habitat Risk Score (HRS) method for automatic identification of lesions for early detection of AS progressors in a prospective trial.

Approach: HRS was assessed in patients that progressed in the 1^st, 2^nd or 3^rd year of AS.

Results: In 40% of the patients, HRS identified a dominant lesion that was not targeted during biopsy. The study illustrates the quantitative power of HRS as compared to PIRADS.

Impact: Integrating Habitat Risk Score (HRS) in Active Surveillance for prostate cancer has the potential to significantly reduce the number of surveillance biopsies. HRS facilitates the detection of progression through assignment of robust biopsy targets and quantification of tumor habitat changes.

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