Prospective Clinical Utility Study to Assess the Impact of Decipher on Treatment Decisions After Surgery

This prospectively decision impact study will evaluate physicians and patient treatment plan
choices before and after reviewing Decipher results for eligible patient cases. The clinical
utility of Decipher will be evaluated for patients meeting the inclusion criteria at two
time-points post-RP:

1. In the adjuvant setting: within 12 months after surgery (in the absence of detectable
PSA rise of BCR)

2. In the salvage setting: post-RP with evidence of PSA rise or BCR (defined as PSA
detectable and rising on 2 or more subsequent determinations)

A total of 150 patient cases, in each arm, will be prospectively selected from clinical
sites. The study as a whole will enroll 300 patient cases.

As a condition of participation in the study, each clinical site must agree to provide a
minimum of 10 patient cases.

Inclusion Criteria:

1. Pathological T3 stage of disease (i.e., EPE or SVI), or

2. Positive surgical margins, or

3. Detectable PSA, defined as PSA detectable and rising on 2 or more subsequent
determinations

Exclusion Criteria:

1. For adjuvant setting patients: Metastatic Disease (M+) prior to surgery

2. For salvage setting patients: Metastatic Disease at PSA rise

3. Failure of PSA to nadir after surgery

4. Received any neo-adjuvant prostate cancer treatment before radical prostatectomy

5. Received any adjuvant chemotherapy

6. Required patient clinical data is not available for evaluation of eligibility
criteria

7. For adjuvant setting patients, any treatment received after surgery

8. For salvage setting patients, lack of documented treatment or management
recommendation on file

9. Tissue specimen is inadequate for sampling and analysis