A Study to Evaluate the Safety, Tolerability and Efficacy of a Liproca® Depot Injection in Patients With Prostate Cancer

Patients assigned to Active Surveillance and who have fulfilled all inclusion criteria will receive a prophylactic antibiotic and a local anaesthetic (according to the Investigator's Standard of Care) prior to administration of Liproca® Depot. 60 subjects will be enrolled. The Single Dose Study will be conducted in two stages: In Stage I, 20 subjects will be randomized into two groups to receive one dose of Liproca® Depot equal to 35% (Cohort 1) or 45 % (Cohort 2) of their prostate volume (mL) (N=10:10). Two weeks after all subjects have received their initial dose, the Data Safety Monitoring Board (DSMB) will review the subjects' safety and tolerability data over the first 14 days after receiving treatment. In Stage II, 40 subjects will be randomized to receive either 16mL (Cohort 3) or 20mL (Cohort 4) of Liproca® Depot. All subjects in Stage I and Stage II will be followed for 24 weeks. Subjects who complete the Single Dose Study and who experience no safety or tolerability issues, as determined by the Investigator, may be offered an option to participate in the Open Label Extension Study (OLE). Subjects enrolled in the OLE will be observed for PSA recurrence every 8 weeks. If PSA recurrence is confirmed (defined as a PSA level exceeding at least 100 % of Baseline value) subjects will receive a second treatment of Liproca® Depot. The dose will be injected into the tumour focus/foci and in close proximity to the tumour, based on a prostate biopsy (and MRI, if applicable), using a TRUS for guidance. Stage I subjects who received 35% volume of Liproca® Depot will receive 16 mL and subjects who received 45% volume of Liproca® Depot will receive 20 mL. Stage II subjects will receive the same dose of Liproca® Depot that was administered in the first treatment. Subjects in the OLE receiving a second injection will be followed up for an additional 24 weeks for safety, tolerability and efficacy. After this period, subjects may undergo MRI imaging and a prostate biopsy.