MRI-guided Transurethral Urethral Ultrasound Ablation for the Treatment of Low to Intermediate Grade Prostate Cancer

PRIMARY OBJECTIVE:

I. To perform the TULSA procedure for safety and efficacy outcomes in men aged 45 to 80 years with biopsy-confirmed, National Comprehensive Cancer Network (NCCN) low to intermediate-risk prostate cancer.

SECONDARY OBJECTIVE:

I. To assess patient-reported metrics for quality of life (QOL). II. To assess return to normal activity. III. Compare economic benefit as noted from Expanded Prostate Cancer Index Composite (EPIC) questionnaire.

OUTLINE:

Patients undergo MRI-guided TULSA. Patients may also undergo digital rectal exam (DRE), cystoscopy, biopsy, bone scan, prostate specific membrane antigen (PSMA) positron emission tomography (PET), and/or multiparametric MRI (mpMRI) at screening.

After completion of study treatment, patients are followed at 3, 6, 9, 12, 15, 18, 21 and 24 months.

Inclusion criteria

• Male
• Age 45-80 years, with > 10 years life expectancy
• Biopsy-confirmed, NCCN [Gleason Grade (GG) 1, favorable GG 2 and unfavorable GG3] intermediate-risk prostate cancer
• Stage =< T2c, N0, M0
• International Society of Urological Pathology (ISUP) grade group 1, 2, or 3 disease on transrectal ultrasonography (TRUS)-guided biopsy (minimum 8 cores, combination of systematic and MRI fusion-guided) or in-bore biopsy [minimum 3 cores from each Prostate Imaging-Reporting and Data System (PI-RADS) version (v)2 category >= 3 lesion]. Biopsy reported within 12 months of baseline visit, with minimum 6-week interval between biopsy and baseline
• Prostate specific antigen (PSA) =< 20 ng/mL reported within 3 months of baseline
• Treatment naive
• Planned ablation volume < 3.0 cm axial radius from the urethra on mpMRI acquired within 6 months of baseline

Exclusion criteria

• Inability to undergo MRI or general anaesthesia
• Suspected tumour > 30 mm from the prostatic urethra or < 14 mm from the prostatic urethra
• Prostate calcifications > 3 mm in maximum extent obstructing ablation of tumor on low-dose pelvic computed tomography (CT)

• Criteria subject to additional review and approval by sponsor. Alternatively, prospective TRUS to query calcifications or susceptibility-weighted MRI if available may be used to assess calcification. Imaging for calcification screening must be dated within 1 year of baseline visit
• Unresolved urinary tract infection or prostatitis
• History of proctitis, bladder stones, hematuria, history of acute urinary retention, severe neurogenic bladder
• Artificial urinary sphincter, penile implant or intraprostatic implant
• Less than 10 years life expectancy
• Patients who are otherwise not deemed candidates for radical prostatectomy (RP)
• Inability or unwillingness to provide informed consent
• History of anal or rectal fibrosis or stenosis, or urethral stenosis, or other abnormality challenging insertion of devices