Neoplasms

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Genital Diseases, Male

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Bicalutamide

Finasteride

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Androgen Antagonists

Hormones

Hormone Antagonists

5-alpha Reductase Inhibitors

Enzyme Inhibitors

Radical therapy (radiotherapy or prostatectomy \[radiotherapy can be external beam or brachytherapy\]). In patients undergoing radiotherapy a maximum of 6-months neo-adjuvant hormonal therapy will be allowed. In patients undergoing radical prostatectomy, cytoreduction of maximum 6 months with medication will be permissible, provided this is part of local practice.

Focal therapy alone (high intensity focused ultrasound \[HIFU\] or cryotherapy as per physician and centre choice). A second focal therapy session in-field, or a first focal therapy session to an out-of-field progressive or de novo lesion will be allowed as part of the focal therapy intervention.

Focal therapy alone (high intensity focused ultrasound \[HIFU\] or cryotherapy as per physician and centre choice). A second treatment in-field, or a first focal ablation to an out-of-field progressive or de novo lesion will be allowed but will be regarded as failure events for the purpose of CHRONOS-B.

Neoadjuvant finasteride 5mg once daily for a minimum of 12 weeks followed by focal therapy (as per CHRONOS B control arm).

Neoadjuvant bicalutamide 50mg once daily therapy for a minimum of 12 weeks followed by focal therapy (as per control arm).

Radical therapy (radiotherapy or prostatectomy \[radiotherapy can be external beam or brachytherapy\]

Radical therapy (radiotherapy or prostatectomy [radiotherapy can be external beam or brachytherapy]

Focal therapy (high intensity focused ultrasound or cryotherapy)

Focal therapy

finasteride 5mg tablets 12 weeks prior to focal therapy

Focal therapy after Finasteride 5Mg tablets for 12 weeks

Bicalutamide 50mg per day - 12 weeks prior to focal therapy

Focal therapy after Bicalutamide 50Mg tablets for 12 weeks

Hashim Ahmed

Thiagarajah Sasikaran, PhD

Gordon Muir

Mr Winkler

Mathias Winkler

Naeem Soomro

Nimalan Arumainayagam

Richard Hindley

Sarbjinder Sandhu

Hashim U Ahmed, BM, BCh (Oxon), BA, PhD, FRCS

Vincent Khoo

Tim Dudderidge

Tim Dudderidge, FRCS (Urol)

Stuart McCracken

Stuart McCracken, FRCS (Urol)

Men diagnosed with significant cancer confined to the prostate currently undergo radical therapy directed to the whole prostate (radiotherapy or prostatectomy). These provide good cancer control but can cause significant side effects.

Focal Therapy involves targeting the cancer alone, whilst leaving healthy prostate gland alone. Case series have shown similar cancer control over 5 years with a much better side effect profile. However, there have been no randomised control trials (RCTs) comparing the success in cancer control and the quality of life in patients that undergo radical therapy vs those that undergo focal therapy. Further, there is a need to assess the use of additional therapies that may improve the cancer control outcomes following focal therapy. By having a trials platform with two RCTs (CHRONOS-A and CHRONOS-B) that reflect best patient and physician preferences/ equipoise, the investigators aim to answer these questions.

To improve acceptability, recruitment and compliance, the investigators have an embedded study aimed at reviewing clinician and patient perspectives and trial acceptability. CHRONOS-A will compare radical therapy to focal therapy, whilst CHRONOS-B will compare focal therapy alone to focal therapy with various therapies targeting the testosterone pathway that can shrink the cancer before it is treated. The investigators think this might improve outcomes further for men that definitely want focal therapy.

AIM:

CHRONOS-A

Pilot: To determine if men will agree to participate in a randomised controlled trial that randomly assigns them to focal therapy alone or radical therapy (radiotherapy or prostatectomy).

Main: To determine if focal therapy alone is non-inferior when compared to radical therapy (radiotherapy or surgery) in terms of progression-free survival at 5 years in men with clinically significant non-metastatic cancer.

CHRONOS-B

Pilot: To determine if men expressing a preference for focal therapy will agree to participate in a multi-arm, multi-stage Randomised Controlled Trial that randomly assigns them to focal therapy alone or focal therapy in combination with neoadjuvant and/or adjuvant agents.

Main: To determine if focal therapy combined with neoadjuvant and/or adjuvant agents, compared to focal therapy alone, will improve failure-free survival at 5 years, in men with clinically significant non-metastatic cancer.

OBJECTIVES To deliver a trials framework that fits with existing patient and physician equipoise so that the investigators can answer the next generation of research questions to evaluate medium-term outcomes following minimally invasive focal therapy in the treatment of clinically significant, non-metastatic prostate cancer.

Embedded internal pilot objectives:

* Determine patient acceptance to randomisation.
* Conduct an embedded qualitative study of patient and clinician acceptance and experience of the linked randomised controlled trial CHRONOS design.
* Establish the feasibility of an economic evaluation alongside the main trial.
* Determine acceptability and completeness of resource use and utility measures.
* Identify the relevant NHS and non-NHS resource use to be collected alongside the main trial.
* Identify the relevant items to populate the Cost and Consequences framework.
* Perform preliminary analysis of pattern of missing data.

MAIN STUDY PRIMARY OBJECTIVES

CHRONOS-A:

To evaluate progression-free survival rates of focal therapy alone compared to radical therapy (radiotherapy or surgery) in the treatment of non-metastatic clinically significant prostate cancer. Progression-free survival is defined as time from randomisation to salvage whole-gland or systemic therapy, prostate cancer metastases or prostate cancer-specific mortality.

CHRONOS-B:

To evaluate Failure-Free-Survival rates of focal therapy alone compared to focal therapy combined with other therapies as a neoadjuvant strategy. Failure-Free-Survival is defined as time from randomisation to further focal therapy session or salvage whole-gland or systemic therapy or prostate cancer metastases or prostate cancer-specific mortality.

MAIN STUDY SECONDARY OBJECTIVES

Disease control:

Determine the histological, biochemical and oncological disease control for men undergoing radical therapy, focal therapy or focal therapy with neo/adjuvant treatments.

Adverse events and Functional Outcomes:

Determine the adverse events and functional outcomes after radical therapy, focal therapy or focal therapy with neo/adjuvant treatments

Health economics:

* Establish the NHS costs of the different interventions.
* Determine the Cost per QALYs (CUA), cost per PFS/FFS (CEA) and cost and consequences (CCA).
* Determine acceptability and completeness of resource use and utility measures.

Qualitative:

* Patient experience of consent and recruitment, including reasons for declining participation.
* Participants' motivation to accept randomisation to and compliance with an intervention, which may or may not include neoadjuvant and adjuvant treatments.
* Patients' understanding and experience of each trial arm.
* Patients' experience of toxicities, focusing on erectile dysfunction and urinary symptoms.
* Patients' attitudes to the predicted survival rate.
* Potential improvements to recruitment processes.
* Healthcare professionals' attitudes to intervention arms and trial design and whether this might impact on recruitment.

Imaging and Histology:

* Compare MRI outcomes with histology at time-points in which both are mandated.

Biobank and databank objectives:

* Evaluate cancer infiltrating immune cells and immune gene signatures following ablation.
* Build a biobank and databank of matched imaging, blood, serum, plasma and pre-digital rectal examination urine as well as FFPE biopsy samples.

DURATION :

Pilot: Recruitment 12 months. Minimum 3 months follow-up. Main study: Recruitment further 48 months. Total including follow-up = 96 months

SAMPLE SIZE :

Pilot Study - CHRONOS-A \& B - 60 patients each over 12-months. Main study - CHRONOS-A - 1190 patients / CHRONOS-B - 1260 patients. PATIENT POPULATION: Men with non-metastatic prostate cancer who are suitable for focal therapy and radiotherapy.

PRIMARY ENDPOINTS (Main Stage) CHRONOS-A: Progression-Free survival (PFS) defined as biochemical failure (radical therapies only) or salvage therapy (local or systemic) or prostate cancer metastases or prostate cancer specific mortality.

CHRONOS-B: Failure-Free survival (FFS) defined as more than one focal therapy session or salvage therapy (local or systemic) or prostate cancer metastases or prostate cancer specific mortality.

SECONDARY ENDPOINTS (Main Stage)

Disease control:

* Rates of positive biopsy for any prostate cancer and significant cancer defined by a number of different thresholds on biopsy following focal therapy (treated and untreated side).
* Rates of second or third focal therapy sessions, in-field or out-of-field.
* Rates of radiotherapy as adjuvant or salvage therapy following surgery or focal therapy.
* Rates of prostatectomy as adjuvant or salvage therapy following radiotherapy or focal therapy.
* Rates of systemic therapy as adjuvant or salvage therapy following surgery, radiotherapy or focal therapy.
* Rates of prostate cancer-specific mortality.
* Rates of all-cause mortality.
* Long-term health outcomes of those participants consenting to longitudinal follow-up will be reported in subsequent studies pending further funding.

Adverse events and functional outcomes:

* Rates of cystoscopic interventions following treatment.
* Rates of implant insertion for treatment of incontinence and erectile dysfunction.
* Rates of medication and/or pump devices used for erectile dysfunction following treatment.
* Rates of endoscopic investigations of the lower bowel following treatment.
* Rates of pad-use and quantity per day for urinary incontinence following treatment.
* Rates of pad-use and quantity per day for faecal incontinence following treatment.
* Rates of adverse event rates and complications.
* Genito-urinary and rectal side-effects using patient-reported outcome measures using validated questionnaires including evaluation of return to baseline function for erectile and urinary function and various minimum decreases in PROMS scores.

Health economics:

* To establish the NHS costs of the different interventions.
* To determine the incremental cost per quality adjusted life year (QALYs)gained over the estimated lifetime of participants for focal therapy versus radical therapy.
* To determine the incremental cost per quality adjusted life year (QALYs) gained over the estimated lifetime of participants for focal therapy versus focal therapy with neoadjuvant and/or adjuvant strategies.

Qualitative:

* The impact on participants' overall health-related quality-of-life including adverse events and impact on genito-urinary and rectal functional status using validated patient reported outcome measures.
* Descriptive analyses of the questionnaire data, and use of questionnaire and qualitative interview datasets in a multi-methods analysis to look for overarching themes in barriers and facilitators to participation in CHRONOS-A and CHRONOS-B.

Imaging and Pathology

* Accuracy and variability of multi-parametric MRI (mpMRI) in detecting disease at baseline prior to focal therapy and absence or presence of recurrence of cancer based on histology outcomes on biopsy. Target definition for recurrence will be defined as significant prostate cancer as per inclusion criteria.

Translational, Biobank and Databank:

* Analysis on the localisation and nature of cancer-infiltrating immune cells and the immune-relevant gene expression within the cancer tissue.
* The creation of a biobank and databank of matched blood, serum, plasma and pre-digital rectal examination urine as well as imaging as well as FFPE biopsy samples.

Two linked Randomised Controlled Trials with CHRONOS-A and CHRONOS-B discussed with patients and choice of A or B dependent on physician and patient equipoise.

* CHRONOS-A Two arm RCT
* CHRONOS-B Multi-Arm Multi-Stage (MAMS) Randomised Control Trial

Comparative Health Research Outcomes of NOvel Surgery in Prostate Cancer

Imperial Prostate 4: Comparative Health Research Outcomes of NOvel Surgery in Prostate Cancer

To assess the acceptance of randomisation to the allocated arm within CHRONOS A \& CHRONOS B using rates of compliance, and rates of withdrawal

To estimate the recruitment rate to allocated arm within CHRONOS A \& CHRONOS B. The main study will be initiated if the minimum target recruitment rate of the Pilot is within the lower end of the confidence interval and funding has been confirmed.

To evaluate progression-free survival (PFS) rates of focal therapy alone compared to radical therapy (radiotherapy or surgery) in the treatment of non-metastatic clinically significant prostate cancer. PFS is defined as time from randomisation to salvage whole-gland or systemic therapy, prostate cancer metastases or prostate cancer-specific mortality.

To evaluate Failure-Free-Survival (FFS) rates of focal therapy alone compared to focal therapy combined with other therapies as a neoadjuvant strategy. FFS is defined as time from randomisation to further focal therapy session or salvage whole-gland or systemic therapy or prostate cancer metastases or prostate cancer-specific mortality.

Progression on PSA and imaging and impact of clinical features on progression, measured using PSA blood tests

To observe the frequency of adverse events as determined by Common Terminology Criteria for Adverse Events.

Health-related quality-of-life, measured using EuroQol (EQ-5D-5L) questionnaire, Score 0-100

Urinary side effects, measured using the IPSS questionnaire, Score 0-35

Urinary side effects, measured using the EPIC-Urinary domain questionnaire, Score 0-34

Sexual side effects, measured using the IIEF15 questionnaire, Score 0-75.

Effect on quality of life, measured using the EPIC - 26 questionnaire, Score 0-79

To observe the impact of participants' overall health-related quality- of- life as well as adverse events and impact on genito-urinary and rectal functional status using validated patient reported outcomes measures (International Index of Erectile Function-15, EPIC-26, EPIC Urinary domain, International Prostate Symptom Score and CTCAEv4.0 bowel domain). Further analysis to be performed using qualitative interview datasets in a multi-methods analysis.

To compare the predictive value of the PI-RADS and/or Likert scoring system against histological outcomes in patients treated with localised, clinically significant prostate cancer over at least 5 years.

Spots Global Cancer Trial Database for focal therapy after finasteride 5mg tablets for 12 weeks