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Clinical Trial Summary

The current study aims at evaluating the diagnostic performance of [18F]CTT1057 as a PET imaging agent for detection and localization of PSMA positivity in patients diagnosed of biochemical recurrence of prostate cancer (PCa), using a composite truth standard. Approximately 190 participants will be enrolled to ensure at least 152 participants to complete the [18F]CTT1057 PET/CT scan procedure (i.e. investigational imaging agent administration and successful completion of the PET/CT scan), which will be required for the calculation of the co-primary endpoints.


Clinical Trial Description

This is a prospective, open-label, multi center, single-arm Phase III study to evaluate the diagnostic performance of [18F]CTT1057 as a PET imaging agent for detection and localization of PSMA positive tumors in PCa patients diagnosed with biochemical recurrence (BCR) after radical prostatectomy or curative-intent radiotherapy, using a Composite Truth Standard (CTS) as reference. The CTS to be used as reference will be hierarchical in nature, with 3 levels of Standard of Truth (SoT) procedures, that will be applied as follows: CTS Level 1: Histopathology if available (from prospective biopsy or salvage surgery performed within 8 weeks after the [18F]CTT1057 PET/CT scan); OR in case that histopathology is not available, inconclusive or negative: CTS Level 2: Imaging diagnostic procedures performed on each patient as clinically indicated per SoC, which must include at least a high resolution CT scan with contrast and a [68Ga]Ga-PSMA-11 PET/CT) performed within 8 weeks (either before or after) the [18F]CTT1057 PET/CT scan. Three-month follow-up imaging (from baseline) will also be used as part of the CTS level 2 in cases where it is clinically required for the diagnosis of particular lesion(s); OR if neither of the two above are feasible or deemed appropriate: CTS Level 3: 50% or greater decline in PSA following radiation therapy (as long as no concomitant androgen deprivation therapy (ADT) is given) as per Prostate Cancer Working Group 3 (PCWG3) criteria. All participants will undergo 2 PET/CT scans: one with the investigational agent [18F]CTT1057 and another with [68Ga]Ga-PSMA-11 (as a component of the CTS Level 2 and for a secondary endpoint of assessment of concordance between the 2 PET/CT scans for detection of lesions at patient level). The 2 PET imaging procedures will be performed at least 14 days apart, and the PET/CT scan sequence for each participant will be assigned at random in a 1:1 ratio. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT04838613
Study type Interventional
Source Novartis
Contact Novartis Pharmaceuticals
Phone 1-888-669-6682
Email [email protected]
Status Not yet recruiting
Phase Phase 3
Start date September 30, 2021
Completion date June 9, 2023

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