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CTT1057

Phase 3

Prostatic Neoplasms | Small molecule | Oncology |Novartis AG|Trials Updated: Oct 20, 2025

CTT1057 target and mechanism

ModalitySmall molecule

Also known as [18F]CTT1057

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLEDBiomarker
Total Trials2
Total Enrollment385

FDA Designations

No designations recorded

CTT1057 clinical trials

CTT1057 · 2 trials · 3 indications

Phase 3 1Phase 2 1
NCT04838613Study of Diagnostic Performance of [18F]CTT1057 in BCRProstatic Neoplasms
COMPLETED190 Analytics
PHASE3COMPLETED
Study of Diagnostic Performance of [18F]CTT1057 in BCR
Prostatic NeoplasmsUnlock trial analytics

Study Endpoints

Primary Endpoints

Region-level Correct Localization Rate (CLR) of Vidoflufolastat (18F)
vidoflufolastat (18F) PET imaging acquired at Day 1 or Day 15 assessed against Composite Truth Standard (CTS) obtained within 8 weeks (before or after) of 18F-CTT PET scan or during follow-up (up to 90 days after radiotherapy for PSA level assessment)

Region-level correct localization rate (CLR) is defined as the percentage of regions containing at least one True Positive (TP) lesion (exactly localized correspondence between PET imaging and the reference standard), regardless of any co-existent False Positive (FP) findings within the same region, out of all regions containing at least one PET-positive finding.

Patient-level Positive Predictive Value (PPV) (With Anatomical Localization) of Vidoflufolastat (18F)
vidoflufolastat (18F) PET imaging acquired at Day 1 or Day 15 assessed against Composite Truth Standard (CTS) obtained within 8 weeks (before or after) of 18F-CTT PET scan or during follow-up (up to 90 days after radiotherapy for PSA level assessment)

Patient-level positive predictive value (PPV) is defined as the percentage of participants who have at least one True Positive (TP) lesion (exactly localized correspondence between PET imaging and the reference standard), regardless of any co-existent False Positive (FP) findings, out of all participants who are PET/CT scan positive.

Patient-level Sensitivity of Vidoflufolastat (18F) - % Sensitivity
vidoflufolastat (18F)7 PET imaging acquired at Day 1 assessed against histopathology as Standard of Truth (SoT) obtained during surgery within 6 weeks from vidoflufolastat (18F) scan

Sensitivity of vidoflufolastat (18F) Positron Emission Tomography (PET) imaging, considering Prostate Specific Membrane Antigen (PSMA) positive patients as those who show at least one pathological vidoflufolastat (18F) uptake either in the primary tumor and/or metastatic Pelvic Lymph Node (PLN) regions, with anatomically localized correspondence with the Standard of Truth (SoT).

Region-level Specificity of Vidoflufolastat (18F) - % Specificity
vidoflufolastat (18F) PET imaging acquired at Day 1 assessed against histopathology as Standard of Truth (SoT) obtained during surgery within 6 weeks from vidoflufolastat (18F) scan

Specificity of vidoflufolastat (18F) PET imaging, defined as proportion of PLN regions that test negative for lymph nodes on vidoflufolastat (18F) among those that are lymph node negative on the SoT.

Secondary Endpoints

Patient-level Sensitivity of Vidoflufolastat (18F)
vidoflufolastat (18F) PET imaging acquired at Day 1 or Day 15 assessed against Composite Truth Standard (CTS) obtained within 8 weeks (before or after) of 18F-CTT PET scan or during follow-up (up to 90 days after radiotherapy for PSA level assessment)
Patient-level Specificity of Vidoflufolastat (18F)
vidoflufolastat (18F) PET imaging acquired at Day 1 or Day 15 assessed against Composite Truth Standard (CTS) obtained within 8 weeks (before or after) of 18F-CTT PET scan or during follow-up (up to 90 days after radiotherapy for PSA level assessment)
Patient-level Negative Predictive Value (NPV) of Vidoflufolastat (18F)
vidoflufolastat (18F) PET imaging acquired at Day 1 or Day 15 assessed against Composite Truth Standard (CTS) obtained within 8 weeks (before or after) of 18F-CTT PET scan or during follow-up (up to 90 days after radiotherapy for PSA level assessment)
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSEQUENTIAL
PurposeDIAGNOSTIC

Treatment Arms

ArmTypeDescription
PET/CT imaging with [18F]CTT1057 followed by [68Ga]Ga-PSMA-11 or vice versaEXPERIMENTALAll eligible participants were assigned to one of the following two PET/CT scan sequences at random in a 1:1 ratio: * Sequence 1: \[18F\]CTT1057 on Day 1 (investigational imaging agent of interest) followed by \[68Ga\]Ga-PSMA-11 at least 14 days apart (as part of CTS if required, and for secondary endpoint) * Sequence 2: \[68Ga\]Ga-PSMA-11 (as part of CTS if required, and for secondary endpoint) on Day 1 followed by \[18F\]CTT1057 (investigational imaging agent of interest) at least 14 days apart
PET/CT imaging with [18F]CTT1057EXPERIMENTALAll eligible participants will be enrolled to receive \[18F\]CTT1057 imaging agent on Day 1 and have PET/CT scan

Interventions

NameTypeDescription
[18F]CTT1057DRUGSingle intravenous dose of approximately 370 Mega-Becquerel (MBq) and subsequent PET/CT scan
[68Ga]Ga-PSMA-11DRUGSingle intravenous dose of approximately 150 MBq and subsequent PET/CT scan
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Eligibility Criteria

Age Range18 Years to 100 Years
SexMALE
Healthy VolunteersNo
Study Sites13

Inclusion Criteria * Signed informed consent must be obtained prior to participation in the study * Biopsy proven prostate adenocarcinoma. * Biochemical recurrence following initial definitive therapy (with either RP or curative intent radiation therapy) as defined: by AUA criteria (Cookson et al ...

Countries:United StatesFranceSpainSwitzerlandItaly
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Frequently asked questions about CTT1057

What is CTT1057 used for?

CTT1057 is an imaging agent being developed for use in prostate cancer, also called prostatic neoplasms. It is studied as a diagnostic tool for detecting PSMA-positive tumors and for evaluating biochemical recurrence of prostate cancer. It is not a therapeutic treatment; it is intended to help visualize prostate cancer lesions during diagnostic imaging.

Who is developing CTT1057?

CTT1057 is being developed by Novartis AG, which trades under the ticker NVS. Novartis is the sponsor of the clinical trials evaluating this imaging agent in prostate cancer.

What phase is CTT1057 in?

CTT1057 has been evaluated in Phase 2 and Phase 3 clinical trials. Two trials have been completed, and there are currently no active trials listed for this agent. It is an investigational imaging agent and has not been approved by the FDA.

What clinical trials is CTT1057 in?

CTT1057 has been studied in two completed clinical trials: NCT04838626, a Phase 2 study of diagnostic performance for PSMA-positive tumor detection, and NCT04838613, a Phase 3 study of diagnostic performance in biochemical recurrence. Both trials enrolled adult male participants with prostate cancer across sites in the United States and Europe.

Is CTT1057 the same as [18F]CTT1057?

Yes, CTT1057 is also known as [18F]CTT1057. The bracketed notation indicates the radiolabeled form of the compound used in positron emission tomography (PET) imaging. Both names refer to the same imaging agent being developed by Novartis.