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Nirogacestat

Phase 3

Desmoid Tumor | Small molecule | Oncology |SpringWorks Therapeutics, Inc.|Last Updated: May 8, 2026

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
RandomizedDouble-BlindPLACEBO_CONTROLLEDDMCBiomarker
Total Trials3
Total Enrollment190
FDA Designations
No designations recorded
Clinical Trials (3)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT03785964Nirogacestat for Adults With Desmoid Tumor/Aggressive Fibromatosis (DT/AF)PHASE3 COMPLETED 142Apr 17, 2019Oct 17, 2024Jan 31, 202552 United States, Belgium +5
NCT07170644A Study of Nirogacestat in Japanese Adults With Desmoid Tumors/Aggressive Fibromatosis (DT/AF)PHASE2 ACTIVE NOT_RECRUITING 20Aug 8, 2025Oct 31, 2029May 8, 20263 Japan
NCT05949099Study of Cryoablation and Nirogacestat for Desmoid TumorPHASE2 RECRUITING 28Aug 15, 2023Feb 1, 2028Sep 8, 20251 United States
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Study Endpoints
Primary Endpoints
Progression Free Survival (PFS) Defined as the Time From Randomization Until Date of Assessment of Progression or Death by Any Cause.
On the first day of every 3 cycles (each cycle is 28 days) until disease progression is observed or death, whichever comes first, assessed up to approximately 2 years

Progression will be determined radiographically using RECIST v1.1 (Eisenhauer, 2009) or clinically as assessed by the investigator. Clinical progression is defined as the onset or worsening of symptoms resulting in a global deterioration of health status causing the permanent discontinuation from study treatment and the initiation of emergent treatment (e.g., radiotherapy, surgery, or systemic therapy including chemotherapy or tyrosine kinase inhibitors) for DT/AF. Events of clinical progression will be adjudicated by an independent blinded central Endpoint Adjudication Committee (EAC) which will qualify events of clinical progression for inclusion in the PFS endpoint prior to study unblinding according to an EAC Review Charter.

Objective response rate (ORR)
On the first day of every 3 cycles (each cycle is 28 days) until disease progression is observed or death, assessed up to approximately 3 years.

Objective response rate (ORR), defined as the proportion of participants with confirmed complete response (CR) + partial response (PR) assessed by independent Central Imaging Review using RECIST v1.1 (Eisenhauer 2009).

Clinical Benefit per RECIST v1.1
1 year

Clinical benefit (CB) is defined as the number of participants assessed with a complete response (CR), partial response (PR), or stable disease (SD) within 1 year and with no evidence of loss of response nor progression within that year. Response \& progression will be assessed according to the Revised Response Evaluation Criteria in Solid Tumors (RECIST)v1.1, as follows: RECIST v1.1: * CR=Disappearance of all lesions * PR=≥30% decrease in diameter of target lesions * Progressive disease (PD)=20% increase in diameter of target lesion; progression of non-target lesion; or ≥1 new lesion(s) For the overall outcome: * SD=Changes not meeting above criteria * Overall Response (OR)=CR+PR * CB=CR+PR+SD

Secondary Endpoints
Objective Response Rate Using RECIST Version 1.1 Criteria.
On the first day of every 3 cycles (each cycle is 28 days) through study completion, an average of 2 years
Change From Baseline at Cycle 10 in the Brief Pain Inventory (BPI) Average Pain Intensity (API) Score.
Daily for the last 7 days of every cycle (each cycle is 28 days) through study completion, an average of 2 years
Change From Baseline at Cycle 10 in the GOunder/Desmoid Tumor Research Tumor Foundation (DTRF) DEsmoid Tumor Symptom Scale (DTSS) - Total Score
Daily for the last 7 days of every cycle (each cycle is 28 days) through study completion, an average of 2 years
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Study Design & Arms
AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Double-Blind Phase - NirogacestatEXPERIMENTALNirogacestat 150 mg by mouth, twice daily
Double-Blind Phase - PlaceboPLACEBO_COMPARATORPlacebo by mouth, twice daily
Open-Label Phase - NirogacestatEXPERIMENTALNirogacestat 150 mg by mouth, twice daily
NirogacestatEXPERIMENTALNirogacestat 150 mg by mouth, twice daily
Nirogacestat 150 mgEXPERIMENTALPatients will receive 3-cycle lead-in with systemic therapy with nirogacestat 150 mg po BID, given continuously.
Interventions
NameTypeDescription
Nirogacestat oral tabletDRUGNirogacestat tablet
Placebo Oral TabletDRUGSugar pill manufactured to mimic nirogacestat 50 mg tablet
NirogacestatDRUGNirogacestat 150 mg by mouth twice-daily continuously for Cycles 1 through 3. Treatment with nirogacestat may continue via this study protocol for up to 24 months (26 cycles of treatment), unless there is progression of disease, intolerance, start of new anticancer therapy, or Subject Study Completion or Termination occurs.
CryoablationPROCEDURECryoablation procedure (single session) of one tumor mass between Cycles 3 and 4 of nirogacestat treatment
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites52

Double-Blind Key Inclusion Criteria: * Participant has histologically confirmed DT/AF (by local pathologist prior to informed consent) that has progressed by ≥ 20% as measured by RECIST v1.1 within 12 months of the screening visit scan. * Participant has: 1. Treatment naïve, measurably progressi...

Countries:United StatesBelgiumCanadaGermanyItalyNetherlandsUnited KingdomJapan
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Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT05949099primaryCompletionDate: changed
LOWMay 26, 2026NCT07170644primaryCompletionDate: changed
LOWMay 24, 2026NCT05949099studyFirstPostDate: changed
LOWMay 24, 2026NCT07170644studyFirstPostDate: changed