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Pembrolizumab

Phase 2

Esophagogastric Adenocarcinoma | Small molecule | Oncology |Organon & Co.|Last Updated: Jun 6, 2025

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
UNCONTROLLEDBiomarker
Total Trials1
Total Enrollment31
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT05504720Evaluating Pembrolizumab, Trastuzumab and FLOT as Perioperative Treatment of HER2-positive, Localized Esophagogastric AdenocarcinomaPHASE2 ACTIVE NOT_RECRUITING 31Feb 13, 2023Dec 1, 2027Jun 6, 202513 Germany
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Study Endpoints
Primary Endpoints
Disease-free survival after 2 years co-primary endpoint
2 years after enrolment

Disease-free survival is defined as the proportion of patients being tumor/disease free and alive 2 years after enrolment.

Pathological complete response rate co-primary endpoint
after surgery, i.e. approx. 12 weeks after enrolment

The pCR rate is defined as the absence of residual tumor based on evaluation of the resected esophagogastric specimen in the primary tumor by local pathology.

Secondary Endpoints
Overall response rate (ORR)
up to 1 year after enrolment
Overall survival (OS)
up to 52 months
R0 resection rate
after surgery, i.e. approx. 12 weeks after enrolment
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Study Design & Arms
AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Pembrolizumab TrastuzumabEXPERIMENTALSingle arm with pembrolizumab (200 mg flat dose over 30 min IV) on day 1, 22 and 43 plus trastuzumab (loading dose 8 mg/kg IV over 90 min at day 1 and maintenance dose 6 mg/kg IV over 30 min) on day 22 and 43 plus FLOT in four 2-week treatment cycles prior to undergoing surgery. Following surgery, patients will receive four further 2-week cycles of pembrolizumab+trastuzumab + FLOT followed by pembrolizumab (200 mg flat dose) and trastuzumab (6 mg/kg) alone for up to 11 further cycles (Q3W).
Interventions
NameTypeDescription
PembrolizumabDRUG200 mg flat dose, IV, over 30 minutes; day 1, 22, 43 (8 weeks) pre- and post-surgery, followed by post chemotherapy phase day 1 q3w for 11 cycles; max. 17 applications
TrastuzumabDRUGloading dose 8 mg/kg IV over 90 min: day 1 pre- and post-surgery; maintenance dose 6 mg/kg IV over 30 min: Day 22, 43 pre- and post-surgery; followed by 6 mg/kg post chemotherapy phase, day 1 q3w for 11 cycles; max. 17 applications
FLOTDRUGDocetaxel 50 mg/m² IV over 1 hour plus Oxaliplatin 85 mg/m² IV over 2 hours plus Folinic Acid 200 mg/m² IV over 1 hour plus 5-FU 2600 mg/m² IV over 24 hours every 2 weeks (day 1, 15, 29, 43) for 8 weeks pre- and 8 weeks post-surgery
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites13

Inclusion Criteria: 1. The participant provides written informed consent for the trial. 2. Male/female\* participants who are at least 18 years of age on the day of signing informed consent. \*There are no data that indicate special gender distribution. Therefore, patients will be enrolled in t...

Countries:Germany
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Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT05504720primaryCompletionDate: changed
LOWMay 24, 2026NCT05504720studyFirstPostDate: changed