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4

Indication details

Combined Agent(s)
Fluoropyrimidine + platinum-containing ChT
Control Arm
Placebo + fluoropyrimidine + platinum-containing ChT
Therapeutic Indication
Pembrolizumab in combination with fluoropyrimidine and platinum-containing chemotherapy, is indicated for the first-line treatment of locally advanced unresectable or metastatic HER2-negative gastric or gastro-oesophageal junction adenocarcinoma in adults whose tumours express PD-L1 with a CPS ≥ 1
Tumour Type
Gastrointestinal Cancers
Tumour Sub-type
Gastric or gastroesophageal junction adenocarcinoma
Tumour Stage
Locally advanced unresectable or metastatic
Tumour Sub-Group
HER2-, PD-L1 with a CPS ≥1*
Trial Name
KEYNOTE-859
NCT Number
NCT03675737
Trial Phase
Phase III

Approval details

FDA Approval
FDA approval November 2023
EMA Approval
EMA (CHMP) October 2023 EC decision December 2023
Comment
FDA approval is irrespective of PD-L1 status

Primary Outcome(s)

Primary Outcome(s)
OS
Evaluated Outcome
OS
Form(s)
Form 2a

Outcome Data

OS Control
11.4 months - 2-year 18%
OS Gain
1.6 months - 2-year 12%. <20% of patients on exploratory arm evaluable at 24 months
OS HR
0.74 (0.65-0.84)

Adjustments

QoL Comment
Not qualified for an ESMO-MCBS credit

Score (after adjustments)

Non-curative score

4

Comment
*In the ITT population, 1235 participants (78%) had tumours with a PD-L1 CPS
of 1 or higher

Scorecard details

ESMO-MCBS version
ESMO-MCBS v1.1
Scorecard ID
400
Scorecard version
1
Issue date
17.11.2023
Last update
26.11.2024
Pembrolizumab KEYNOTE-859

PRELIMINARY SCORE

OS

ADJUSTMENTS

Not qualified for an ESMO-MCBS credit
Pembrolizumab KEYNOTE-859

SCORE

Overall Survival / Disease-Free Survival / Pathological Complete Response
4
Overall Survival
Progression-Free Survival
Non-inferiority (Improved Quality of Life or Reduced Adverse Events) / Response Rate
Overall Response Rate / Duration of Response
Gastrointestinal Cancers
Pembrolizumab in combination with fluoropyrimidine and platinum-containing chemotherapy, is indicated for the first-line treatment of locally advanced unresectable or metastatic HER2-negative gastric or gastro-oesophageal junction adenocarcinoma in adults whose tumours express PD-L1 with a CPS ≥ 1
Pembrolizumab + Fluoropyrimidine + platinum-containing ChT
Placebo + fluoropyrimidine + platinum-containing ChT

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    Legend

    Information about symbols, abbrevations and color codes

    Red = negative
    Green = positive
    Grey = neutral
    ? Grey + ? = neutral with pending data
    DFS
    Disease-Free Survival
    DoR
    Duration of Response
    EFS
    Event-Free Survival
    HR
    Hazard Ratio
    NEB
    No evaluable benefit
    NI
    Non-inferiority Study
    ORR
    Overall Response Rate
    OS
    Overall Surival
    pCR
    Pathological Complete Response/Remission
    PFS
    Progression-Free Survival
    QoL
    Quality of Life
    RFS
    Relapse-Free Survival
    RR
    Response Rate

    QoL adjustments

    Other adjustments*

    Serious and disabling adverse effects

    Red = negative / deterioration

    Green = positive / improvement

    QoL adjustments

    Red = negative / deterioration

    Green = positive / improvement

    Other adjustments*

    Red = negative / deterioration

    Green = positive / improvement

    Serious and disabling adverse effects

    Red = negative / deterioration

    Green = positive / improvement

    * Other adjustments include:

    - Long-term plateau in the survival curve
    - Long-term plateau in the PFS curve
    - Early stopping or crossover
    - Only improved PFS mature data shows no OS advantage and no improved Qol.

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