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NCT04166734 · OUTCOME

Overall Response Rate

Pembrolizumab and Hypofractionated Stereotactic Radiotherapy in Patients With Malignant Pleural Mesothelioma · Source last updated 2026-02-04

Results reported by the registry submitting party. Population, time horizon, units and missing values must be read together.

Measure
COUNT_OF_PARTICIPANTS
Unit
Participants
Interval / dispersion
Not reported
Time frame
Response assessed from start of pembrolizumab, every 9 weeks for the first 6 months, then every 12 weeks thereafter, until the first instance of documented disease progression, start of new anti-cancer treatment, death or end of study (24 months)

What was measured

Proportion of patients with best recorded response as assessed using RECIST v1.1 of complete or partial response

Analysis population: All patients who commenced trial treatment and who were assessed at least once for response

Groups in this outcome

Initial Safety Cohort

Patients will receive an initial dose of pembrolizumab in week 1 dosed at 200 mg. They will then receive SBRT dosed at 30 Gy in 3 fractions (#) alternate days in week 3. Treatment with pembrolizumab will be continued dosed at 200 mg given every 3 weeks. Pembrolizumab: Pembrolizumab will be continued dosed at 200 mg given every 3 weeks Drug: Pembrolizumab Pembrolizumab in week 1 dosed at 200 mg (prior to SBRT) and then treatment with pembrolizumab will be continued dosed at 200 mg given every 3 weeks. Stereotactic Body Radiotherapy (SBRT): Stereotactic Body Radiotherapy (SBRT) 30 Gy 3 fractions (#)

Expansion Cohort

An additional 12 patients will be recruited for this cohort. Patients will receive an initial dose of pembrolizumab at 200 mg in week 1. This will be followed in by SBRT dosed at 30 Gy in 3 fractions (#) alternate days in week 3. Treatment with pembrolizumab will be continued dosed at 200 mg given every 3 weeks. Pembrolizumab: Pembrolizumab will be continued dosed at 200 mg given every 3 weeks Drug: Pembrolizumab Pembrolizumab in week 1 dosed at 200 mg (prior to SBRT) and then treatment with pembrolizumab will be continued dosed at 200 mg given every 3 weeks. Stereotactic Body Radiotherapy (SBRT): Stereotactic Body Radiotherapy (SBRT) 30 Gy 3 fractions (#)

Group identifiers and denominators belong to this outcome only. They may differ in another outcome or in safety reporting.

Analysis denominator · Participants

GroupSource count
Initial Safety Cohort5
Expansion Cohort0

Reported measurements

Source class 1
Values in Participants · Interval/dispersion: Not reported
GroupValueSpreadLowerUpperComment
Initial Safety Cohort1Not reportedNot reportedNot reportedNot reported
Expansion Cohort0Not reportedNot reportedNot reportedNot reported
Complete source fields
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        value
        1
      2. group Id
        OG001
        value
        0
denoms
  1. counts
    1. group Id
      OG000
      value
      5
    2. group Id
      OG001
      value
      0
    units
    Participants
description
Proportion of patients with best recorded response as assessed using RECIST v1.1 of complete or partial response
groups
  1. description
    Patients will receive an initial dose of pembrolizumab in week 1 dosed at 200 mg. They will then receive SBRT dosed at 30 Gy in 3 fractions (#) alternate days in week 3. Treatment with pembrolizumab will be continued dosed at 200 mg given every 3 weeks. Pembrolizumab: Pembrolizumab will be continued dosed at 200 mg given every 3 weeks Drug: Pembrolizumab Pembrolizumab in week 1 dosed at 200 mg (prior to SBRT) and then treatment with pembrolizumab will be continued dosed at 200 mg given every 3 weeks. Stereotactic Body Radiotherapy (SBRT): Stereotactic Body Radiotherapy (SBRT) 30 Gy 3 fractions (#)
    id
    OG000
    title
    Initial Safety Cohort
  2. description
    An additional 12 patients will be recruited for this cohort. Patients will receive an initial dose of pembrolizumab at 200 mg in week 1. This will be followed in by SBRT dosed at 30 Gy in 3 fractions (#) alternate days in week 3. Treatment with pembrolizumab will be continued dosed at 200 mg given every 3 weeks. Pembrolizumab: Pembrolizumab will be continued dosed at 200 mg given every 3 weeks Drug: Pembrolizumab Pembrolizumab in week 1 dosed at 200 mg (prior to SBRT) and then treatment with pembrolizumab will be continued dosed at 200 mg given every 3 weeks. Stereotactic Body Radiotherapy (SBRT): Stereotactic Body Radiotherapy (SBRT) 30 Gy 3 fractions (#)
    id
    OG001
    title
    Expansion Cohort
param Type
COUNT_OF_PARTICIPANTS
population Description
All patients who commenced trial treatment and who were assessed at least once for response
reporting Status
POSTED
time Frame
Response assessed from start of pembrolizumab, every 9 weeks for the first 6 months, then every 12 weeks thereafter, until the first instance of documented disease progression, start of new anti-cancer treatment, death or end of study (24 months)
title
Overall Response Rate
type
SECONDARY
unit Of Measure
Participants

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Preserved source evidence · Not medical advice