MARS2
Mesothelioma and Radical Surgery 2: a Multicentre Randomised Trial Comparing (Extended) Pleurectomy Decortication Versus no (Extended) Pleurectomy Decortication for Patients With Malignant Pleural Mesothelioma (Mars 2).
- NCT02040272 ↗
- v1.0.0 · edition 1
- updated Oct 8, 2026
- Deep
MARS 2 frames clinicians’ central question: should lung-sparing surgery be added to chemotherapy for people with pleural mesothelioma, and in what circumstances? Discussion covers patient selection, staging and tissue diagnosis, operative extent and center expertise, survival analysis, chemotherapy sequencing and completion, and systemic or radiotherapy alternatives. Other topics include treatment deferral and holds, quality of life, informed choice, costs, specialist referral, drug access, regional applicability, trial design and safety oversight.
Findings
12 findings · titles free- 01
The central dispute is whether selected surgery can continue outside research—not whether surgery should remain routine
- 02
Changing the surgical decision can change drug access, referral, staging and diagnostic behavior
- 03
Early-stage epithelioid selection is a proposed exception, not a demonstrated rescue of surgery
- 04
Systemic-treatment delivery is debated as both a competing explanation and a consequence of surgery
Sample finding · freeA podcast host asked whether differing use of postoperative chemotherapy could weaken the MARS 2 comparison, or whether its importance was limited relative to the operation itself.
Source: podcast, 2024-05-01 · paraphrased; the full report links the source
- 05
Expertise arguments intersect with operative extent, diaphragm loss and recovery—not just center volume
Sample finding · freeA podcast moderator asked whether the independent monitoring committee had assessed interim data and whether safety concerns warranted stopping the study earlier.
Source: podcast, 2023-09-26 · paraphrased; the full report links the source
- 06
Survival language and crossing-curve analysis are genuine points of disagreement
- 07
Quality time, costs and informed choice matter alongside survival—and patient preference does not compel an operation
- 08
Systemic treatment is a favored alternative, but histology, toxicity and conditions for holding treatment remain important
- 09
Radiotherapy is raised as a next step, but safety, treatment setting and appropriate observation limit the enthusiasm
- 10
Intraoperative adjuncts expose a distinct disagreement about benefit, renal harm and unproven less-radical approaches
- 11
Global implementation depends on diagnostic concentration, specialist capacity and the feasibility of generating local evidence
- 12
Praise for randomized evidence coexists with concern about bias, recruitment communication and the treatment of dissent
The full report gives each finding its interpretation, the attributed views behind it, counterviews, limits and the verified claims with exact source passages.
What evidence threshold do clinicians require before offering selected surgery outside a trial, and how do they distinguish an exception from routine practice?
Raised by the leading finding. The report shows what clinicians said and the sources behind it; it does not settle the question.
By the numbers
free- 165HCP commentary sources screened
- 134sources cited by verified claims
- 141found in screened sources
- 114matched to verified clinician profiles
- 98voices cited in the report
- 1,094verified claims, each linked to its source
- 12findings
Screened sources were retrieved for this trial. Cited sources back at least one verified claim and include primary sources used for context. No count estimates how many clinicians hold a view. Size (Deep) is set by the 131 commentary sources cited.
What's inside
free| Section | Items | Access |
|---|---|---|
| Findings with interpretation, counterviews and limits | 12 | Titles free |
| Detailed analysis | 13 sections | Paid |
| Verified claims with exact source passages | 1,094 | Paid |
| Trial aspects mapped | 13 | Free |
| Sources with links | 134 | Counts free |
| Speaker attribution for cited voices | 98 | Paid |
Trial aspects
13 discussed · 0 no commentary · 0 incomplete| Aspect | Claims | Sources |
|---|---|---|
| Routine, experimental and exceptional use of cytoreductive surgery | 26 | 17 |
| Resectability labels, systemic-treatment access and specialist referral | 22 | 7 |
| Histology, early-stage selection, fitness and proposed biomarkers | 44 | 13 |
| Imaging, invasive staging and tissue acquisition | 64 | 8 |
| Chemotherapy sequence, completion and subsequent treatment | 39 | 9 |
| Operative extent, quality assurance, mortality and oversight | 48 | 12 |
| Survival estimands, late curve crossing and harm terminology | 28 | 17 |
| Quality of life, costs, meaningful benefit and patient choice | 44 | 13 |
| Systemic alternatives and conditions for deferral or treatment holds | 38 | 16 |
| Radiotherapy, surveillance and multimodality sequencing | 30 | 6 |
| Intraoperative adjuncts and less-radical local approaches | 24 | 4 |
| Regional implementation and evidence-generation capacity | 54 | 9 |
| Randomized evidence, recruitment equipoise and cross-specialty debate | 69 | 27 |
An aspect marked incomplete is a question the public commentary did not let us answer. We show it rather than hide it.
Sources
free| Channel | Screened | Cited | |
|---|---|---|---|
| X threads | 136 | 102 | |
| Podcasts | 22 | 22 | |
| YouTube | 7 | 7 | |
| Primary sources, cited for context, not screened | |||
| Publications | – | 3 | |
max 60 / quarter
- Screened window
- 2021-11-06 → 2026-09-16
- Cited window
- 2023-02-10 → 2026-09-12
- Retrieved
- 2026-10-08
The trial
from ClinicalTrials.gov- Title
- Mesothelioma and Radical Surgery 2: a Multicentre Randomised Trial Comparing (Extended) Pleurectomy Decortication Versus no (Extended) Pleurectomy Decortication for Patients With Malignant Pleural Mesothelioma (Mars 2).
- Registry
- NCT02040272
- Study IDs
- MARS2
- Sponsor
- Royal Brompton & Harefield NHS Foundation Trust
- Collaborators
- University of Bristol, National Institute for Health Research, United Kingdom
- Design
- Not applicable · interventional, randomized, parallel, na
- Status
- Unknown
- Enrollment
- 328 estimated
- Start
- 2015-05
- Primary completion
- 2020-09 estimated
- Primary endpoint
- Survival
- Interventions
- 1 registered
Scope and limits
freeThis report does not judge efficacy, estimate HCP prevalence or consensus or give treatment advice.
- Sources were found by searching for the trial's name, registry number and known aliases. Discussion that refers to the trial without naming it may be missing.
- For 1 recording, a transcript separated by speaker was not available, so quotes come from the original automatic transcript and may lack speaker labels.
- 24 points raised by the independent review are not yet resolved in this edition, such as a clinician view not yet captured as evidence or a qualifier to restore. The next refresh takes them up.
- 5 further source limits are recorded in the machine-readable scope of this record.
- The evidence describes reviewed commentary, not a representative survey of HCP opinion, guideline adoption or surgical utilization.
- Multiple sources may repeat the same person, event or discussion; source counts must not be interpreted as independent clinician counts.
- Some statements are reported opinions, patient recollections, institutional accounts or anecdotal experiences rather than direct clinician testimony or controlled evidence.
- Uncertain speakers remain unnamed; adjacent named contributions do not establish who spoke a continuation.
- Some accounts use inconsistent procedure names, endpoint descriptions or numerical wording. They are retained as commentary rather than silently corrected into trial facts.
- Several subgroup and cross-study interpretations lack effect estimates, uncertainty intervals or appropriate nonsurgical comparisons in the cited passages.
- Treatment-access, professional-context and practice descriptions are source- and time-specific, not current global verification.
- The recruitment publication did not interview over one-third of approached professionals and lacked consultation recordings from half the study sites.
- Searches may have missed unnamed trial references or transcription variants, and five identified videos could not be reviewed.
- One podcast's available transcript leaves some speaker identities uncertain; this limits attribution but does not justify assigning those views to rostered participants.
How reports are built and checked: Methods.
Editions and corrections
free| Version | Date | Change |
|---|---|---|
| v1.0.0 | 2026-10-08 | Edition 1, first accepted edition |
Last checked Oct 8, 2026. Versions follow semver: a new or changed finding is a minor version, more evidence without a material change is a patch. No corrections.
release 290b3332d75649e30eaf65b95ff0aa9a2bbf2fa29b20c6a08b2971a3aad890fe
Cite this report
Erudio Health. MARS2 (NCT02040272): HCP commentary report. Edition 1, v1.0.0. Accepted 2026-10-08. https://www.erudio.com/reports/mars2-nct02040272
For agents
The same record as JSON or Markdown, or through the Erudio MCP server.
curl https://www.erudio.com/reports/mars2-nct02040272.json
curl https://www.erudio.com/reports/mars2-nct02040272.md
# MCP (https://mcp.erudio.com/mcp)
get_report_card({ "slug": "mars2-02040272" })