Narrative reviewindependent cross-checkabstract checked★ key study I-CAN-108 standard review
Why do people with cancer die?
Why do patients with cancer die?
Overview
Boire A et al.. Nat Rev Cancer 2024 · PMID 38898221 · DOI 10.1038/s41568-024-00708-4
Death in cancer usually results from several organ problems caused by the cancer, including wasting; tumour size alone does not explain it.
Does the study support the specific claim? Partly · Methodological quality: moderate
Plain-language summary
Study explained simply
- What did the researchers want to find out?
Review causes of death in cancer.
- How was the study done?
Narrative review.
- How many people, animals or samples were studied?
Not applicable.
- What was actually found?
Many interlinked causes, including cachexia.
- How large was the observed effect?
Acute events may cause up to half of deaths.
- What do the results mean in everyday life?
Wasting is one way cancer kills.
- What are the study's limitations?
Not systematic.
- What does it say about Elawady's specific claim?
Partly right that tumour mass is not everything; wrong that cancer is not the cause.
- Do the results apply to Germany and Europe?
High.
- What can explicitly not be concluded from this study?
Precise proportions.
Scientific in-depth review
1. Full reference
- Authors
- Boire A et al.
- Journal
- Nat Rev Cancer
- Year
- 2024
- Identifier
- PMID 38898221 DOI 10.1038/s41568-024-00708-4
- Verification
- verified – PubMed efetch 2026-10-26 + Crossref
- Retracted
- no
- Corrections
- none
- Extent checked
- abstract only
- Conflicts of interest and funding
Funding: NIH, Wellcome, CRUK and others; disclosures in full text
2. Research question
Why do patients with cancer die?
3. Study design and population
- Study design
- Narrative review – Narrative review ('Roadmap') of proximal causes of death in cancer
- Population
Patients with advanced cancer
- Country
International
- Period
Published 2024
- Sample size
not applicable
- Inclusion and exclusion criteria
not applicable
4. Methods and endpoints
- Exposure / intervention
Metastatic cancer and its systemic effects
- Comparator
not applicable
- Endpoints
Causes of death
- Statistical methods
not applicable
5. Actual results
- Results
Full-text passages read: systematic data on causes of cancer death are scarce; death certificates often state only 'metastatic carcinoma'. Acute events (thromboembolism, infection, organ failure, haemorrhage) may account for up to half of cancer deaths; others show gradual multi-organ deterioration. Cachexia is common in metastatic cancer, is driven by reduced intake, cytokines (TNF-alpha, IL-1, IL-6), GDF15/TGF-beta signalling, and does not correlate with tumour volume in many cancers; loss of cardiac or respiratory muscle can be fatal. TNF-alpha can reduce appetite via corticotropin-releasing hormone.
- Absolute risks
not applicable
- Authors' conclusion
Cancer mortality is multifactorial and involves inter-connected organ dysfunction; better data on causes of death are needed.
6. Strengths
- Expert authors
- Integrates mechanisms
7. Weaknesses
- Narrative, not systematic
- Few quantitative data
8. Risk of bias
- Orienting tool
- none applicable
- Type of assessment
- simplified assessment (abstract only)
- Full formal assessment
- no
- Overall risk of bias
- not assessable
- Rationale
Narrative review.
9. Assessment of the statistical interpretation
Not applicable.
10. Relevance to the specific claim
Clarifies that wasting and hormonal-inflammatory changes are mechanisms through which cancer kills, not alternatives to dying of cancer.
11. Independent contrary findings
Acknowledges that tumour burden alone does not explain death and that cachexia can be a proximal cause - a partly correct kernel of the claim.
12. Transferability to Germany and Europe
High.
13. Overall methodological judgement
Mixed for the claim: confirms the role of wasting, refutes the separation from cancer.
| Multidimensional assessment | |
|---|---|
| Authenticity of the source | verified |
| Methodological quality | moderate |
| Risk of bias | not assessable |
| Precision of results | not applicable |
| Directness | direct |
| Reproducibility | unknown |
| Consistency with the overall evidence | consistent |
| Regional transferability | high |
| Adequacy of the interpretation (by the archive) | not applicable |
14. Open questions
Systematic autopsy studies.
15. Linked fact checks
- Cancer patients do not die of cancer itself but of wasting and cortisone (hormonal disturbance). – Studies with mixed or unclear results