After splenectomy there is a lasting increased risk of serious infections (pneumonia, meningitis, sepsis); the spleen has no full functional substitute.
Original statement
والطحال مرشّحٌ مناعي لا بديل وظيفي له بالكامل
verbatim according to source. Translation by the project; the Arabic wording is authoritative.
Translation
After splenectomy there is a lasting increased risk of serious infections (pneumonia, meningitis, sepsis); the spleen has no full functional substitute.
Origin
- Source status
- Archive editors
- Attribution
- Archive editors (eltayebat.com); not necessarily Elawady's own words
- Origin
- https://eltayebat.com/rule/unnecessary-organ-removal/
- Attribution uncertainty
- Editorial summary/narrative and study selection written by the archive operators; the archive states that the cited research documents harm independently of Dr. Diaa's words.
- Claimed mechanism
Loss of immune filter.
- Claimed health effect
Serious infections.
- Population concerned
Splenectomized patients
- Geographic restriction by Elawady
not applicable
Diverging source versions
- Source status
- Video transcript (own words)
- Attribution
- Elawady (machine transcript)
- Video
- Dr Diaa Al Awady د ضياء العوضي is live! الدراسات اللي ينشرها لمعرفة مدي تخبط الطب حتي ٢٠٢٥ (Open source)
- Published
- 26 July 2025
- Timestamp
- not available (transcript has no timings)
- Attribution uncertainty
- Archive transcript (YouTube CC or AI-generated); wording may contain transcription errors; no timestamps available.
Scientific assessment
True – The statement is supported by robust evidence.
Certainty of evidence: moderate – Further research may still affect the assessment.
1. What was claimed?
Infection risk after splenectomy.
2. What is demonstrably correct?
Pneumonia/meningitis/septicaemia RR 1.9-3.4, persisting >10 years (A-ORG-16); OPSI 1.11 per 1000 patient-years (A-ORG-18); infection 3.2% and mortality 1.4% over ~7 years (I-ORG-11).
3. What is wrong or exaggerated?
Absolute risk of overwhelming infection is low (about 1 per 1000 patient-years), which the archive does not state. In the registry study (A-ORG-18) the risk was highest in the first years after surgery and about 71% lower after registry-based prevention (relative rate 0.29); that study has no non-splenectomy comparator, so the lasting excess risk rests on A-ORG-16.
4. What remains unclear?
Current risk with modern vaccination.
5. Which studies support it?
6. Which studies contradict it?
None against the direction.
7. What applies to Germany and Europe?
Most cited cohorts are Scandinavian (Denmark, Sweden) and directly European; RCTs from the UK and Finland are directly transferable. Guidelines in Europe also emphasize defined indications (not verified here in detail).
8. What is known about Egypt?
No Egypt-specific data on rates or outcomes of tonsillectomy, cholecystectomy, hysterectomy, splenectomy or thyroid surgery were identified in this review.
9. What practical conclusion is appropriate?
Vaccination and prompt treatment of fever are essential after splenectomy; splenectomy remains necessary in some situations (e.g., trauma, certain blood diseases).
Assessment details
- Rationale for certainty of evidence
Consistent across cohorts, registries and reviews; well established in clinical practice (vaccination recommendations).
- Source quality
Correctly reported.
- Regional transferability
Applicable.
- Individual exceptions
Risk highest in children and haematological disease; reduced by vaccination.
- Regional scope of the claim
- general (biological/medical)
- Last reviewed
- 26 October 2026 provisional
Scientific evidence in detail
Scientifically well supported – The claim agrees with consistent, high-quality evidence.
Research question: After splenectomy, is there a lasting increased risk of serious infection (pneumonia, meningitis, sepsis) compared with people with a spleen?
Research question in detail (PECO)
- Population
- People after splenectomy
- Intervention or exposure
- Splenectomy / asplenia
- Comparison
- General population; patients with the same indications without splenectomy
- Geographic scope
- universal biology
- Outcomes
- Serious infection
- OPSI
- Infection mortality
Study results as reported by the authors. Our assessment follows below.
What speaks for the claim?
Infections after spleen removal in Denmark
Thomsen RW et al.. Ann Intern Med 2009 · PMID 19841456 · DOI 10.7326/0003-4819-151-8-200910200-00008 Cohort studyabstract checkednewly addedDanish national cohort: infection risk remained elevated more than a year after splenectomy.
- Actual result
- HR 2.5 (2.2-2.8) vs population after 365 days; HR 1.2 (1.1-1.4) vs indication-matched.
- Methodological quality
- high (national cohort with indication-matched comparator)
- Relevance
- direct
- Limitations
- Surveillance bias possible.
Severe infections without a spleen
Chong J et al.. Epidemiol Infect 2017 · PMID 27776576 · DOI 10.1017/S0950268816002405 Cohort studyfull text, structured risk-of-bias assessmentAustralian registry: OPSI 1.11/1000 patient-years, highest in first 3 years; much lower after education/vaccination.
- Actual result
- 38.83/1000 PY first 3 y; 0.62-3.67 thereafter.
- Methodological quality
- moderate (registry, full text)
- Relevance
- direct
- Limitations
- Registry population.
Long-term risks after spleen removal in US veterans
Kristinsson SY et al.. Haematologica 2014 · PMID 24056815 · DOI 10.3324/haematol.2013.092460 Cohort studyabstract checkedUS veterans: pneumonia, meningitis and septicaemia risks raised for > 10 years.
- Actual result
- RR 1.9-3.4.
- Methodological quality
- moderate (cohort)
- Relevance
- direct
- Limitations
- Men only; confounding by indication.
What speaks against the claim?
No high-quality evidence against the claim was found.
What does the overall evidence say?
Editorial assessment based on the studies above – not itself a study result.
Which position is better supported?
Lasting increased infection risk after splenectomy is well established and is the basis of lifelong vaccination and prophylaxis recommendations.
Why some studies weigh more
Consistent cohorts with different comparators plus clear biological mechanism and guideline consensus.
Is a causal relationship established? Yes, established Biological mechanism (loss of splenic filtering and IgM memory B cells) plus consistent risk elevation even versus indication-matched patients.
Remaining uncertainty
Size of the late excess attributable to the operation itself (smaller vs indication-matched patients).
Justified conclusion
Correct.
Why do studies seem to disagree?
Large relative risks versus the general population shrink versus indication-matched patients (Thomsen 2009), because part of the risk comes from the underlying disease; the residual excess is still present.
Does this depend on the country?
- General biological effects
- Universal.
- Eating habits
- Not relevant to this claim.
- Origin of the food
- Not applicable.
- Contaminants
- Not applicable.
- National production conditions
- Not applicable.
- Legal rules
- Not applicable.
- Actual monitoring data
- No Egyptian data identified; vaccination practice may differ.
A regional difference that changes the conclusion is not supported by robust data.
Statistical re-check
- Log-symmetry of reported OR/HR CIs – Approximately symmetric given one-decimal rounding recalculated
Certainty of the overall evidence (GRADE, simplified)
- Main outcome
- Long-term serious infection after splenectomy
- Starting level
- low (observational studies)
- Reasons for upgrading
- large effect
- biological gradient/mechanism
- Result
- moderate
Simplified assessment by a single reviewer, following the GRADE approach; not a formal GRADE panel. GRADE rates the body of evidence for one outcome, not individual studies.
Clinical guidelines and official statements checked
- Spleen Australia: Guidelines for the prevention of sepsis in patients with asplenia and hyposplenism in Australia and New Zealand (2017) · Original publication
Asplenia/hyposplenism carries increased risk of fulminant sepsis with high mortality; recommends vaccination protocols and antimicrobial prophylaxis (abstract; I-ORG-116).
Search strategy
Documented literature searches for this review (search strings in the original database syntax).
| Database | Date | Search | Looking for | Hits | Included |
|---|---|---|---|---|---|
| PubMed | 26 October 2026 | (asplenia OR splenectomy OR hyposplenism) AND (guideline[ti] OR guidelines[ti] OR recommendations[ti]) AND infection | guidelines | 65 | |
| Europe PMC | 26 October 2026 | (TITLE:splenectomy OR TITLE:splenectomised OR TITLE:splenectomized OR TITLE:asplenia) AND (TITLE:infection OR TITLE:sepsis OR TITLE:"venous thromboembolism" OR TITLE:thrombosis) AND (cohort OR "population-based") | both directions | 70 | |
| PubMed | 26 October 2026 | Thomsen RW[au] AND splenectomy | supporting evidence | 3 | |
| PubMed | 26 October 2026 | (splenectomy[ti] OR asplenia[ti]) AND (infection[ti] OR sepsis[ti]) AND (systematic review[pt] OR meta-analysis[pt]) | contradicting evidence | 1 | |
| Europe PMC | 26 October 2026 | (TITLE:"post-splenectomy" OR TITLE:asplenia) AND (TITLE:"overwhelming" OR TITLE:OPSI) AND (incidence OR risk) AND PUB_YEAR:[2015 TO 2026] | supporting evidence | 8 |
Open questions
Residual risk with full modern vaccination.
How deeply was this checked?
5 linked studies: 1 checked in full text (1 of them with a structured risk-of-bias assessment), 4 on the basis of the abstract, 0 bibliographically only. No formal assessment with two independent reviewers and no independent human expert review has taken place yet.
Last scientific review: 26 October 2026
History of the verdict
In plain language
The archive says that people without a spleen are at risk of serious infections. This is correct and well known. Severe infections are uncommon (about 1 per 1000 patient-years) but can be life-threatening, so vaccinations and quick treatment of fever are important.
Studies on this claim
Studies supporting the claim (5)
-
Long-term risks after spleen removal in US veterans
Kristinsson SY et al.. Haematologica 2014 · PMID 24056815 · DOI 10.3324/haematol.2013.092460Cohort studycited by the Tayebat archiveabstract checked★ key studySerious infections were 2-3 times more frequent and blood clots about 2 times more frequent after spleen removal.
Does the study support the specific claim? Partly · Methodological quality: moderate · Certainty of evidence: see overall assessment of the claim
Original publication · Scientific details
Study explained simply
- What did the researchers want to find out?
Splenectomy risks
- How was the study done?
Cohort
- How many people, animals or samples were studied?
8149
- What was actually found?
Higher infections, clots, cancers
- How large was the observed effect?
RR 1.9-3.4 infections
- What do the results mean in everyday life?
Vaccination and prophylaxis are important
- What are the study's limitations?
Confounding by indication
- What does it say about Elawady's specific claim?
Supports infection risk; cancer less certain
- Do the results apply to Germany and Europe?
Applicable
- What can explicitly not be concluded from this study?
Causation for cancer
-
Severe infections without a spleen
Chong J et al.. Epidemiol Infect 2017 · PMID 27776576 · DOI 10.1017/S0950268816002405Cohort studycited by the Tayebat archivefull text, structured risk-of-bias assessmentSevere infections needing intensive care occurred in about 1 per 1000 patient-years.
Does the study support the specific claim? Yes · Methodological quality: moderate · Certainty of evidence: see overall assessment of the claim
Original publication · Scientific details
Study explained simply
- What did the researchers want to find out?
OPSI
- How was the study done?
Registry
- How many people, animals or samples were studied?
3274
- What was actually found?
Uncommon but serious; highest in first 3 years and in older patients; lower after registry education
- How large was the observed effect?
1.11/1000 PY
- What do the results mean in everyday life?
Vaccination matters
- What are the study's limitations?
Self-reported, no control group, self-selected registry; counts inconsistent (47 vs 43)
- What does it say about Elawady's specific claim?
Supports with context
- Do the results apply to Germany and Europe?
Applicable
- What can explicitly not be concluded from this study?
Causation
-
Infections after spleen removal
Bisharat N et al.. J Infect 2001 · PMID 11798256 · DOI 10.1053/jinf.2001.0904Systematic reviewindependent cross-checkabstract checkedAbout 3% developed serious infections and 1.4% died of them over about 7 years in older studies.
Does the study support the specific claim? Yes · Methodological quality: low · Certainty of evidence: see overall assessment of the claim
Original publication · Scientific details
Study explained simply
- What did the researchers want to find out?
OPSI
- How was the study done?
Review
- How many people, animals or samples were studied?
19,680
- What was actually found?
Infection 3.2%
- How large was the observed effect?
3.2%/1.4%
- What do the results mean in everyday life?
Infection risk is real; vaccination matters
- What are the study's limitations?
Old data
- What does it say about Elawady's specific claim?
Supports
- Do the results apply to Germany and Europe?
Applicable
- What can explicitly not be concluded from this study?
Current risk with vaccines
-
Infections after spleen removal in Denmark
Thomsen RW et al.. Ann Intern Med 2009 · PMID 19841456 · DOI 10.7326/0003-4819-151-8-200910200-00008Cohort studyindependent cross-checkabstract checked★ key studyPeople without a spleen had more serious infections for years after surgery, although part of the extra risk came from their underlying disease.
Infection risk elevated beyond one year (HR 2.5 vs population; 1.2 vs indication-matched).
Does the study support the specific claim? Yes · Methodological quality: high · Certainty of evidence: see overall assessment of the claim
Original publication · Scientific details
Study explained simply
- What did the researchers want to find out?
Measure long-term infection risk after splenectomy
- How was the study done?
National cohort with three comparison groups
- How many people, animals or samples were studied?
3812 Danish patients
- What was actually found?
Infection risk raised early and still 2.5-fold after one year
- How large was the observed effect?
HR 2.5 (>1 year) vs population
- What do the results mean in everyday life?
People without a spleen need vaccinations and fast care for fever
- What are the study's limitations?
Possible surveillance bias
- What does it say about Elawady's specific claim?
Supports the claim
- Do the results apply to Germany and Europe?
Directly applicable
- What can explicitly not be concluded from this study?
Cannot fully separate surgery from disease effects
-
Guideline for people without a working spleen
Kanhutu K et al.. Intern Med J 2017 · PMID 27925427 · DOI 10.1111/imj.13348Guideline / position statementindependent cross-checkabstract checkedPeople without a spleen have a higher risk of severe, fast sepsis and need vaccinations and preventive measures.
Guideline accepts increased risk of fulminant sepsis in asplenia.
Does the study support the specific claim? Yes · Methodological quality: moderate · Certainty of evidence: see overall assessment of the claim
Original publication · Scientific details
Study explained simply
- What did the researchers want to find out?
Recommend sepsis prevention in asplenia
- How was the study done?
National guideline
- How many people, animals or samples were studied?
n/a
- What was actually found?
Higher sepsis risk; vaccination and prophylaxis recommended
- How large was the observed effect?
n/a
- What do the results mean in everyday life?
Keep vaccinations up to date; seek care for fever
- What are the study's limitations?
Abstract only
- What does it say about Elawady's specific claim?
Supports the claim
- Do the results apply to Germany and Europe?
Applicable
- What can explicitly not be concluded from this study?
Not quantitative
No study in this group is marked as key.
Studies contradicting or limiting the claim (0)
No studies in this group.
Studies with mixed or unclear results (0)
No studies in this group.
Regional context
Germany / EU
Most cited cohorts are Scandinavian (Denmark, Sweden) and directly European; RCTs from the UK and Finland are directly transferable. Guidelines in Europe also emphasize defined indications (not verified here in detail).
Egypt
No Egypt-specific data on rates or outcomes of tonsillectomy, cholecystectomy, hysterectomy, splenectomy or thyroid surgery were identified in this review.
What applies in my country?
General scientific assessment
True Correct: lasting infection risk after splenectomy is well established.
This statement concerns biological or medical relationships. The scientific assessment above applies regardless of the country; country-specific food data do not change it.
References
- Long-term risks after splenectomy among 8,149 cancer-free American veterans: a cohort study with up to 27 years follow-up.. Kristinsson SY et al.. Haematologica 2014 · PMID 24056815 · DOI 10.3324/haematol.2013.092460
- Overwhelming post-splenectomy sepsis in patients with asplenia and hyposplenia: a retrospective cohort study.. Chong J et al.. Epidemiol Infect 2017 · PMID 27776576 · DOI 10.1017/S0950268816002405
- Risk of infection and death among post-splenectomy patients.. Bisharat N et al.. J Infect 2001 · PMID 11798256 · DOI 10.1053/jinf.2001.0904
- Risk for hospital contact with infection in patients with splenectomy: a population-based cohort study.. Thomsen RW et al.. Ann Intern Med 2009 · PMID 19841456 · DOI 10.7326/0003-4819-151-8-200910200-00008
- Spleen Australia guidelines for the prevention of sepsis in patients with asplenia and hyposplenism in Australia and New Zealand.. Kanhutu K et al.. Intern Med J 2017 · PMID 27925427 · DOI 10.1111/imj.13348