Evidence map›Paper›PMID 34899730›Full record

SynthesisFrontiers in immunology2021

Early Thymectomy Is Associated With Long-Term Impairment of the Immune System: A Systematic Review.

Nara Vasconcelos Cavalcanti, Patrícia Palmeira, Marcelo Biscegli Jatene, Mayra de Barros Dorna, Magda Carneiro-Sampaio

Open access · goldAbstract readSystematic Review
In one paragraph

Synthesis in Frontiers in immunology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed
3.4field-weighted citation impact, top 6% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

27 citing papers in PubMed, 39 citations in OpenAlex.

  1. Article
  2. Long-Term Cancer and Mortality After Thymectomy.European journal of neurology · 2026
    Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Review
  9. Article
  10. Endocarditis in Adults with Congenital Heart Disease.Methodist DeBakey cardiovascular journal · 2026
    Review
  11. Review
  12. Review
  13. Article
  14. Informed clinical decisions by outfoxing human FOXN1 variants.The Journal of allergy and clinical immunology · 2025
    Review
  15. Article
  16. Article
  17. Review
  18. Article
  19. Article
  20. Glucocorticoids impair T lymphopoiesis after myocardial infarction.American journal of physiology. Heart and circulatory physiology · 2024
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 1 institution in 1 country.

Nara Vasconcelos CavalcantiChildren's Hospital, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HC-FMUSP), São Paulo, Brazil.
Patrícia PalmeiraLaboratory of Clinical Investigation LIM-36, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HC-FMUSP), São Paulo, Brazil.
Marcelo Biscegli JatenePediatric Cardiovascular Surgery Department, Heart Institute, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HC-FMUSP), São Paulo, Brazil.
Mayra de Barros DornaChildren's Hospital, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HC-FMUSP), São Paulo, Brazil.
Magda Carneiro-SampaioChildren's Hospital, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HC-FMUSP), São Paulo, Brazil.
Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo · BR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background and Aims: Congenital heart diseases (CHDs) are diagnosed in approximately 9 in 1,000 newborns, and early cardiac corrective surgery often requires partial or complete thymectomy. As the long-term effect of early thymectomy on the subsequent development of the immune system in humans has not been completely elucidated, the present study aimed to evaluate the effects of thymus removal on the functional capacity of the immune system after different periods. Methods: A systematic review of the literature was performed using MEDLINE, EMBASE, LILACS and Scopus. The inclusion criteria were original studies that analyzed any component of the immune system in patients with CHD who had undergone thymectomy during cardiac surgery in the first years of life. The results were evaluated for the quality of evidence. Results: Twenty-three studies were selected and showed that patients who underwent a thymectomy in the first years of life tended to exhibit important alterations in the T cell compartment, such as fewer total T cells, CD4+, CD8+, naïve and CD31+ T cells, lower TRECs, decreased diversity of the TCR repertoire and higher peripheral proliferation (increased Ki-67 expression) than controls. However, the numbers of memory T cells and Treg cells differed across the selected studies. Conclusions: Early thymectomy, either partial or complete, may be associated with a reduction in many T cell subpopulations and TCR diversity, and these alterations may persist during long-term follow-up. Alternative solutions should be studied, either in the operative technique with partial preservation of the thymus or through the autograft of fragments of the gland. Systematic Review Registration: Prospero [157188].

Indexed as

Child DevelopmentAge FactorsAntigenic VariationCell ProliferationChildChild, PreschoolHumansImmune SystemImmunologic MemoryInfantInfant, NewbornPhenotypeReceptors, Antigen, T-CellThymectomyThymus GlandT-Lymphocyte SubsetsReceptors, Antigen, T-Cellcongenital heart defectimmunosenescencelymphocytopeniaT cell receptor repertoirethymectomythymusT lymphocyteTRECs

Identifiers

PMID34899730
PMCPMC8656688
OpenAlexW3217741084

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.