Evidence map›Paper›PMID 30935398›Full record

SynthesisAlzheimer's research & therapy2019

Phenocopy syndrome of behavioral variant frontotemporal dementia: a systematic review.

Elizabeth Sakamoto Valente, Paulo Caramelli, Leandro Boson Gambogi, Luciano Inácio Mariano, Henrique Cerqueira Guimarães, Antônio Lúcio Teixeira, Leonardo Cruz de Souza

Abstract readSystematic Review
In one paragraph

Synthesis in Alzheimer's research & therapy, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
–field-weighted citation impact
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

21 citing papers in PubMed.

  1. Review
  2. Article
  3. Review
  4. Article
  5. Article
  6. Review
  7. Review
  8. Frontotemporal lobar degeneration.Nature reviews. Disease primers · 2023
    Review
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Plasma NfL levels and longitudinal change rates inJournal of neurology, neurosurgery, and psychiatry · 2021
    Article
  15. Fluid Biomarkers of Frontotemporal Lobar Degeneration.Advances in experimental medicine and biology · 2021
    Article
  16. Article
  17. Review
  18. Review
  19. Review
  20. 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

7 authors.

Elizabeth Sakamoto ValentePrograma de Pós-Graduação em Neurociências, Universidade Federal de Minas Gerais (UFMG), Instituto de Ciências Biológicas (sala 100, Bloco M1), Avenida Presidente Antônio Carlos, 6627 - Pampulha, Belo Horizonte, MG, 31270-010, Brazil.
Paulo CaramelliPrograma de Pós-Graduação em Neurociências, Universidade Federal de Minas Gerais (UFMG), Instituto de Ciências Biológicas (sala 100, Bloco M1), Avenida Presidente Antônio Carlos, 6627 - Pampulha, Belo Horizonte, MG, 31270-010, Brazil.
Leandro Boson GambogiPrograma de Pós-Graduação em Neurociências, Universidade Federal de Minas Gerais (UFMG), Instituto de Ciências Biológicas (sala 100, Bloco M1), Avenida Presidente Antônio Carlos, 6627 - Pampulha, Belo Horizonte, MG, 31270-010, Brazil.
Luciano Inácio MarianoPrograma de Pós-Graduação em Neurociências, Universidade Federal de Minas Gerais (UFMG), Instituto de Ciências Biológicas (sala 100, Bloco M1), Avenida Presidente Antônio Carlos, 6627 - Pampulha, Belo Horizonte, MG, 31270-010, Brazil.
Henrique Cerqueira GuimarãesPrograma de Pós-Graduação em Neurociências, Universidade Federal de Minas Gerais (UFMG), Instituto de Ciências Biológicas (sala 100, Bloco M1), Avenida Presidente Antônio Carlos, 6627 - Pampulha, Belo Horizonte, MG, 31270-010, Brazil.
Antônio Lúcio TeixeiraNeuropsychiatry Program, Department of Psychiatry and Behavioral Sciences, McGovern Medical School, The University of Texas Health Science Center at Houston (UTHealth), 1941 East Road, Houston, TX, 77054, USA.
Leonardo Cruz de SouzaPrograma de Pós-Graduação em Neurociências, Universidade Federal de Minas Gerais (UFMG), Instituto de Ciências Biológicas (sala 100, Bloco M1), Avenida Presidente Antônio Carlos, 6627 - Pampulha, Belo Horizonte, MG, 31270-010, Brazil. leocruzsouza@hotmail.com.ORCID 0000-0001-5027-9722

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe phenocopy syndrome of behavioral variant of frontotemporal dementia (phFTD) refers to patients presenting with neuropsychiatric symptoms mimicking the behavioral variant frontotemporal dementia (bvFTD), but lacking frontotemporal atrophy/hypometabolism on neuroimaging and not evolving to dementia during the follow-up. It is important to recognize phFTD for clinical and research purposes.

objectiveThe aim of this study was to perform a systematic review of the available literature on phFTD taking into account its clinical, cognitive, imaging, genetic, and pathological features. METHODS AND

resultsWe searched for the following terms in two electronic databases (PubMed and Scopus): "frontotemporal dementia and slowly progressive," "frontotemporal dementia and phenocopy," "frontotemporal dementia and non-progressive," "frontotemporal dementia and benign progression," and "frontotemporal dementia and benign." We did not include review articles. Papers had to be written in English, French, Portuguese, or Spanish. Overall, 235 studies were retrieved in the initial search. A total of 31 studies composed the final selection, comprising 292 patients. Patients with phFTD are predominantly male and have no major cognitive deficits, with globally preserved executive functions and episodic memory. Some cases (n = 7) of slowly progressive FTD have been associated with C9orf72 genetic expansion. There are only four reports of phFTD neuropathological data, with two patients with no neurodegenerative findings and two with frontotemporal lobar degeneration with ubiquitin-positive inclusions.

conclusionThe neurobiological underpinnings of phFTD remain unknown. It is controversial whether phFTD belongs to the FTD spectrum. Studies with biomarkers and pathological data are needed to solve the phFTD conundrum.

Indexed as

Frontotemporal DementiaBrainC9orf72 ProteinDisease ProgressionHumansPhenotypeC9orf72 ProteinC9orf72 protein, humanC9orf72Frontotemporal dementiaPhenocopy

Identifiers

PMID30935398
PMCPMC6444822

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Registered trials

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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.