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Related Experiment Video

Updated: Jan 7, 2026

A Metadata Extraction Approach for Clinical Case Reports to Enable Advanced Understanding of Biomedical Concepts
07:50

A Metadata Extraction Approach for Clinical Case Reports to Enable Advanced Understanding of Biomedical Concepts

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Clinical Manifestations.

Diego Bustamante-Paytan1, José Carlos Huilca2, Gregory Brown3

  • 1Unidad de Investigación de Deterioro Cognitivo y Prevención de Demencia, Instituto Peruano de Neurociencias, Lima, Lima, Peru.

Alzheimer'S & Dementia : the Journal of the Alzheimer'S Association
|December 25, 2025
PubMed
Summary
This summary is machine-generated.

Primary progressive aphasias (PPA) show overlapping symptoms, challenging diagnosis. This study found significant symptom overlap across semantic, nonfluent, and logopenic PPA variants, highlighting the need for refined diagnostic criteria.

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Area of Science:

  • Neurology
  • Linguistics
  • Neuroscience

Background:

  • Primary progressive aphasias (PPA) involve progressive language decline.
  • Current PPA variant classification (semantic, nonfluent, logopenic) faces diagnostic challenges due to overlapping symptoms.

Purpose of the Study:

  • To analyze the presence and overlap of specific symptoms across different primary progressive aphasia variants.
  • To evaluate diagnostic challenges in PPA variant identification.

Main Methods:

  • A retrospective study of 22 PPA patients (50-80 years) diagnosed per Gorno-Tempini et al. (2011) criteria.
  • Comprehensive neuropsychological assessment and MRI were used for diagnosis.
  • Descriptive statistics compared symptom distribution among semantic (svPPA), nonfluent (nfvPPA), and logopenic (lvPPA) variants.

Main Results:

  • High word-retrieval difficulties observed in 77.8% of svPPA and nfvPPA patients.
  • Over half of logopenic PPA patients exhibited symptoms aligning with nonfluent PPA criteria.
  • Bilingualism was common in nfvPPA; indigenous language speakers were rare across variants.

Conclusions:

  • Significant symptom overlap exists among primary progressive aphasia variants.
  • More accurate diagnostic criteria are needed, especially in linguistically diverse regions like Latin America.