Primary Progressive Aphasias: Diagnosis and Treatment.

Area of Science:

• Neurology
• Neuroscience
• Linguistics

Background:

• Primary Progressive Aphasias (PPAs) are rare neurodegenerative disorders within frontotemporal lobar degeneration (FTLD).
• They typically manifest between 45-70 years, with limited epidemiological data globally.
• PPA accounts for an estimated 0.5-2.5% of neurodegenerative cases in Memory Clinics.

Purpose of the Study:

• To provide clinicians with an overview of PPA epidemiology, clinical features, and classification.
• To enhance understanding of PPA subtypes and differentiate them from conditions like vascular aphasia.
• To inform clinical practice and highlight areas for future research.

Main Methods:

• A narrative review approach was employed.
• Literature search conducted using PubMed and Scopus databases.
• Relevant studies on PPA epidemiology, clinical presentation, and classification were synthesized.

Main Results:

• PPA incidence is approximately 1 per 100,000, with an average survival of 8 years.
• Key subtypes include non-fluent (nfPPA, lPPA), fluent (PFA, SD), and mixed (PMA) forms.
• Common symptoms include word-finding difficulties and, in semantic dementia, personality changes.

Conclusions:

• PPA is a heterogeneous neurodegenerative disorder with significant clinical variability.
• Limited epidemiological data necessitates further research for better disease understanding.
• Refining diagnostic and therapeutic approaches requires continued investigation and systematic reviews.