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Primary progressive aphasia presenting as conduction aphasia.

K Hachisuka1, M Uchida, Y Nozaki

  • 1Department of Rehabilitation Medicine, University of Occupational and Environmental Health Japan, 1-1 Iseigaoka, Yahatanishi, Kitakyushu, Japan. kenhachi@med.uoeh-u.ac.jp

Journal of the Neurological Sciences
|October 16, 1999
PubMed
Summary

This study details a unique case of primary progressive aphasia (PPA) presenting as conduction aphasia. The patient maintained daily activities and cognition for years, highlighting a distinct PPA subtype.

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Area of Science:

  • Neuroscience
  • Neurology
  • Linguistics

Background:

  • Primary progressive aphasia (PPA) is a neurodegenerative disorder affecting language abilities.
  • Conduction aphasia is characterized by difficulties in repeating words and phrases with relatively preserved comprehension.

Observation:

  • A 60-year-old Japanese female presented with progressive difficulty in word and phrase repetition (conduction aphasia).
  • The patient exhibited phonemic paraphasias but maintained intact comprehension and cognitive/behavioral functions for over six years.
  • She successfully continued work and daily activities throughout the disease progression.

Findings:

  • Neuroimaging revealed minor left hemisphere abnormalities (dilated left inferior horn, sulcal widening).
  • Positron emission tomography showed mild hypometabolism in the left supramarginal gyrus and adjacent regions.

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  • Diagnosis was PPA with a prominent conduction aphasia presentation.

    • Implications:

    • This case suggests a fluent form of PPA specifically presenting as progressive conduction aphasia.
    • Preserved memory, cognition, and functional capacity may characterize this PPA subtype.
    • Further research into PPA variants is crucial for accurate diagnosis and management.