Risk
There are no known environmental risk factors for the progressive aphasias. However, one observational study has recently suggested that vasectomy could be a risk factor for PPA in men. These results have yet to be replicated elsewhere.
PPA is not considered a hereditary disease. However, relatives of a person with any form of frontotemporal lobar degeneration, including PPA, are at slightly greater risk of developing PPA or another form of the condition.
Read more about this topic: Primary Progressive Aphasia
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