What is aphasia? Bruce Willis withdrew from the event after the diagnosis
Willis' family said he had recently been "diagnosed with aphasia that affected his ability to think.
Bruce Willis's decision to end his acting career was more than four decades.
After the recent diagnosis of aphasia is one of the reasons for the relatively rare disease.
Aphasia is a neurological condition that affects a person's ability To communicate orally or in writing.
It is estimated that it affects 2 million people in the United States
Affects almost 180,000 each year, according to the National Aphasia Association.
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