Bruce Willis has frontotemporal dementia - what is it?

Oct 5

2 min read

Actor Bruce Willis has been diagnosed with frontotemporal dementia, a group of brain disorders caused by progressive nerve cell loss in the brain.

The 67-year-old was previously diagnosed with aphasia - which causes difficulties with speech - but this has progressed, and he has been given a more specific diagnosis, his family said.

What is frontotemporal dementia?

Frontotemporal dementia (FTD) is a disease. It is caused by the progressive loss of nerve cells in the brain's frontal and temporal lobes. As those areas shrink it can lead to changes in a person's personality, behavior and language.

This is not quite the same as "dementia", which is a general term that describes the symptoms of a large number of different brain diseases, including Alzheimer's.

FTD is unusual as it largely affects people in mid-life, between the ages of 45 and 65 - most other forms are found in older ages. There are different types of FTD, but estimates suggest between 50,000 and 60,000 have some form of the disease in the US, according to the Alzheimer's Association.

What are the symptoms?

Symptoms include personality and behavior changes and problems with language and mental focus.

Those can include inappropriate social behavior, lack of judgement and being easily distracted, as well as motor problems such as muscle weakness and tremors.

Because FTD affects people's personalities and behaviors, the disorder can be misdiagnosed as a psychiatric issue, according to the Mayo Clinic.

There is no cure or way to slow down the disease, although there are treatments for some of the symptoms. As the disease progresses, patients eventually need full-time care. On average, people live eight to 10 years after diagnosis, but some people live much longer.