Bruce Willis has been diagnosed with frontotemporal dementia (often shortened to FTD), a rarer form of dementia that typically affects behavior, personality, and language rather than just memory.

What type exactly?

Public reports from his family and medical explainers state that Bruce Willis is living with frontotemporal dementia, and that his earlier aphasia diagnosis is part of how the condition first showed up.

Doctors and dementia experts commenting on his case have noted that his symptoms are consistent with a subtype of FTD called primary progressive aphasia, which mainly affects speech and language.

Quick breakdown of FTD

  • Frontotemporal dementia is caused by damage to the brain’s frontal and temporal lobes, which control behavior, decision-making, emotions, and language.
  • Compared with Alzheimer’s, FTD often appears earlier in life (frequently before age 65) and shows more prominent behavior or language changes at the start.
  • In Bruce Willis’ case, language problems (aphasia) were publicly shared before the full FTD diagnosis, which fits how some FTD subtypes typically progress.

Simple table of his diagnosis

[9][1][5] [1][2][3] [3][5][1]
Aspect Details
Main condition Frontotemporal dementia (FTD), a degenerative brain disease affecting frontal and temporal lobes.
Key early symptom Aphasia (language and communication difficulties) reported in 2022.
Likely FTD subtype Primary progressive aphasia–type FTD suggested by experts discussing his case.
Information gathered from public news and health explainers about Bruce Willis’ condition and general dementia education resources.