From the PSP Association website it does seem to be a condition ’diagnosed’ by excluding other diagnoses and can only be confirmed by post mortem. But he has been rushed to hospital ill according to Sally in tv interviews and must have consulted doctors and his GP over the years. Plus he was heavily involved with the charity. If his progression wasn’t as expected, they would have seen enough medical people to have had someone say ‘I don’t think this is CBD’. Yet still they carried on saying it was for another 7 years after the book was published and 12 years from his ‘diagnosis’. Because it was financially in their interests to keep pretending he had a terminal condition.
“The diagnosis of CBD is complicated because its symptoms can closely resemble those of other neurological conditions. For example, the motor symptoms of CBD, such as stiffness and tremors, may be mistaken for Parkinson’s Disease, while its cognitive impairments might suggest Alzheimer’s Disease or Frontotemporal Dementia. Additionally, the rare and variable nature of CBD means that it may not be the first condition considered by healthcare professionals, further complicating the diagnostic process.
Another challenge is the highly individual nature of how CBD develops; symptoms can differ significantly from one person to another, and the progression of the disease can vary widely. The wide range of symptoms that can develop means that currently, there is no single test that can definitively diagnose CBD. Instead, the diagnosis is often made through a combination of clinical evaluation, neuroimaging, and the exclusion of other conditions. A definite diagnosis of CBD can only be made post-mortem.”