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Read about Sir Terry Pratchett's dementia diagnosis of posterior cortical atrophy (PCA), a rare type of Alzheimer's disease.
Fantasy writer Terry Pratchett, creator of 'Discworld' series, dies from Alzheimer's
BBC - Alzheimers: Why Terry Pratchett feels good
Terry Pratchett's books read by millions across the world
Sir Terry Pratchett: Writing's as easy as ever but i can't tie my shoelaces, Express Yourself, Comment
Rude health: No sniffing matter
We Love You, Terry Pratchett
Bestselling author Terry Pratchett dies at age 66
Sir Terry Pratchett: A watershed moment for dementia - Alzheimer's Research UK
Sir Terry Pratchett and his rare Alzheimer's diagnosis
Terry Pratchett talks to other people with PCA
Sir Terry Pratchett obituary
Sir Terry Pratchett Dead: Legendary 'Discworld' Author Spoke Movingly Of Assisted Dying
About Sir Terry - Sir Terry Pratchett
Terry Pratchett docudrama reveals moment author realised he was 'dead', Terry Pratchett
Terry Pratchett: my case for a euthanasia tribunal, Assisted dying