John Blackman

The 74-year-old, who voiced puppet Dickie Knee on the hit variety show, was diagnosed with bone cancer a month ago.

He returned home from hospital on Saturday and wore a 'Fight MND' beanie in support of footy legend Neale Daniher, who was diagnosed with the incurable disease in 2013. Life without doing that is just so alien to me. They were very confident of success.' 'The cancer-infected bone has gone and been replaced with a titanium mesh cover; a skin graft has replaced all of the skin on top of my head; and brain biopsies taken during surgery are clear,' he continued. 'Following PET and CAT Scans and a radioactive MRI, my plastic surgeon, Frank, consulted with my neurosurgeon, Patrick, and together they devised a plan of attack. 'Four weeks ago, I was diagnosed with a very unexpected bone cancer on the top of my noggin and the possibility of brain cancer beneath (yes, I actually do have a brain),' the TV personality wrote on Facebook.