by Dyani Lewis
Ron Walker has never been one to shy from a challenge. But at 72, the former lord mayor of Melbourne was thrown a curveball. A pea-sized lump on his forehead turned out to be a melanoma.
Once removed, and with the lymph nodes showing all clear, his surgeon was optimistic. Within a year tumours blossomed in his lungs, bones and brain.
Walker was given a few months to live. In a last-ditch attempt, he travelled to Los Angeles to enrol in a trial of a new drug, Keytruda. Every three weeks, Walker watched drug-laced fluid drain from the drip into his arm. After just four treatments, his tumours began shrinking. A year and a half later, his cancer was nowhere to be seen.