Despite ongoing immunotherapy, the 45-year-old says she is now “in a good place” before the Wheelchair Curling World Championships which start in Stevenston, North Ayrshire, on Saturday.
Training with the rest of the Scotland squad in Stirling throughout her treatment was key for the Yorkshire-born athlete, whose ultimate aim is to become the first Briton to win gold at both a summer and winter Paralympics.
“Being able to come to the training centre once a week gave me something to focus on other than cancer,” she says.
“Here I was ‘Jo the athlete’. We could take the mickey out of each other like we always do, we could shoot some stones and forget about what was going on in the background.”
This week’s Worlds are the final chance for Butterfield’s Scotland team to gain qualification points before next year’s Winter Paralympics.
She will team up with Sochi bronze medallist Gregor Ewan and fellow Paralympians Hugh Nibloe and Gary Smith, as well as debutant Austin McKenzie, while England will be led by Stewart Pimblett along with Karen Aspey, Julian Mattison and Jason Kean.
They will be joined by Canada, China, Italy, Japan, Korea, Latvia, Norway, Slovakia, Sweden and the United States with the round-robin games going on until 6 March – a year to the day before the opening ceremony of the 2026 Winter Paralympics in Italy – before play-offs and semi-finals on 7 March and the final on 8 March.
The team event, which will make its Paralympic debut in Milan-Cortina next year, will be followed by the mixed doubles from 11-16 March.
Scotland are in a good position to qualify for the Games in the team event but the mixed doubles team of Nibloe and Charlotte McKenna will need a strong performance to secure a place for next year.
For Butterfield, going to a World Championships again “almost feels like a gold medal” but her Paralympic dream remains alive.
“There has been a speed bump and it has derailed things, but winning gold in Italy is still the ultimate aim,” she says.
“I am working hard every day to make it happen and we are coming together as a team really well.
“I feel good and I feel strong. My strength is coming back every day and I feel healthy.
“I feel hugely fortunate to be sitting here because I had an eye-opener that this might not be possible.
“I want to cherish and enjoy it and make the most of it.”