Please help to accelerate brain cancer research
In September 2024, Mark was diagnosed with Stage IV Glioblastoma. He underwent a successful surgical resection, several rounds of chemotherapy and radiotherapy. Surgery and treatment provided positive results, with Mark nearly back to feeling his normal, bubbly self. Potting around the house and shed, endless jokes and puns, drinking his favourite reds and listening to music - all whilst spending time with those he loved most.
In August 2025, Mark experienced a bowel obstruction and during this recovery, it was confirmed the glioblastoma had returned.
Despite his hard fought and valiant battle, Mark passed away on 25 January 2026.
A son, loving husband, father, father-in-law, Grandad/Pupu and friend to many - he was loved and cherished by all who knew him.
The Gehlken family has appreciated everyone' support during this time and requests that any floral tributes be replaced with donations to Brain Cancer Australia.
Brain cancer remains one of the most devastating cancers and is one of the most under researched of all the cancer groups. We desperately need major breakthroughs in brain cancer research, and any donations will help drive brain cancer research forward.
All money raised goes to Brain Cancer Australia.
All donations over $2 are tax deductible and a receipt will be emailed to you.
RIP Mark. Much love to Sally and Family. XXX