A young banking graduate and a seasoned health professional had almost nothing in common — until both received a diagnosis that would change their lives forever. Their stories reveal a troubling pattern around sarcoma, one of Australia's deadliest and least recognised cancers, where vague symptoms and a low index of suspicion can delay life-saving treatment by months or even years.

Symptoms dismissed as everyday ailments

Sam Mathias was 22, wrapping up his university degree, training in boxing and preparing to launch a banking career when he began noticing what he described as "little niggles" — a sore shoulder and unusual sensations in his lungs. Fit, young and self-described as an optimist, he never considered cancer as a possibility.

"To be honest with you, I didn't," Mr Mathias said when asked whether cancer had crossed his mind. "I think it was maybe just being a young fit man otherwise."

For chiropractor and occupational health researcher Angela de Weger, the first clue felt like warm water running down her leg. Balancing full-time work, a research degree and raising a five-year-old son, she was told by doctors that stress could explain her symptoms. It was an explanation she was willing to accept.

"I didn't want to believe that it was anything more than that," she said.

Months later, both were diagnosed with sarcoma — a rare group of cancers that can develop in bone, cartilage or soft tissue virtually anywhere in the body, making it among the hardest cancers to detect in Australia.

A cancer that receives less than one per cent of research funding

One in three Australians diagnosed with sarcoma will not survive beyond five years, yet the disease attracts less than one per cent of the country's total cancer research funding. It accounts for roughly one in five cancers diagnosed in adolescents and young adults — a population whose symptoms are frequently attributed to sport or growth.

Medical oncologist Dr Vivek Bhadri says the challenge lies in the absence of a clear diagnostic red flag.

"There's no one specific symptom," he explained. "Oftentimes people will have non-specific symptoms."

Young people with persistent knee pain are commonly assumed to have sporting injuries or growing pains, while painless lumps may be easily overlooked. Dr Bhadri notes it is often only after several weeks without improvement that patients or clinicians begin to suspect something more serious.

Delays with serious consequences

For Mr Mathias, roughly a year passed before an enlarged lymph node in his neck finally prompted further investigation. Even then, the path to diagnosis was obstructed: a clinic turned him away for a planned biopsy because he presented as too young and too healthy. It was only after severe chest pain led to an urgent X-ray that he was admitted to hospital.

Because his cancer presented so unusually, specialists spent a further 10 to 12 weeks analysing tissue samples — ultimately sending them to an expert in Boston to confirm the diagnosis. By that point, the cancer had already spread to his lungs, neck lymph nodes and bones. He later credited a person close to him for pushing him to seek help earlier, acknowledging he likely would not have done so on his own.

Ms de Weger's diagnosis came after two years of intermittent symptoms culminated in what she believed was a stroke at her desk. A nine-hour operation revealed a rare grade-three brain sarcoma. Despite more than 35 years working in the health sector, she said she had never imagined it could happen to her.

"I thought, 'I'm healthy, I live a good healthy life'," she said.

Why early awareness matters

Both cases underline a consistent message from clinicians and survivors alike: persistent or unexplained symptoms should not be self-dismissed, regardless of a person's age or general fitness. With sarcoma capable of developing in almost any tissue in the body and its symptoms frequently mirroring more benign conditions, awareness remains one of the most powerful tools available before a formal diagnosis can be made.

Advocates continue to push for greater funding and faster diagnostic pathways for a cancer that, despite its severity, remains largely unknown to the general public.