Irish middle-distance runner and two-time Olympian Ciara Mageean has died at the age of 34 after battling stage 4 bowel cancer. Her death, announced by her family on November 1, comes 16 months after she publicly revealed her diagnosis.Mageean represented Ireland at the 2016 Rio and 2020 Tokyo Olympic Games. She won the women's 1,500m gold at the 2024 European Athletics Championships in Rome, becoming only the second Irish athlete to win an individual European title.Her family announced her death in a statement on social media, saying, "At 6:30am this morning, Ciara lost her battle with cancer surrounded by her loved ones."The athlete had revealed her cancer diagnosis in July 2025. In a subsequent interview with Irish broadcaster RTÉ, she spoke about the symptoms she initially noticed but how she attributed them to digestive problems."I would get up in the morning and I would need the toilet four times. I thought, 'That's not normal,'" she said.She also described experiencing abdominal cramps and initially wondered whether something she had eaten had upset her stomach."I kept finding logical reasons for it, which many people would. I thought, 'Oh great, on top of everything else, I have an irritable bowel.'"Mageean said her partner, Thomas Moran, encouraged her to seek medical advice. Further investigations revealed that she had stage 4 bowel cancer, which had spread to her liver and lungs.Also read: India Cancer Drug Price Cuts: New Analysis Reveals 159 Out Of 643 Brands See No ReductionBowel Cancer Symptoms In Young AdultsBowel cancer, also called colorectal cancer, develops in the colon or rectum. Although the risk increases with age, younger adults can also develop the disease. According to the NHS, symptoms can include:Changes in bowel habits: Chronic diarrhoea, constipation, softer stools or needing to use the toilet more frequently than usual.Blood in stools: Blood may appear bright red or make stools look dark or black.Abdominal pain: Persistent stomach cramps, discomfort or bloating.Feeling that the bowel has not emptied completely: A continuing urge to pass stools even after using the toilet.Unexplained weight loss: Losing weight without changes in diet or physical activity.Constant fatigue: Feeling unusually tired or breathless, sometimes due to anaemia caused by blood loss. Also read: Colorectal Cancer Rates Rising in US Across Nearly All Age Groups After 20 Years of DeclineWhy Bowel Cancer Can Be Overlooked In Younger PeopleOne challenge in diagnosing bowel cancer in younger adults is that its symptoms can overlap with common digestive conditions like irritable bowel syndrome (IBS), haemorrhoids and inflammatory bowel disease.Changes in bowel habits, abdominal cramps and bloating may therefore be attributed to dietary changes, stress or gastrointestinal infections.However, unexplained symptoms should be assessed clinically. Rectal bleeding, ongoing changes in bowel habits, unexplained weight loss and fatigue should not automatically be attributed to benign digestive problems.A family history of colorectal cancer, particularly in a close relative diagnosed at a young age, can also increase a person's risk.Doctors may recommend blood tests to check for anaemia, stool tests such as the faecal immunochemical test (FIT), or further investigations including a colonoscopy, depending on the symptoms and clinical assessment.