A mother initially mistook her bloated abdomen for constipation, only to later discover she had a rare and incurable form of cancer. Chelsea Gallimore, aged 33, was urgently hospitalized when she woke up in excruciating pain and struggled to move for six hours. Prior to this, she had been dealing with stomach discomfort, night sweats, and fatigue, which she attributed to constipation.
Subsequent scans revealed an eight-centimeter mass on her bowel, and a biopsy confirmed she had a gastrointestinal stromal tumor (GIST), a rare cancer affecting about 900 individuals annually in the UK. Typically diagnosed in individuals aged 55 to 65, Chelsea’s diagnosis at 31 was notably atypical. Recounting her experience, Chelsea, from Prescot, Merseyside, expressed shock at the sudden diagnosis and the surreal feeling of facing a life-altering illness.
Following the discovery, Chelsea underwent surgery in March 2024 and commenced treatment with imatinib, a targeted drug that inhibits cancer cell growth. Discontinuing the medication in June 2025 after stable scans in October, she was alarmed to learn of the cancer’s return after an emergency CT scan on New Year’s Eve. Subsequent scans showed significant progression and metastasis, leading to the devastating news of the disease being incurable and inoperable.
Currently, Chelsea is undergoing treatment aimed at extending her life, albeit with uncertain duration. She grapples with chronic pain, relying on high doses of pain relief and receiving care from the palliative team. Chelsea, who has an 11-year-old son named Milo with her partner Andrew Mason, emphasized the emotional toll the diagnosis has taken on her family.
Scheduled for scans every three months to monitor treatment efficacy, Chelsea reflects on the heartbreak of living with an incurable illness at a young age. Despite the challenges, she is planning to marry Andrew in November, a decision made during her hospice stay to cherish moments with loved ones. Chelsea advocates for raising awareness of GIST through her social media journey, stressing the importance of seeking medical attention for unusual symptoms.
According to Cancer Research UK, early-stage GIST may present no symptoms, leading to late-stage diagnosis. Symptoms include abdominal pain, bloating, nausea, and fatigue. GIST, a rare sarcoma primarily affecting the digestive system’s wall, demands vigilance in symptom monitoring, especially for those experiencing persistent constipation.
Chelsea’s story has resonated in Parliament, prompting discussions that led to the enactment of the Rare Cancers Act. She highlights the need for increased awareness of GIST symptoms due to its rarity and often asymptomatic nature.
