When 19-year-old Jac Sexton started experiencing dizziness and double vision, he did what most people would—he went to the doctor. What seemed like a minor health concern was initially dismissed as an ear infection. But as his symptoms worsened, it became clear that something far more serious was happening.
Just months later, Jac’s life took a devastating turn with a diagnosis no one saw coming. His story is a sobering reminder of how easily life can change and why awareness of serious illnesses like brain cancer is so important.
The Initial Symptoms and Misdiagnosis
In October 2024, Jac Sexton began experiencing unusual symptoms—severe headaches, dizziness, and double vision. His balance became increasingly unstable, and he struggled with slurred speech, making it appear as though he was intoxicated. Concerned, he visited a doctor, who diagnosed him with an ear infection, likely as a lingering effect of a recent case of glandular fever.
Despite being prescribed antibiotics, Jac’s symptoms did not improve. Instead, they worsened. When he returned to the doctor the following day, a second physician recognized the need for further examination and referred him for a CT scan—scheduled for two weeks later. However, time was not on Jac’s side. Before the appointment could take place, his condition deteriorated rapidly, prompting his mother to rush him to the emergency room at Prince Charles Hospital in Merthyr Tydfil.
That night, a CT scan finally revealed the truth: Jac had a large tumor pressing on his brainstem. What had been dismissed as an ear infection was, in reality, an aggressive and life-threatening form of brain cancer.
The Diagnosis That Turned a Teen’s Life Upside Down
When doctors at Prince Charles Hospital reviewed Jac’s CT scan, the results were devastating. He was diagnosed with glioblastoma, an aggressive and fast-growing brain tumor that is considered one of the deadliest forms of cancer. In Jac’s case, the tumor was located on the brainstem—a highly sensitive area that controls essential functions like breathing, movement, and swallowing. Due to its location, surgery was not an option, making treatment even more challenging.
Glioblastomas are known for their rapid progression and poor prognosis. According to the Brain Tumor Charity, the average survival time for patients is just 12 to 18 months, and only about 5% survive beyond five years. While these tumors are more commonly diagnosed in older adults, cases in younger individuals like Jac are rare, making his condition even more difficult to treat.
Despite the grim outlook, doctors believed that Jac’s youth and overall health gave him a fighting chance. He was referred to Velindre Cancer Hospital in Cardiff, where he met with oncologists to explore possible treatment options. The plan was aggressive—a six-week course of high-intensity radiotherapy in hopes of slowing the tumor’s growth.
A Grueling Fight Against One of the Deadliest Cancers
Determined to fight, Jac began his treatment in November 2024. He endured six weeks of intensive radiotherapy, attending sessions five days a week. The radiation aimed to slow the tumor’s progression, but the toll on his body was immense. By the time the treatment concluded just before Christmas, Jac had lost much of his mobility, struggled to swallow, and suffered from extreme fatigue.
The effects of the radiation were both physically and mentally exhausting. Jac’s left side became weaker, making it difficult for him to move or perform daily tasks. Eating became nearly impossible, and his body had little time to recover before an unforeseen medical crisis struck.
On January 4, 2025, Jac suffered a sudden and life-threatening aspiration incident—a condition in which food or liquid enters the lungs instead of the stomach, leading to choking and possible respiratory failure. He collapsed at home, unable to breathe, and had to be rushed to the hospital by air ambulance. His condition was critical, and doctors feared the worst.
The lack of oxygen could have caused severe brain damage or even heart failure, but against all odds, Jac made an astonishing recovery. Despite the trauma his body had endured—from the tumor itself to the intense radiation and near-fatal aspiration—his will to fight remained unshaken.
Early diagnosis can make a significant difference, even in cases of aggressive brain cancer. While glioblastoma remains one of the most challenging cancers to treat, catching it sooner may provide patients with more treatment options and a better chance of managing the disease. The tragic loss of this teenager is a reminder that when it comes to unexplained or persistent symptoms, it’s always better to ask more questions, seek a second opinion, and insist on thorough testing—because sometimes, what seems minor could be something far more serious.
Finding Strength in His Final Weeks
After enduring months of aggressive treatment and a near-fatal collapse, Jac returned home in early February to receive palliative care surrounded by his loved ones. Despite losing much of his mobility and the ability to speak, he remained the same spirited and determined person that his family and friends had always known.
His home became a place of warmth and support, filled with visits from those closest to him. His brother, cousins, and lifelong friends spent time by his side, sharing laughter and memories. His girlfriend, Abbey, remained a constant source of comfort. Even in his most challenging moments, Jac’s quick wit and humor never faded, earning him the affectionate nickname “Sassy Jac” from hospital staff who had cared for him.
The outpouring of support from the community was overwhelming. A GoFundMe campaign, initially set up to assist with his medical care, far exceeded its goal, raising over £13,000. Jac had expressed a desire to give back, and his family is now working to ensure his legacy continues by supporting brain cancer research and the organizations that helped him throughout his fight.
As his condition worsened, Jac found solace in being at home, surrounded by those who loved him most. His journey was marked by incredible resilience, strength, and an unbreakable spirit. On February 25, 2025, Jac passed away peacefully, leaving behind a lasting impact on everyone who knew him.
Raising Awareness About Brain Tumors and the Need for Early Detection
Jac’s story is a painful reminder of how easily serious illnesses can be mistaken for something minor. Brain tumors, especially aggressive ones like glioblastoma, often present symptoms that seem harmless at first—headaches, dizziness, or vision problems. Because these signs overlap with common conditions, many cases go undiagnosed until it’s too late.
Each year, around 3,000 people in the UK and 12,000 in the US are diagnosed with glioblastoma, yet survival rates remain low. Symptoms that persist or worsen over time should never be ignored, and seeking a second opinion can make all the difference. Medical experts stress the importance of early detection, but raising awareness is just as critical in ensuring more people recognize the warning signs.
While glioblastoma remains difficult to treat, researchers continue to explore new therapies that offer hope for the future. Families like Jac’s are speaking out to push for better awareness, research funding, and support for those facing this devastating disease. They hope that sharing his story will encourage others to trust their instincts, advocate for their health, and push for answers when something doesn’t feel right.l symptoms were dismissed. In hindsight, they wish they had pushed for more answers earlier.
Honoring Jac’s Legacy and the Fight for Awareness
Jac’s journey was marked by resilience, determination, and an unwavering spirit, even in the face of unimaginable challenges. Though his time was cut short, his story continues to make an impact, inspiring others to pay closer attention to their health and advocate for early detection of serious illnesses. His family and friends are committed to keeping his memory alive, not just through their love and remembrance but also by supporting brain cancer research and awareness efforts.
The overwhelming support Jac received from his community reflects the profound effect he had on those around him. From fundraising efforts to messages of encouragement, his story brought people together in a shared fight against a disease that remains one of the most difficult to treat. His loved ones hope that by sharing his experience, others will recognize the importance of trusting their instincts when it comes to their health and seeking medical attention when something doesn’t feel right.
While nothing can change the heartbreaking outcome, Jac’s legacy lives on in the people he touched and the awareness his story continues to spread. His strength, humor, and kindness will never be forgotten, and his family’s mission to raise awareness and support research ensures that his fight was not in vain.
Featured Image Source: Jac Sexton’s gofundme
