Caitlin Leggett, a 24-year-old woman from Cardiff, Wales, passed away after a battle with acute myeloid leukaemia (AML), an aggressive form of blood cancer affecting white blood cells. Her case drew public attention after her family shared updates about her diagnosis, treatment journey, and fundraising efforts for advanced medical care abroad. She was initially given a limited life expectancy following a relapse of her illness. According to reports shared by her family and covered by UK media outlets.
Caitlin was first diagnosed with acute myeloid leukaemia in April 2025. She underwent chemotherapy treatment and initially entered remission, offering hope to her family and medical team. However, the disease later returned, and doctors informed the family that available treatment options in the UK were unlikely to provide a cure at that stage.
Following the relapse, Caitlin’s family began exploring treatment options outside the United Kingdom. A fundraising campaign was launched to support the cost of a potential stem cell transplant overseas. The GoFundMe campaign, organized by her sister Grace, highlighted the urgency of her condition and the family’s effort to seek additional treatment options in other countries.
In her fundraising message, Grace described the emotional difficulty of the situation and the close bond she shared with her sister. She explained that they had recently celebrated their 24th birthday together and emphasized the urgency of accessing treatment. The appeal aimed to raise awareness and financial support for experimental or alternative medical procedures that were not readily available within the UK system.
During the medical process, it was reported that Caitlin’s sister Grace was evaluated as a potential stem cell donor. At that stage, doctors discovered that the twins shared identical genetic markers, confirming that they were identical twins rather than fraternal twins as previously believed. This medical finding added complexity to the treatment options available.
Medical reports explained that identical genetic profiles can sometimes affect donor compatibility assessments in stem cell procedures. As a result, Grace was ultimately not used as a donor for the transplant process. This development was described by the family as both emotionally and medically challenging during an already difficult period.
Despite treatment efforts, Caitlin’s condition continued to decline after her relapse. According to updates shared by her family, she later experienced serious complications, including a sudden brain bleed and multiple strokes, which led to a rapid deterioration in her health. These complications occurred shortly before her passing.
Her sister Grace announced Caitlin’s death through a message shared on the family’s GoFundMe page on June 16, confirming that she had passed away the previous day. In the statement, the family expressed gratitude for the support they had received throughout Caitlin’s illness and asked for privacy as they grieved.
The announcement described Caitlin’s final moments as peaceful and surrounded by her loved ones. The family also reflected on the emotional impact of her loss and the journey they had experienced together through her illness and treatment attempts. Messages of condolence were shared by supporters who followed her story online.
Caitlin and Grace were known to share a very close relationship, having grown up together and remained strong companions into adulthood. According to interviews and public statements, their bond played an important role in how they navigated Caitlin’s illness and treatment process. The discovery of their identical twin status during medical testing added a deeply emotional layer to their story.
Following the news of her passing, many people expressed sympathy and support for the family across social media platforms and fundraising pages. Tributes highlighted Caitlin’s strength during her illness and the emotional impact her story had on those who followed it.
Her family continues to receive messages of support as they cope with the loss. Donations made through the fundraising campaign have been directed toward medical expenses and related support efforts during her treatment period.
Caitlin Leggett is remembered by her family and loved ones as a young woman who faced her illness with courage and determination. Her story has resonated with many people due to the emotional nature of her journey and the close bond she shared with her sister.
