Queen Elizabeth II's official cause of death, as recorded on her death certificate, is listed as "old age." This term generally reflects a decline in the functions of the body due to aging rather than a specific illness. She died peacefully at Balmoral Castle in Scotland on September 8, 2022, at the age of 96. However, there have been reports and claims from several sources, including former UK Prime Minister Boris Johnson and royal biographer Gyles Brandreth, that the Queen was diagnosed with bone cancer (specifically a rare form of bone marrow cancer called multiple myeloma) in the years leading up to her death. These reports suggest that she battled this illness alongside the natural effects of aging. In addition, another account from a relative mentioned that Queen Elizabeth II suffered a stroke shortly before her death. Despite these disclosures, the official record remains "old age," indicating natural causes related to aging rather than a single definitive medical condition. Thus, while the official cause remains old age, she may have had underlying health issues including bone cancer and possibly a stroke that contributed to her overall health decline in her final years. The royal family has maintained a level of privacy around her detailed medical records.