TikTok creator Sydney Towle has died aged 26 after living for nearly three years with stage-four cholangiocarcinoma, a rare cancer of the bile ducts. Towle, a Dartmouth graduate who lived in Los Angeles, shared her diagnosis, treatment and daily life with more than a million followers. She had been diagnosed at 23 after seeking medical help for abdominal symptoms. Her family announced her death, prompting tributes from followers and cancer advocates who praised her openness about living with serious illness as a young adult.