Josh Vintner-Jackson was diagnosed with stage 3 colon cancer at 29 years old. Josh Vintner-Jackson Josh Vintner-Jackson was 29 when he first felt discomfort in his left hip. Doctors thought he was constipated, but he was eventually diagnosed with colon cancer. Young cancer cases are rising but a significant number are diagnosed late. Josh Vintner-Jackson first felt some discomfort in his lower left hip in March 2020. At the time, Vintner-Jackson, who is from the UK, was 29 and worked at a startup in Austin. He balanced his time between work, hanging out with friends, and his active hobbies. He loved running marathons, including one five-day ultramarathon through the desert in Jordan. Over the next four months, he would occasionally feel a pang of discomfort in the area. By the end of May, he had started to become severely constipated, despite eating what he considered a healthy diet . After not pooping for eight days, he went to urgent care in June 2020, where an X-ray revealed a buildup in his colon .…