Decades ago I lost a friend to that disease at only 47. He had a young wife and daughter. It's a difficult cancer to attribute to a cause, but in this case, my prime suspect was the building where he worked that had much earlier been used as a radiation laboratory. The suspicion there arises from the death of another of his colleagues who worked in the same building, who I also knew, who died of the disease at about 57.
These were not "young people" as we use the term, but they were decades early loses according to the life expectancy of that time. The younger man had been in the Marine Corps, and the older one had been a paratrooper in the Army at the Battle of the Bulge, and had also authored a popular novel that had been made into a film with George C. Scott -- "The Flim Flam Man" by Guy Owen.