Landon was diagnosed with pancreatic and liver cancer in April of 1991. At that time, only 3% of pancreatic cancer patients and 5% of liver cancer patients lived for five years beyond their diagnosis. According to the Associated Press, Landon vowed to "fight like Hell," but "wasn't afraid to die." Unfortunately for Landon and his family, he did not live long after his cancer was discovered.
Landon passed away in Malibu, California on July 1, less than three months after receiving his initial diagnosis. He was only 54 years old (via the Los Angeles Times). He left behind a legacy that included being on the cover of TV Guide 22 times (a feat only surpassed by Lucille Ball), starring roles in three hit television shows, and numerous film credits. Even in the year of his untimely death, Landon was working on yet another project that might have proved to be just as successful as his previous small-screen endeavors.
Landon's last role was in the TV movie "Us" that aired in 1991. It was to be the pilot episode of a new television series, but Landon's untimely death resulted in the project being halted (via IMDb).
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