Fignon "the professor" on doping...

Fignon on doping,

copied excerpt--

In the book, Fignon admitted to doping, describing drug-taking in the
1980s as widespread. He said it was recreational rather than
performance-enhancing -- aided by the strong Colombian involvement in
cycling at the time and accompanied by large quantities of cocaine.

He said doping in cycling was revolutionized by the arrival of the
blood-booster EPO in the early '90s. Fignon said he refused to take it
and retired from competition in 1993 when he realized that mediocre
riders were now keeping up with him.
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Did "the Professor" get colon cancer from the cocaine the Columbians
gave him?
Was Lance one of those mediocre riders he was referring to?