Does anyone know why they renamed the Cancer Man the Cigarette Smoking
Man? Did someone put pressure on the producers to make the change?

I don’t think it was ever changed. “Cancer Man” was Mulder’s name for him. The
official name, as far as I know, has always been Cigarette Smoking Man.

I heard that the tobacco companies had big big problems with ‘Cancer’ Man,
so to aviod complications, they started calling him CSM.

Lets put it this way, even Mulder refers to him as the Cigarette Smoking
Man now. Nobody on the show uses the title Cancer Man anymore.
Is it possible Big Tobacco paid someone a visit?

In the earliest scripts, he’s ID’d as Cigarette Smoking Man, or CSM
for short (and for his dialogue headers). Mulder occasionally refered
to him as Cancer Man, and even Black-Lunged SonofaBitch, but these were
more terms of endearment than actual names.

By the way, in Sleepless, Deep Throat’s replaceent (X?) was originally
written as a woman.