Cancern

The concern for cancer. (Since everything apparently causes it these days)

"I drink so much Diet Coke, and they say it might be dangerous... I'm a little cancerned."

Cancern

A concern about a person or situation that is deemed to be cancerous.

Bro 1: I mean I guess we should've expected her to blame us for everything that happened at the party last Saturday night.
Bro 2: Yeah man, I guess her constant snitching wasn't really a cancern at the time...