The user, CappnPoopdeeck, posted the comic to explain how his male friend had jokingly used his girlfriend’s pregnancy test to find that it came out positive.
The comic went viral and had 1,500 comments, several of which warned that it could be a sign of testicular cancer.
“If this is true, you should check yourself for testicular cancer. Seriously, Google it,” said one comment.
Turns out, a doctor at the University of Texas confirmed the link, as the body produces high levels of human chorionic gonadotrophin in times of pregnancy and when certain cancerous tumors appear. A pregnancy test can detect the hormone.
News reports say that the user’s friend subsequently was admitted to hospital where doctors confirmed the existence of a tumor in the early stage of cancer. The testicle was then removed.