Hoppus said on Twitter that he's receiving treatment but didn't reveal the type of cancer he has.

Tom DeLonge, the band's co-founder, said he was aware of Hoppus' cancer diagnosis and offered his support.

"And to add to his own words that he used today, I would also like to say that he is strong, and a super-human who is pushing through this difficult obstacle with a wide-open heart," DeLonge said in a tweet.

The rock band Blink-182 was formed in 1992, attaining commercial success in 1999 with the album "Enema of the State." Its last album, "NINE," was released in 2019.