The music world was shocked recently when Blink-182 frontman Mark Hoppus revealed that he had been diagnosed with cancer.

The 49-year-old bassist told fans that he was undergoing treatment and still had months of treatment ahead of him, but was staying positive.

Now, he has given an update on his situation - saying that this week, he was undergoing some crucial tests.

"Apologies if I’m oversharing but it’s so surreal to think that this week I’ll take a test that may very well determine if I live or die," he wrote on Twitter, although he did add that he was maintaining a positive outlook. "I'm going to beat this through chemotherapy or through bone marrow transplants, but either way I’m determined to kick cancer’s ass directly in the nuts," he wrote.

His one-time bandmate Tom DeLonge had earlier expressed support for Hoppus, as did Blink-182 drummer Travis Barker, who told E! News: "“Mark is my brother and I love and support him. I will be with him every step of the way on stage and off and can’t wait for us to play together again soon.”