Mark Hoppus receives 'best possible news' on Stage 4 Lymphoma By Mark Hoppus has received some good news regarding his cancer treatment. The Blink-182 bassist updated fans via Twitter on Monday, sharing that the chemotherapy he's been undergoing for Stage 4 lymphoma appears to be working. READ MORE: "Scans indicate that the chemo is working!" Hoppus tweeted. "I still have months of treatment ahead, but it's the best possible news. I'm so grateful and confused and also sick from last week's chemo. But the poison the doctors pump into me and the kind thoughts and wishes of people around me are destroying this cancer. Just gonna keep fighting..."