He wrote, “I have cancer.” It’s a horrible thing and it’s scary. But I have amazing doctors, family members and friends who will help me get through. 

Mark revealed that he was diagnosed with stage four diffuse large-cell lymphoma. “My cancer’s not bone-related, it’s blood-related,” he said in a clip that was shared by the YouTube account Blink-182 Chile. My blood is trying to kill my body.” 

He expanded further upon the mental and physical toll his illness took on him in a December 2021 interview with GQ.  

He said, “I went through a very dark time following learning.” I went through this entire period of not knowing what to do. why meBut of course me. It would be me. It’s been so good for us, we have had such good fortune and luck, that things just seem to fall into place over the years, so it was only natural for me to be due. It was my due. 

He described chemotherapy as “like being on the worst international, overnight flight where you can’t sleep or get comfortable,” but noted that he was able to find solace speaking with his mom, who had previously beaten the same type of cancer. 

He said that his greatest resource was her throughout the process. Nobody knows the pain like someone who has had chemotherapy.