Mark Hoppus has shared more details on his recent cancer diagnosis, confirming to fans in a Twitch stream that he has 4-A diffuse large B-cell lymphoma – the same type of cancer his mother had battled (and eventually beat).As the Lymphoma Research Foundation explain, diffuse large B-cell lymphoma is the most common type of non-Hodgkin lymphoma patients are diagnosed with around the globe, with 18,000 cases reported every year.