Def Leppard guitarist Vivian Campbell's pioneering cancer treatment is working, his doctors have told him. He was diagnosed with Hodgkin's lymphoma in 2013 then wrongly given the all-clear in 2014. Later that year he began an experimental program of medical attention based around the drug Pembrolizumab.

Campbell reports: "I had great news this morning - the mighty Pembrolizumab appears to be holding the tumors at bay. Doc said they might even be slightly smaller than they were at the last scans. Needless to say I'm most chuffed at this result!"

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