Four years ago I had a prognosis of stage 4 cancer; numerous metastatic melanomas in my lungs and in my brain. Two years later after 3 weekly infusions of Keytruda my lungs and brain were described by an oncologist as "pristine." Bloody brilliant. The radiologists report said the 2 areas were "unremarkable"; i.e., nothing to remark on. Nowadays, I am very happy to be unremarkable.