stage 4 melanoma survivor storieschances of surviving stage 4 melanomastage 4 melanoma survival storiesstage iv melanoma survivalinternal melanoma stage 4stage 4 melanoma immunotherapymetastatic melanoma stagesstage 3 melanoma prognosisnodular melanoma stage 4stage 4 metastatic melanoma cancerstage 4 pancreatic cancer survivorsstage 4 cervical cancer survivors