sarcoma mesotheliomalymphoma metastatictreatment of metastatic melanomametastatic mesotheliomamalignant melanoma metastaticpulmonary metastatic diseaseimmunotherapy metastatic melanomaprognosis metastatic melanomametastatic pancreatic carcinomahepatic metastatic diseasemetastatic adenocarcinoma prognosismetastatic hepatocellular carcinoma