Spontaneous regression in patients with metastatic cancer is an incredibly rare event. It has been described after infection in cancer patients and also rarely in patients with renal cell cancer (usually after resection of the renal primary) and, less commonly, in patients with metastatic melanoma.
Primary Objective To collect peripheral blood from patients with metastatic melanoma and renal cell cancer and spontaneous regression for studies of immune response and other studies.
Secondary Objective To collect clinical data from subjects registered to this study. Clinical data collection will include demographics and cancer characteristics, history and treatment.
