Melanoma (Skin) Stage IV

This is a multicenter, open-label, randomized (1:1) trial designed to evaluate whether ctDNA-guided interruption of immune-checkpoint inhibitor (ICI) therapy provides comparable survival to standard of care (SoC) continuous ICI therapy in patients with histologically confirmed advanced/metastatic non-small cell lung cancer (NSCLC), melanoma, microsatellite instability-high (MSI-High)/Deficient Mismatch Repair (dMMR) colorectal cancer (CRC), renal cell carcinoma (RCC) and other solid tumors. This study will be conducted in up to 100 sites.

Previous research has shown that a higher fiber intake may have a beneficial effect on the intestinal health and improve the effectiveness of immunotherapy, but this is not certain. The objective of this double-blinded randomized clinical trial is to analyze, whether increased dietary fiber intake by patients with metastatic melanoma will increase the relative amount of Bifidobacterium, which in turn stimulates immune cell activity and improves the response to immunotherapy.