This clinical trial is focused on studying the effects of a new treatment combination for certain types of cancer. The diseases being studied include colorectal cancer, melanoma, and hepatocellular carcinoma, which is a type of liver cancer. The treatment involves a combination of medications: E7386, pembrolizumab (also known as Keytruda), and in some cases, lenvatinib (known as Lenvima). E7386 is a tablet taken by mouth, pembrolizumab is given as an infusion into a vein, and lenvatinib is available in capsule form.
The purpose of the study is to evaluate the safety and effectiveness of these medications when used together in patients who have already received other treatments for their cancer. The study is divided into two parts. In the first part, the focus is on understanding how safe and tolerable the combination of E7386 and pembrolizumab is for patients. In the second part, the study looks at how well the treatment works in shrinking tumors or stopping them from growing in patients with melanoma, colorectal cancer, and hepatocellular carcinoma. For some patients with hepatocellular carcinoma, the study also examines the effects of adding lenvatinib to the treatment.
Participants in the study will receive the medications and be monitored over time to see how their cancer responds to the treatment. The study aims to find the best dose of E7386 when used with pembrolizumab and to observe any side effects that may occur. The study will also measure how long the treatment can keep the cancer from getting worse. This research is important for developing new treatment options for patients with these types of cancer who have not had success with other therapies.



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