This study is testing a new drug, LY4101174, to see if it is safe and works well for people with serious solid tumors, which are cancerous lumps in the body. The study has two parts: Phase 1a checks safety and finds the best dose, while Phase 1b sees how well the drug works at this dose. The study could last up to 4 years. It involves people with specific types of cancer, like breast or lung cancer, and requires a certain health status, called ECOG performance status, which rates how well you can do daily activities. Participants cannot join if they have certain health problems, such as uncontrolled diabetes or recent serious heart issues.
- Study length is about 4 years with different phases.
- Participants must have specific types of cancer and meet health criteria.
- Excludes those with certain medical conditions or recent treatments.