Liquid Biomarker Study in Melanoma and Non-Melanoma Skin Cancers

This study is looking at whether liquid biopsies — blood or fluid tests that detect cancer DNA — can help diagnose and monitor melanoma and other skin cancers like basal cell carcinoma, squamous cell carcinoma, and Merkel cell carcinoma. The goal is to find less invasive ways to detect and track these cancers. **You may be eligible if...** - You are 18 years or older - You have a suspected or confirmed diagnosis of melanoma or another type of skin cancer (basal cell carcinoma, cutaneous squamous cell carcinoma, or Merkel cell carcinoma) **You may NOT be eligible if...** - You are pregnant, a minor, a prisoner, or have a condition that affects your ability to give informed consent - You are cognitively impaired or mentally ill in a way that prevents participation - You are an employee who reports to the study investigators Talk to your doctor to see if this trial is right for you.