A study looking at a blood test to detect when melanoma has started to get worse (PerceIVe)

This study is looking at circulating tumour DNA to detect when advanced melanoma is starting to grow again or has spread to a new area of the body.

It is for people who have melanoma on the skin that has spread to nearby lymph nodes or to another part of the body. And are having treatment with an immunotherapy. Or their last treatment was an immunotherapy.