NCCN Guidelines for Patients® | Melanoma

27 NCCN Guidelines for Patients ® : Melanoma, 2018 2  Tests for melanoma Review Review † † Cancer tests are needed if your skin shows signs of cancer. † † Cancer tests are used to plan treatment. † † Your health history and body exam inform your doctor about your health. † † Testing tissue removed from your body is the only way to know if you have melanoma. † † Tests of lymph nodes can show if cancer has spread. † † Blood tests monitor melanoma that has spread far to other parts of the body. † † Tests that take pictures of the inside of your body may show if the cancer has spread.