Booklet: What You Need to Know about Melanoma

Diagnosis and Staging

If the doctor suspects that a spot on the skin is melanoma, the patient will need to have a biopsy. A biopsy is the only way to make a definite diagnosis. In this procedure, the doctor tries to remove all of the suspicious-looking growth. If the growth is too large to be removed entirely, the doctor removes a sample of the tissue. A biopsy can usually be done in the doctor's office using a local anesthetic. A pathologist then examines the tissue under a microscope to check for cancer cells. Sometimes it is helpful for more than one pathologist to look at the tissue to determine whether melanoma is present.

 

A person who needs a biopsy may want to ask the doctor some of the following questions: Why do I need to have a biopsy? How long will it take? Will it hurt? Will the entire tumor be removed? What side effects can I expect? How soon will I know the results? If I do have cancer, who will talk with me about treatment? When?

If melanoma is found, the doctor needs to learn the extent, or stage, of the disease before planning treatment. The treatment plan takes into account the location and thickness of the tumor, how deeply the melanoma has invaded the skin, and whether melanoma cells have spread to nearby lymph nodes or other parts of the body. Removal of nearby lymph nodes for examination under a microscope is sometimes necessary. (Such surgery may be considered part of the treatment because removing cancerous lymph nodes may help control the disease.) The doctor also does a careful physical exam and, depending on the thickness of the tumor, may order chest x-rays; blood tests; and scans of the liver, bones, and brain.

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