Diagnosis is usually made based on the appearance of the skin area. A biopsy may be performed to look for cancerous changes.
What information is obtainable regarding pigmented birthmarks?
<s>[INST] Answer the question truthfully, you are a medical professional. This is the question: What information is obtainable regarding pigmented birthmarks? [/INST] \n Diagnosis is usually made based on the appearance of the skin area. A biopsy may be performed to look for cancerous changes.</s>