Doctor found a large dark spot on my back, which reflects potential for being melanoma; the doctor did a biopsy by...

MelanomaSeptember 2, 2026Navis AI

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For informational purposes only

This answer was generated by AI grounded in NCCN guidelines and published medical literature. It is not medical advice. Always consult your oncologist or care team before making treatment decisions.

Sources & medical oversight

Grounded in NCCN Guidelines for Patients: Melanoma — the same guidelines oncologists use.
Developed under the medical oversight of OpenCancer’s physician-scientist team (Chris Apfel, MD/PhD/MBA, CMO · Kaumudi Bhawe, PhD, CSO).
Last updated September 2, 2026. Informational only — not a substitute for your oncology team.

Question asked:

Doctor found a large dark spot on my back, which reflects potential for being melanoma; the doctor did a biopsy by shave method to determine if definitely melanoma and if so, how far it may have spread already

I appreciate you sharing what's happening. Let me help you understand what you're dealing with right now.

What the shave biopsy tells you:

A shave biopsy removes a thin layer of skin. According to NCCN Guidelines for Patients: Melanoma, this method works best when melanoma is less likely. If your doctor suspected melanoma was probable, they typically prefer a deeper biopsy (called an excisional or punch biopsy) because it gives more complete information.

What the biopsy results will show:

The lab will examine the tissue under a microscope and tell you:

Whether it's melanoma or something else
If it is melanoma, how thick it is (this matters a lot for staging)
Other features that affect treatment

Important note about shave biopsies and staging:

Here's something to know: if the biopsy shows melanoma, your doctor may need to do additional surgery later. According to NCCN Guidelines, a wider excision (removal of more surrounding skin) is typically done after a biopsy to make sure all the cancer is gone. This is standard practice.

What happens next:

Once you have biopsy results, your doctor will discuss:

Whether it's melanoma
What stage it is (if it is melanoma)
What treatment makes sense for your specific situation

Questions to ask your doctor when you get results:

Is this melanoma or something else?
If it's melanoma, how thick is it?
Will I need additional surgery beyond the biopsy?
What's the next step in my care?

This information is for educational purposes only. Always consult your healthcare team for personalized medical advice and decisions.

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