Mole grew back after shave biopsy, is this normal? Do I need a second evaluation/biopsy? (Photo)

Question

I had a shave biopsy a couple months ago, and the mole grew back. I am concerned as it looks strange. The biopsy results were benign compound melanocytic nevus. Do I need a second evaluation/biopsy? Please help since I can't afford an appointment right now

Anna Chacon, MD, FAAD · Answer

It is not uncommon for a mole to grow back after a shave biopsy. This occurs because the shave technique removes the top portion of the mole, but melanocytes (pigment-producing cells) can remain deeper in the skin and cause regrowth. This phenomenon is called recurrent nevus and is generally benign, especially since your pathology report confirmed a benign compound melanocytic nevus.

A recurrent nevus can sometimes appear irregular or darker than the original mole, which can understandably be concerning. In most cases, it does not require a repeat biopsy unless there are worrisome changes such as:

Rapid growth

Irregular borders

Multiple or very dark colors

Persistent itching, bleeding, or crusting

If none of these concerning features are present, it is usually safe to continue monitoring. However, if the mole continues to change in appearance, a complete excision (rather than a shave) may be needed in the future to both remove it fully and provide reassurance.

Since your initial biopsy confirmed the mole was benign, and regrowth is a known possibility, this is not unusual. Careful self-monitoring is important, and if changes occur, that would be the time to consider further evaluation.

David Hansen, MD · Answer

Most pigmented moles are best treated by simple excision while flesh colored moles are best shaved.  Since the mole is benign, I would get it  simply excised so it is gone for good.

Mole grew back after shave biopsy, is this normal? Do I need a second evaluation/biopsy? (Photo)

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Mole grew back after shave biopsy, is this normal? Do I need a second evaluation/biopsy? (Photo)

Answers (2)

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Everything you need to know about Mole Removal

Our mission is to create a world where every investment in modern beauty is Worth It.