2 doctors weighed in:

Can a recurrent Nevus be misdiagnosed as melanoma or dysplastic if the pathologist is not aware of previous biopsy or laser ablation?

2 doctors weighed in
Dr. James Davie
Pathology

In brief: False DX of melanoma

When a benign or dysplastic nevus grows back after biopsy, and is re-biopsied or excised, it may now show features that closely mimic a melanoma under the microscope.
This melanoma-like pattern is called "recurrent nevus phenomenon." A pathologist might accidentally misdiagnose a benign, recurrent nevus as melanoma, if they don't know (or don't suspect) it was previously biopsied.

In brief: False DX of melanoma

When a benign or dysplastic nevus grows back after biopsy, and is re-biopsied or excised, it may now show features that closely mimic a melanoma under the microscope.
This melanoma-like pattern is called "recurrent nevus phenomenon." A pathologist might accidentally misdiagnose a benign, recurrent nevus as melanoma, if they don't know (or don't suspect) it was previously biopsied.
Dr. James Davie
Dr. James Davie
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Dr. David Levens
Surgery - Plastics

In brief: Incompletely removed

A nevus is a benign skin growth (mole or beauty mark) that may be of concern if it has a changing or irregular appearance.
A biopsy can be performed to determine if there are abnormal cells that would prompt removal. If not removed completely, it can recur. Further removal is then indicated if the cells were abnormal. It can be difficult to interpret pigmented cells, a challenge for pathologists.

In brief: Incompletely removed

A nevus is a benign skin growth (mole or beauty mark) that may be of concern if it has a changing or irregular appearance.
A biopsy can be performed to determine if there are abnormal cells that would prompt removal. If not removed completely, it can recur. Further removal is then indicated if the cells were abnormal. It can be difficult to interpret pigmented cells, a challenge for pathologists.
Dr. David Levens
Dr. David Levens
Thank
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