This study is a major contribution to the establishment of standard margins for excision of melanoma in situ. The authors work from the reasonable conceit that Mohs surgery with repeated narrow ...

A surgical excision was performed of the entire ungual ... indication for a matrix biopsy that showed the presence of melanoma in situ. The therapeutic approach was the complete resection of ...

Surgery to remove (excise) melanoma removes the cancer and a border of healthy tissue. In the "Area of excision" picture: The inner circle represents the melanoma and healthy tissue that are excised.