Management of lentigo maligna.

Lentigo maligna melanoma is a melanoma in situ on sun-damaged skin. It is a variably brown-pigmented flat patch on the head or neck of elderly patients. Its growth is generally slow, but it can become an invasive form of melanoma. Multiple reported treatment options are reviewed. Wide-margin Mohs micrographic surgery with peripheral permanent pathologic confirmation of a clear margin is recommended as treatment of choice.