 Lentigo malignant LM is an intraepidermal melanocytic proliferation occurring on photoexposed skin. In our project, this term applies both to Dubreuilhs melanosis and to Dubreuilhs intraepidermal melanoma. It consequently excludes invasive melanoma. Although surgery is the treatment of choice, it remains without consensus on the margins 5 mm or 10 mm excision for a localized tumor on the face. 