This is a complex question and cannot be accurately answered on this platform. Also, many dermatologists will say various things. I believe I posted regarding this issue in the past and suggested the use of imiquimod. There are other alternative options such as laser resurfacing and progressive shave excisions with healing. I suggest seeking the advice of a dermatologic surgeon who has experience in the treatment of lentigo maligna and then follow his/her treatment plan. No one plan is ultimate, there are various ways to go about this condition. I wish you the best of luck, Dr. Emer.