Lentigo maligna. The facial skin was earlier operated upon because of a histologically proven junction type of benign naevus. Later recurrence proved to be Lentigo maligna (melanoma in situ). Aggressive therapy with liquid nitrogen cryosurgery has been successful so far for 3 years. The temperature under the lesion should be lower than -50 ° during the double freeze-thaw cycles. Surgical operation is the therapeutic alternative.