In more than 9 out of 10 cases, it appears in a place where no skin lesion was present. It can then appear “as” a mole, i.e. a dark, generally asymmetrical, mostly flat spot that evolves more or less rapidly (sometimes in several months, sometimes over years). Rarely, it may present as a raised lesion of rapid onset and on fair skin, it may be achromic (unpigmented).
Digitalized dermoscopy or mapping, a state-of-the-art technology, frequently allows the detection of this type of lesion. Indeed, it allows, on the one hand, to highlight new lesions thanks to macroscopic photographs and, on the other hand, evolving lesions which could be cancerous.
Follow-up is then carried out by means of very enlarged photographs taken at intervals of several months. This examination is reimbursed for high-risk patients with a very large number of moles and/or a family/personal history of melanoma.