[en] In Wallonia, the incidence of cutaneous melanoma has steadily increased over the past decades. Hopefully, the early diagnosis made at the premetastatic stage has benefited from great advances both in the clinical and laboratory fields. Thanks to the "Groupement Oncologique Universitaire Wallonie-Liege" (GOUWL) organization, some efforts are currently made in order to better frame and normalize the management of cancer patients. Some medical staffs involved in prospective clinical research bring by their own experience further practical insights for the benefit to the patients. In this field, Belgium is not destituted. We report a brief review of the contribution of the Mosan Study Group of Pigmentary Tumors (GMETP) at the University Hospital of Liege.