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Hypo/amelanotic skin lesions present a diagnostic chal-lenge, and dermoscopic analysis can often help in deter-mining whether a lesion is benign or malignant (1–3). The presence of a vascular pattern characterized by poly-morphic vessels, such as hairpin-like, pinpoint and linear irregular vessels, may be the only significant dermoscopic finding of amelanotic melanoma (AM) (4).As described previously, morphological changes in dermoscopic patterns have been associated with the characteristic evolution of benign melanocytic naevi after a long-term follow-up of 12 months (5, 6). Rapid and irregular modifications often suggest malignancy (6). The diagnosis of early-phase AM is especially challenging. We report here two cases of AM characterized by der-moscopic changes in vascular pattern observed during a follow-up period of 6–10 months after the initial visit.CASE REPORTS

Dermoscopic Evolution of Vascular Pattern in Two Cases of Amelanotic Melanoma