Reflectance Confocal Microscopy Findings in a Small-Diameter Invasive Melanoma.

The diagnosis of a small-diameter melanoma may be challenging. We report the case of a 57-year-old man with a small pigmented papular lesion (2.5-mm diameter) that was suspicious on dermoscopy. A more confident differential diagnosis between an atypical nevus and a melanoma was necessary for correct management. Reflectance confocal microscopy (RCM) allowed a confident diagnosis in this lesion, which was an invasive melanoma with 0.3-mm Breslow thickness. This case highlights the benefit of RCM to reach a confident diagnosis and correct management of a small-diameter invasive melanoma.