An Invisible Basal Cell Carcinoma Located on the Right Forearm in a 78-Year-Old Patient

A 78-year-old patient was referred for a regular dermoscopic examination. The patient had a previous history of superficial spreading melanoma, Breslow thickness 2.1 mm, located on the back, 4 years earlier. During the regular examination, a small, clinically unremarkable, partially pigmented lesion, 4 mm in diameter, located on the right forearm was noticed and dermoscopically evaluated. The whitish structureless area in the central part of the lesion, with leaf-like structures located on the upper edge of the lesion, while on the lower edge of the lesion, concentric structures described by central brown point with fine and delicate radial projections were seen. These described dermoscopic features supported the diagnosis of a small partially pigmented superficial basal cell carcinoma, which was confirmed by a pathohistologist.