A 67‐year‐old woman with no personal history of melanoma pre | Figure 1

A 67‐year‐old woman with no personal history of melanoma presented with a 4‐mm nonpalpable brownish lesion of unknown evolution located on volar skin of the right foot (a). Dermoscopy showed a previously undescribed transition pattern formed by a peripheral atypical pigment network with central blotch on nonglabrous skin and a parallel ridge on the glabrous side of the lesion (b). Histology revealed proliferation of atypical melanocytes arranged as single cells along the basal layer of the epidermis (c). Melan‐A stain was performed (d) and diagnosis of acral lentiginous in situ melanoma was confirmed. A transition pattern combining typical pigment network and volar benign pattern was previously described; the identification of this new transition pattern can be helpful in recognition of acral melanoma in clinically banal‐appearing lesions.