NCIt related terms : Acral lentiginous melanoma, malignant;
NCIt definition : A form of melanoma occurring most often on the plantar, palmar, subungual, and periungual
skin. It presents as a pigmented macular lesion with irregular borders. Morphologically,
it consists of atypical spindled and dendritic melanocytes. The epidermis is often
hyperplastic and there is pagetoid infiltration of the epidermis by anaplastic cells.;