Lesions are round to oval, pigmented, initially flat, but subsequently raised and with a velvety to finely
verrucous surface. Margins are sharp (as if stuck on normal skin) and have a soft and greasy look. Usually
<1 cm at onset, they grow thicker and larger with time, while new lesions continue to appear. Often
aligned in the direction of skin folds, they can have keratotic plugging on the surface. Although more
common in sun-exposed areas (and often arising from solar lentigines), they may occur anywhere, except for the palms, soles, and mucous membranes.
verrucous surface. Margins are sharp (as if stuck on normal skin) and have a soft and greasy look. Usually
<1 cm at onset, they grow thicker and larger with time, while new lesions continue to appear. Often
aligned in the direction of skin folds, they can have keratotic plugging on the surface. Although more
common in sun-exposed areas (and often arising from solar lentigines), they may occur anywhere, except for the palms, soles, and mucous membranes.