label: Blue nevus
label_lc: blue nevus
description: "A solitary, bluish, smooth surfaced macule, papule or plaque that is generally round or oval in shape. The histopathology of blue nevi varies by subtype, but general characteristics include a vertical wedge or bulbous shaped proliferation of spindle cells, dendritic melanocytes, and melanophages into a sclerotic dermis or subcutis."