Subungual Melanoma is most easily defined as a cancer of the nail unit. Identified. At which point the stage, treatment plan, and prognosis are assessed . Symptoms. Roughly half of these streaks are brown, blue, or black, while the other half are non-pigmented.. This isn't the case with melanoma under the nail matrix.
Other types of melanoma rarely arising under the nails are nodular melanoma and desmoplastic melanoma.. See more images of melanoma of the nail unit .