The polish may disguise the actual nail color and delay detection. The darkened pigmentation is a chief hallmark symptom of subungual of the nail matrix. Conversely, it should be noted that up to half of all cases of subungual melanoma is amelanotic (not pigmented) and is painless.
Subungual melanoma (SM) is a rare entity; its incidence ranges from 0.7%-3.5% of. Clinically, in some cases at early stages it looks like melanonychia striata .