Melanonychia is a black or brown pigmentation of the normal nail plate, and may be present as a normal finding on many digits in Afro-Caribbeans, as a result of trauma, systemic disease, or medications, or as a postinflammatory event from such localized events as lichen planus or fixed drug eruption.
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A na-ahụ ọtụtụ ahịrị na-adịghị ahụkebe. Melanonychia na-adịkarị mma, mana ọ bụrụ na enwere ọtụtụ ahịrị oge na ọkwa a, enwere ike ịtụle biopsy.
Ọtụtụ ndị ọrịa na-ahụ melanonychia gbasara ya, n'ihi na ọ na-ebute mwepu agba aja aja nke efere ntu. Ọ bụ ihe na-emekarị maka ntu ntu, na-akpata site na benign ruo nwere ike dị njọ, dị ka melanomas. Ogologo ogologo dị ka melanonychia nwere ike ịpụta site na ihe dị iche iche mpaghara ma ọ bụ usoro. Melanonychia is a very worrisome entity for most patients. It is characterized by brownish black discoloration of nail plate and is a common cause of nail plate pigmentation. The aetiology of melanonychia ranges from more common benign causes to less common invasive and in situ melanomas. Melanonychia especially in a longitudinal band form can be due to both local and systemic causes.
Melanonychia represents a brown to black discoloration of the nail plate that may be induced by benign or malignant causes. Two main mechanisms are involved in the appearance of melanonychias, i.e., melanocytic activation and melanocytic hyperplasia.
Otu eriri obosara nke nwere pigmenti nwere ahịrị na-adịghị mma yana ndọtị nwere pigmenti n'ime anụ ahụ dị n'akụkụ bụ ihe ịrịba ama maka melanoma.