Melanonychiahttps://en.wikipedia.org/wiki/Melanonychia
Is e pigmentation dubh no donn den phlàta ìnean àbhaisteach a th’ ann an Melanonychia , agus faodaidh e a bhith an làthair mar lorg àbhaisteach air mòran àireamhan ann an daoine Afro-Caribbean.

Tha còmhlan farsaing le pigment domhainn le loidhnichean neo-riaghailteach agus leudachadh pigmentach air na figheagan periungual na chomharradh airson melanoma.

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  • Chithear ioma loidhne neo-àbhaisteach. Tha Melanonychia neo-bhìneach sa mhòr-chuid, ach ma tha mòran loidhnichean neo-àbhaisteach aig an ìre seo, faodar beachdachadh air biopsy.
  • Muehrcke's lines
  • Brown banding
References Melanonychia: Etiology, Diagnosis, and Treatment 32055501 
NIH
Bidh mòran euslaintich a’ lorg melanonychia co-cheangailte, leis gu bheil e ag adhbhrachadh dath donn‑dubh air na h‑ìnean. ’S e adhbhar tric a th’ ann airson dath nan ìnean, le adhbharan a dh’fhaodadh a bhith neo‑seasmhach no trom, leithid melanoma. Faodaidh melanonychia a bhith coltach ri còmhlan fad‑ùine a thig bhon iomadh factor ionadail no siostamach.
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 – Clues for a Correct Diagnosis 32064201 
NIH
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.