Melanonychia
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Lineae inusitatae multiplices observantur. Melanonychia maxime benigna est, sed si in hoc gradu multae lineae irregulares sunt, biopsy considerari potest.
Muehrcke's lines
References
Multi aegri melanonychia de re inveniunt, quod colorum clavi laminae brunneo-nigrae causat. Crebra est ratio unguis coloris, cum causis a benigno in potentia gravis, ut melanomas. Cohors longitudinalis melanonychia sicut melanonychia ex variis factoribus localibus vel systemicis derivari potest.
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 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.
Cohors lata, profunde pigmentata lineis irregularibus et extensione pigmentatae in fibras periunguales signum est melanoma.