Melanonychia - 黑甲症
观察到不寻常的多条线。黑甲症 (Melanonychia) 大多是良性的，但如果出现许多不规则的线条，则可考虑进行活检。
Muehrcke线 (Muehrcke's lines)
relevance score : -100.0%
References许多患者对黑甲症感到担忧，因为它会导致指甲变成棕黑色。这是一种常见的指甲变色原因，病因范围从良性到潜在的严重疾病，如黑色素瘤。纵向带状黑甲症可能由多种局部或全身因素引起。
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.
如果在甲周组织出现宽而深的色素带，伴有不规则的线条和色素延伸，则可能是黑色素瘤的征兆。