该疾病表现为在之前正常皮肤上出现长大迅速、不规律的黑斑，或者原有的黑痣其大小、颜色或质地发生改变。

The disease is mainly identified by a fast-growing, irregular dark spot on previously normal skin or in an existing mole that changes in size, colour or texture.

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该疾病表现为在之前正常皮肤上出现长大迅速、不规律的黑斑，或者原有的黑痣其大小、颜色或质地发生改变。

The disease is mainly identified by a fast-growing, irregular dark spot on previously normal skin or in an existing mole that changes in size, colour or texture.

youdao