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.
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。
2
Melanomas appear as a mole or freckle that changes colour, size or shape, but are the most dangerous type of skin cancer.
黑色素瘤开始时呈现色素痣或雀斑的外观，但颜色、大小和形状上有区别，是皮肤肿瘤中最危险的一类。
3
Other warning signs are a change in skin color and uneven borders around a mole.