Oral melanoma mostly occurred in the upper gingival and the palate.The oral symptoms were usually painless, bleeding and ulceration clinically.One third of the lesion was pigmented.

• 一般黑色素瘤外观表现为有色斑的肿块，症状通常则是呈现无痛现象，其他，如外观表面溃疡、流血疼痛感症状等也经常会出现于临床上。