Rapid tumor growth was associated with tumor thickness, ulceration (formation of a break or sore on the skin), amelanosis (lack of pigment in the tumor), regular borders, eleation and symptoms.

• 快速肿瘤增生与肿瘤的厚度，溃疡形成，黑色素缺失症，规则边缘，隆起和症状有关。