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表皮恶性肿瘤是人类最常见的恶性肿瘤，包括基底细胞癌和鳞状细胞癌。它们是来源于表皮、细胞外胚叶及其附属器官的一种恶性肿瘤，有一定的家族遗传倾向。基底细胞癌多发生于头面部，病程发展缓慢，恶性程度较低，且很少转移，故一般愈后较好，与鳞状细胞癌比较相对良性。表皮
Epidermal malignancies are the most common malignancies in humans, including basal and squamous cell carcinomas. They are derived from the epidermis, extracellular ectodermal and its subsidiary organs of a malignant tumor, have a certain family genetic predisposition. Basal cell carcinoma occurs mostly in the head and face, the slow course of development, the lower the degree of malignancy, and rarely transferred, it is generally better after healing, and squamous cell carcinoma is relatively benign. epidermis