内脏恶性肿瘤可有皮肤表现,其联系主要有以下四种:1.遗传性疾病伴有皮肤表现,并具有好发肿瘤的遗传素质;2.皮肤表现是接触致癌原的标志;3.肿瘤引起各种皮肤反应;4.肿瘤转移或侵入皮肤;5.恶性肿瘤由皮肤的非恶性肿瘤细胞衍变而来. 一、遗传性疾病 (一)Gardner综合征有表皮样囊肿、骨瘤、纤维瘤和结肠息肉,后者常可早期癌 Visceral malignancies may have skin manifestations, and their associations are mainly in the following four categories: 1. Hereditary diseases are accompanied by skin manifestations and have the genetic quality of a good tumor; 2. Skin manifestations are signs of exposure to carcinogens; 3. Tumors cause Various skin reactions; 4. Tumor metastasis or invasion of the skin; 5. Malignant tumors derived from the skin of non-malignant tumor cells derived from a genetic disease (A) Gardner syndrome epidermoid cyst, osteoma, fibroids and Colon polyps, the latter often early cancer