什么是皮肤癌？

• 皮肤癌是异常细胞失控生长 表皮（皮肤最外层）的病变是由未修复的 DNA 损伤引发的突变所致。
• 这些突变 导致皮肤细胞迅速增殖，形成恶性肿瘤。
• 皮肤癌的主要类型 旨在 基底细胞癌 (密件抄送), 鳞状细胞癌 （南卡罗来纳州）， 黑色素瘤 和 默克尔细胞癌 (MCC)。

继续阅读以找出可能导致皮肤癌的原因。

皮肤癌是什么样的？

由于肤色、肿瘤大小、类型以及在身体上的位置等因素，皮肤癌在不同人身上的外观可能差异很大。请访问我们的“皮肤癌图片”页面，查看一系列照片，帮助您了解皮肤癌的外观。查看图片。

皮肤癌很容易被忽视，因为它看起来往往和日常小问题没什么两样，但随着时间的推移，它的发展却可能出乎意料。任何新出现的、发生变化的或久治不愈的病变都值得仔细检查。

皮肤癌可能模仿的一些看似无害的事物：

• 一直消不掉的痘痘。 基底细胞癌 can show up as what seems like a pimple, except it never really comes to a head and never clears. It might bleed a little, scab over and then come right back in the same spot. If a “pimple” has been hanging around for weeks and looks a bit pearly or shiny, get it checked by a dermatologist.
• 一个不断裂开的伤疤。 One of the signs of both 基底细胞 和 鳞状细胞癌 is a sore that scabs over, looks like it’s healing, then breaks open and bleeds again without ever fully closing up.
• 淤青久久不消。 正常的瘀伤会在一两周内消退。 黑色素瘤 看起来像瘀伤，但却久久不消，尤其当它出现在你没有磕碰的地方时——比如指甲下、手掌上或脚底——就更值得注意了。
• 新出现的疣或正在发生变化的疣。 鳞状细胞癌 can look like a rough, raised, wart-ish growth. A wart you’ve had forever is one thing; one that appears out of nowhere in adulthood, keeps growing or starts to bleed is worth having checked.

是什么导致皮肤癌？

皮肤癌的两个主要原因是太阳的有害物质 紫外线 (UV) 并使用紫外线 制革 床。 吸烟 can also increase risk of death from some types of skin cancer. A 完整的防晒策略 is the best-supported way to prevent UV damage that can lead to skin cancer.

The good news is that if skin cancer is caught early, your dermatologist can treat it with little or no scarring and the best chance of eliminating it entirely. Your doctor may even detect a growth at a 癌前期 stage, before it has become a full-blown skin cancer.