Dermatofibrosarcoma (dur-mah-toe-fy-bro-sar-com-ma) protuberans (pro-to-bur-anz) (DFSP) is a rare skin cancer that begins in the middle layer of the skin, the dermis. DFSP grows slowly and seldom spreads to other parts of the body.
Because DFSP rarely spreads, this cancer has a high survival rate. However, treatment is essential. Without treatment, DFSP can grow deep into the fat, muscle and even bone. When this happens, treatment is more difficult.
The first sign of this skin cancer is a small bump on the skin. It may resemble a deep pimple or a rough patch of skin. It may also resemble a scar. In children, it can look like a birthmark.