Well Dr bigda:
What is a fungating wound?
A fungating (malignant) wound is when cancer that is growing under the skin breaks through the skin to create a wound. As the cancer grows, it blocks and damages tiny blood vessels, which can starve the area of oxygen. This causes the skin and underlying tissue to die (necrosis). There may also be infection. The wounds will often look like a fungus or cauliflower. Other areas of the wound may become ulcerated.
Fungating wounds are rare, and most people who have cancer will never develop a fungating wound. They can develop in the area where the cancer started (the primary), or when the cancer has spread to another part of the body (the secondary or metastasis). If a fungating wound does develop, it is most likely to happen with breast cancer, head and neck cancer and melanoma.