In cancer, one particular type of body cell begins to grow and multiply abnormally, eventually forming a mass of renegade cells that doctors call a malignancy or a malignant tumor. Under a microscope, malignant cancer cells look different from their normal neighbor cells, and they act differently, too. They are aggressive and invasive; they don't respect the body's established boundaries between cells and tissues. Many of these malignant cells manufacture destructive chemicals called proteases that …showed first 75 words of 513 total…

…showed last 75 words of 513 total…stomach cancer, while a parasitic schistosomiasis infection is 1 risk factor for bladder cancer. Dietary factors High-fat diets (where fat accounts for 40% to 45% of total daily calories) have been linked to cancer of the breast, colon, prostate gland, and endometrium. Chronic injury or inflammation In the skin, squamous cell carcinoma can develop in cells that have experienced long-term injury or scarring from burns, pressure ulcers ("bed sores"), discoid lupus erythematosus, or cancer treatments that use radiation