Understanding Cancer. Understanding Cancer. Understanding Cancer. Understanding Cancer. Understanding Cancer. Metastasis, Or Spread of Cancer. Once cancer cells are attached, they may pass through the lining of the lymph or blood vessel. Attachment A primary tumor attaches to a
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Metastasis, Or Spread of Cancer Once cancer cells are attached, they may pass through the lining of the lymph or blood vessel. Attachment A primary tumor attaches to a blood vessel (or lymph node). The cancer cells may then move through the blood and lymph system to form a secondary tumor, or metastasis, at another site in the body. Cancer cells move into the circulation system and spread to other parts of the body, colonizing other organs. This traveling and reproducing is called metastasizing.
Seven Warning Signs of Cancer Change in Bowel or Bladder Habits A Sore That Doesn’t Heal Unusual Bleeding or Discharge Thickening or Lump in the Breast, Testis, or Elsewhere Indigestion or Difficulty Swallowing Obvious Change in a Wart or Mole Nagging Cough or Hoarseness
Lowering Your Cancer Risk Stay Smoke-Free The single most devastating and preventable cause of cancer deaths in the United States People who smoke two or more packs of cigarettes per day are 15 to 25 times more likely to die from cancer than nonsmokers. Eat Smart The same foods that keep your heart healthy, your blood pressure low, your bones strong, and your weight under control are most likely to reduce your risk of cancer.
Lowering Your Cancer Risk Maintain a Healthy Weight Obesity causes 1 in 6 cancer deaths. Limit Exposure to Environmental Risks Avoid carcinogens such as nickel, chromate, asbestos, and vinyl chloride. Limit chronic use of hair dye, especially dark shades of permanent coloring. Be Vigilant Proven methods of cancer prevention and early detection could save more than 60,000 lives a year. Schedule screening exams, and perform regular self-exams.
Common Types of Cancer Carcinoma Lymphoma Sarcoma Leukemia
Three Types of Skin Cancer Squamous-cell cancer Melanoma Basal-cell cancer
ABCD: The Warning Signs of Melanoma Asymmetry: One half doesn’t match the other half Border irregularity: The edges are ragged, notched, or blurred Color: Rather than uniform pigmentation, there are shades of tan, brown, and black, with possible dashes of red, white, and blue. Diameter: The mole is larger than 6 mm (about the size of a pencil eraser).
Breast Self-Exam Fig. 16-6, p. 468