cancer. definition a group of neoplastic diseases in which normal body cells become malignant ones...
TRANSCRIPT
Cancer
Definition
• A group of neoplastic diseases in which normal body cells become malignant ones– NEOPLASTIC- new or abnormal
growth, uncontrolled and progressive– MALIGNANT-become progressively
worse and to result in death; tend to be invasive
Statistics
• Breast CA most common cancer in women
• Prostate CA most common cancer in men
• African American women lower survival rate
• African American men occurs earlier and lower survival rate
Causes of Cancer
• External Factors– Carcinogenic agents or radiation
• Internal Factor– Hormones– Immune conditions– Inherited mutations
Factors that contribute
• Environmental– Maybe account for 50%– Exposure may have been many years
before
• Hereditary• Biological
– Viruses– Hormone– Chance increases with age
Classifications of Cancer
• Sarcomas– Mesenchymal like bone or muscle– Very destructive and rapid grower
• Carcinomas– Epithelial tissue like breast, stomach,
uterus, skin
• Blood
• Nerve
Characteristic Benign Malignant
Mode of growth Slow
Encapsulated
Rapid
Invades surrounding tissue
Microscopic
Exam
Look like tissue of origin
Appears abnormal
Spread Localized Metastasis—lymph to blood and other tissue
Recurrence Rare Common
Pathogenesis May produce symptoms of pressure
Pain often
Fatal