cancer
As the cells proliferate they may form tumors (mass of tissue)
Not all tumors are cancerous; tumors can be ________ or ______.
benign or malignant.
_______aren't cancerous.
-They can often be removed, and, in most cases, they do not come back. Cells in benign tumors do not spread to other parts of the body.
Benign tumors
______ are cancerous.
-Cells in these tumors can invade nearby tissues and spread to other parts of the body. The spread of cancer from one part of the body to another is called metastasis.
Malignant tumors
The main categories of cancer include:
-Carcinoma
-Sarcoma
-Leukemia
-Lymphoma and Myeloma
-Central nervous system cancers
- cancer that begins in the skin or in tissues that line or cover internal organs. This is often called epithelial tissue.
Examples: Bladder, Brain, Breast, Cervical, Colorectal, Endometrial, Kidney (Renal), Lung, Melanoma (skin), Ovarian, Pancreatic, Prostate and Thyroid.
Carcinoma
- cancer that begins in bone, cartilage, fat, muscle, blood vessels, or other connective or supportive tissue.
Sarcoma
- cancer that starts in blood-forming tissue such as the bone marrow, causing large numbers of abnormal blood cells to be produced and enter the bloodstream.
Leukemia
- cancers that begin in the cells of the immune system.
Lymphoma and Myeloma
- cancers that begin in the tissues of the brain and spinal cord.
Central nervous system cancers
Rist factor of cancer
- growing older
-tobacco
- sunlight
- Alcohol
-Family History of Cancer
-Certain HormonesCertain --Chemicals and Other Substances
-Ionizing Radiation
therapy for cancer
- surgery
- chemotherapy
- radiotherapy
capacity to spread to distant organs via blood vessels or lymphatic channels
(metastasis)