Cancer Definition
Cancer is a collective term for diseases in which abnormal cells divide without control and can use the spread to other tissues. Cancer cells in different parts of the body via the bloodstream and lymphatic spread.
Cancer is not just one disease but many diseases. There are over 100 different types of cancer. Most cancers are on the organ or cell type in which they start - for example, mentioned that the cancer starts in the colon is called colon cancer, cancer that begins in basal cells of skin cancer called basal cell carcinoma.
Cancers can be divided into broader categories. The main categories of cancer include
* Cancer - Cancer that begins in the skin or tissues, organs and internal reporting.
* Sarcoma - cancer that begins in bone, cartilage, fat, muscle, blood vessels or other tissues or support.
* Leukemia - cancer that starts in blood-forming tissues such as bone marrow and causes large numbers of abnormal blood cells to produce and enter the bloodstream.
* Lymphoma and myeloma - cancers begin in cells of the immune system.
* Central nervous system cancers - tumors that begin in the brain and spinal cord.
The development of cancer
all cancers begin in cells of the unit body, the basis of life. To understand cancer, it is useful to know what happens when normal cells into cancer cells.
The body is composed of several cell types. These cells grow and divide in a controlled manner to produce more cells as needed to keep the body healthy. When old or damaged cells, they die and are replaced by new cells.
But sometimes, orderly process goes wrong. The genetic material (DNA) of a cell can be damaged or altered to produce mutations affect normal cell growth and division. If this happens, cells do not die when it is necessary and to make new cells when the body does not require it. The additional cells may have a mass of tissue called a tumor.
Not all tumors are cancerous; tumors can be benign or malignant.
* Benign tumors are not cancerous. Often can be removed, and in most cases they do not go back. Cells from benign tumors do not spread to other body parts.
* Malignant tumors are cancers. The cells of 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.
Some cancers form tumors. For example, leukemia is a cancer of the bone marrow and blood.
Cancer is a collective term for diseases in which abnormal cells divide without control and can use the spread to other tissues. Cancer cells in different parts of the body via the bloodstream and lymphatic spread.
Cancer is not just one disease but many diseases. There are over 100 different types of cancer. Most cancers are on the organ or cell type in which they start - for example, mentioned that the cancer starts in the colon is called colon cancer, cancer that begins in basal cells of skin cancer called basal cell carcinoma.
Cancers can be divided into broader categories. The main categories of cancer include
* Cancer - Cancer that begins in the skin or tissues, organs and internal reporting.
* Sarcoma - cancer that begins in bone, cartilage, fat, muscle, blood vessels or other tissues or support.
* Leukemia - cancer that starts in blood-forming tissues such as bone marrow and causes large numbers of abnormal blood cells to produce and enter the bloodstream.
* Lymphoma and myeloma - cancers begin in cells of the immune system.
* Central nervous system cancers - tumors that begin in the brain and spinal cord.
The development of cancer
all cancers begin in cells of the unit body, the basis of life. To understand cancer, it is useful to know what happens when normal cells into cancer cells.
The body is composed of several cell types. These cells grow and divide in a controlled manner to produce more cells as needed to keep the body healthy. When old or damaged cells, they die and are replaced by new cells.
But sometimes, orderly process goes wrong. The genetic material (DNA) of a cell can be damaged or altered to produce mutations affect normal cell growth and division. If this happens, cells do not die when it is necessary and to make new cells when the body does not require it. The additional cells may have a mass of tissue called a tumor.
Not all tumors are cancerous; tumors can be benign or malignant.
* Benign tumors are not cancerous. Often can be removed, and in most cases they do not go back. Cells from benign tumors do not spread to other body parts.
* Malignant tumors are cancers. The cells of 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.
Some cancers form tumors. For example, leukemia is a cancer of the bone marrow and blood.
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