Monday, December 19, 2011

What is Cancer ???

Cancer is a disease of abnormal cell division without control and can spread to surrounding tissues. Cancer cells can spread to other parts of the body through the bloodstream and lymphatic system. Malignant tumors are called cancer. Cancer has the potential to invade and destroy adjacent tissues and cause metastasis. According to the present concept of cancer is a disease gene. 

A normal cell can become cancerous cells by a variety of reasons when there is an imbalance between the function of oncogenes in tumor gene suppresor in the process of a cell grows and blossoms. Changes or gene mutations that cause the occurrence of oncogenes and hiperekspresi or less / loss of gene function causes cell tumor suppresor grow uncontrollably. These changes run in several stages or known by the multistep process of carcinogenesis.

Cancer is not a single disease but a collection of some type of disease. More than 100 types of cancer have been found. Most cancers are named for the organ or cell type in which cancer cells begin to be. For example, cancer that begins in the colon is called colon cancer, cancer that occurs first in the basal cells of the skin is called basal cell carcinoma.

Here are some categories of cancer:

1. Carcinoma: Cancer that begins in the skin or tissue that protects the inner organs.
2. Sarcoma: cancer that occurs in bone, cartilage tissue, fat, muscle, blood vessels, or connective tissue.
3. Leukemia: Cancer that occurs in the blood-producing tissues such as bone marrow and causes an increase in the number of abnormal blood cells.
4. Lymphoma and Myeloma: cancer that occurs in immune system
5. The composition of the Central Nervous Cancer: Cancer that occurs in brain tissue and bone marrow.