Cancer
Cancer is one of the leading causes of death among the world’s population. It is the second largest cause of death around the world, killing 8.8 million people in 2015. The number of cancer cases in the world according to a statistic conducted in 2012 about 14 million cases, and the number of new infections is expected to rise by more than 70% over the next two decades. Cancer can occur in any person, regardless of age. Cancer in the fetus has been recorded during pregnancy, but the risk increases with age. .
Definition of Cancer
Cancer is defined as a type of disease in which abnormal and uncontrollable growth occurs in a group of cells, causing the abnormal division of these cells in abnormal numbers, with the destruction of the adjacent tissue, and the spread of this condition and spread in all areas of the body through the liquid Lymphoma or through blood, and the majority of cancers appear in the form of tumors, but some of them are not apparent, such as leukemia.
Is cancer infectious
Some believe that cancer is contagious, afraid to approach the patient to avoid transmission to them, and believe that any contact with the infected will transmit the disease to them, but to date there is no scientific study indicates that cancer is a contagious disease, the disease is caused by a genetic defect in Cells, and can not be transmitted through contact or contact with the patient.
The most common cancers
- Lung Cancer: His death toll reached 1.69 million.
- Liver Cancer: With a death toll of 788,000.
- Colorectal cancer: Which harvested 774,000 patients.
- stomach cancer: With a death toll of 754,000.
- breast cancer: With a death toll of 571,000.
Causes of cancer
Cancer appears when ordinary cells turn to other malignant and abnormal, because of the changes that result from the interaction between the genetic factors of the patient with three categories of external factors, as follows:
- UV and ionizing radiation.
- Chemical agents are carcinogenic in the routine of life, such as exposure to asbestos, smoking and its components, aflatoxin, arsenic, and alcohol abuse.
- Bacterial agents, such as infections caused by some viruses, bacteria, or parasites.
Treatment and diagnosis of cancer
For cancer diagnosis, a tissue biopsy is performed to examine the presence of cancer following the appearance of a primary deformity index in the cells through radiographs and some symptoms. Cancer treatment depends on the type and location of its spread and stage of development. The treatment consists of a range of surgical treatments, chemotherapy and radiation doses.