Cancer is the leading cause of death worldwide, and that only in 2012 the World Health Organization (WHO) accounted for 8.2 million deaths generated by this disease in that year.
This disease starts in a normal cell anywhere in the body, which affected their life cycle and reproduction causing a rapid multiplication of abnormal cells that grow beyond their usual boundaries generating tumors. When these tumors begin to invade other parts of the body it is known as metastasis, making it difficult to treat and can lead to death of the patient.
WHO states that we are all predisposed to developing this condition by inherited genetic factors, but these are enhanced by exposure to ultraviolet or ionizing radiation, chemical radiation such as asbestos, smoke snuff or arsenic, and infections caused by various types of bacteria, viruses or parasites.
In addition, aging is another crucial factor in the development of cancer because the incidence of this disease increases with increasing age of the person due to the accumulation of risk factors and loss of effectiveness with the mechanisms of cell regeneration an adult body.
Although there are more than a hundred types of cancer, WHO states that the most common being lung, liver, gastric, colorectal, breast and esophagus.
Lung cancer in 2012 generated just over 1.59 million deaths, so it is the most common worldwide. This has two subtypes: non-small cell reproduced and spreads more slowly, and the small cell that reproduces and spreads quickly in the area and other parts of the body.
a07Sus main risk factors are cigarette smoke in active or passive smoking, exposure to asbestos, coal dust or radioactive radon gas. In addition to having a lung disease such as tuberculosis.
Liver cancer develops in the liver and has three types: hepatocellular (most common), metastatic (generated elsewhere in the body such as the lungs and reaches the liver), and hepatoblastoma that develops in childhood.
This caused in 2012 about 745 thousand deaths and their main triggers include hepatitis, cirrhosis and hemochromatosis.
Gastric cancer, also known as stomach is difficult to detect because it usually has no symptoms, however, weight loss, bad breath, unusual bleeding, diarrhea and vomiting blood, black stools, casual constipation, or burning sensation when eating they are alarm signals.
Some of the causes include cigarette smoking, high fat diet and spicy, pernicious anemia, gastritis, stomach infections and having a family history of this disease.
Colon cancer or colorectal cancer develops in the large intestine and is more common in women. Although the causes of this disease are not known, some risk factors are being increased to 50 person-years, diet high in fat and red meat, have a history of polyps in the colon and rectum, colitis, obesity, smoking and diabetes.
This involvement occurs when the patient has diarrhea and constant constipation, blood in the stool, abdominal discomfort and feeling of frequent fatigue and weight loss.
Breast cancer, also known as breast or breast, occurs mostly in people of the female sex, but men can get it, however in them is more aggressive.
Although this condition does not present specific causes, have a family or personal history of breast cancer, be greater than 50 years exposure to estrogen, increased breast density and alcohol abuse are risk factors that increase the likelihood of contracting this disease .
With 521,000 deaths in 2012, this type of cancer is one of the few that has clear symptoms and the sufferer can quickly identify, as the growth of a lump near the breast or underarm area or neck , change in the shape or size of the breast, abnormal secretions, feel pain to the skin of the breast and nipple have introduced or invested in the breast.
a08Por Finally, esophageal cancer has two main types: squamous cell carcinoma and adenocarcinoma, which arises from the cells that bind the esophagus to the stomach.
To mention a few risk factors, this condition occurs mostly in men over 60 years of age who consume snuff and alcohol, with human papillomavirus (HPV), stomach ulcers or damage to the esophagus from toxic substances virus.
The symptoms are varied, but include difficulty swallowing food, pain when eating, coughing up blood, nausea, vomiting and weight loss.
You can take various measures to prevent this disease. The World Health Organization says the snuff is the most important, cause about 22% of global cancer deaths and about 71% of global deaths from lung cancer factor.
Moreover, as prevention is necessary to a healthy diet that includes fruits and vegetables, often visit the doctor, avoid drinking alcohol and avoid burning waste fuels or solid at home.
Via: WHO Health Library