According to the reports and researchers, every year millions of people are diagnosed with cancer and a large number of people are recorded as dying from cancer.
The relationship between the cancer and smoking is well established. The prevalence of cancer is increasing rapidly throughout the world. Cancer is one of the leading cause of deaths of both men and women. Cancer is a disease which occurs when the normal cells of the human body starts to grow uncontrollably. The growth and functions of the cells in the body are controlled by DNA and there are evidence that suggest that exposure to tobacco damages the DNA. When the DNA gets damaged, it causes the cells to grow uncontrollable and leads to the formation of cancerous tumors.
In the United States, lung cancer is considered to be the deadliest cancer which occurs in an uncontrolled way in one or both the lungs. Basically, lung cancer can be categorized into two groups - primary lung cancer and secondary lung cancer. Primary lung cancer is defined as a cancer that starts in the lungs and can be spread to other parts of the body such as the lymph nodes, brain, liver, adrenal glands and bones. Whereas on the other hand, secondary lung cancer, also known as metastatic cancer in the lungs is defined as a cancer that develops in another part of the body and spreads to the lungs. Common signs and symptoms that are associated with the development of lung cancer include cough, dyspnea, wheezing, weight loss, decreased appetite, and chest pain.
Cigarette smoking is the largest single cause of lung cancer and is responsible for almost 90% of the diagnosed cases. Although many factors affect the lung cancer risk, cigarette smoking is the largest single factor that contributes to the dramatic increase in the rates of lung cancer. Cigarette smoking contains a large number of chemicals and according to the researchers more than 60 cancer causing chemicals are found in cigarette smoking. Cigarette smoke can result in damage to DNA and mutation.
2. Oral Cancer
Oral cancer is one of the cancer that is significantly associated with morbidity and mortality. According to the studies, a large number of people are diagnosed from the oral cancer and thousands of people die from this disease. The oral cancer grows on the tongue, the lining of the mouth and gums, the floor of the mouth, the base of the tongue and oropharynx.
The incidence of developing oral cancer and morality among men and women are highly and closely associated with the exposure to tobacco. There are different kinds of risk factors such as age, and race but most people who are diagnosed from oral cancer are found to be smokers. There are evidence to prove that the risk of developing oral cancer increases at a very high rate when an individual is frequently exposed to tobacco or cigarette smoking. Consumption of excessive alcohol also increases the risk of developing oral cancer.
Some of the signs and symptoms that occur in people having oral cancer are sores that do not heal, lumps on the lip, mouth or throat, numbness in the mouth, unusual pain in the mouth, and difficulty in chewing and swallowing.
3. Esophageal cancer
The incidence of developing esophageal cancer is increasing each year. Esophageal cancer is one of the cancer that is responsible for cancer related mortality worldwide. Esophageal cancer begins when the cells that line the esophagus grows in an uncontrolled way and forms a tumor. There are two main types of esophageal cancer:
Squamous cell cancer that develops in the upper and middle part of the esophagus.
Adenocarcinoma is cancer that develops in the glandular tissue in the lower part of the esophagus.
The risk of developing esophageal cancer is more in smokers as compared to the non-smokers. Exposure to tobacco products is the greatest risk factor of esophageal cancer. Tobacco products such as cigarette, cigar, pipes, or chewing tobacco are usually found to be linked with the patients who are diagnosed with esophageal cancer. The prevalence of developing cancer depends on various factors such as a number of packets an individual smokes a day and the number of years an individual is exposed to tobacco.
4. Pancreatic cancer
Pancreatic cancer is a disease in which the cells in the tissues of the pancreas appears to be abnormal. The pancreas is that organ in the body that produces insulin and is located in the abdomen behind the stomach. The pancreas is made up of two different types of tissues that perform different functions - the exocrine pancreas secretes enzymes into the digestive tract and the endocrine pancreas that secretes glucagon.
Pancreatic cancer is divided into two main groups:
- Exocrine tumors - It develops in the exocrine cells and it is the most common type of pancreatic cancer. Almost 95% of exocrine tumors are adenocarcinomas and it usually starts in the ducts of the pancreas. Some other kinds of exocrine cancer that are not common include adenosquamous carcinomas, squamous cell carcinomas, signet ring cell carcinoma, undifferentiated carcinomas and undifferentiated carcinomas with a giant cell.
- Endocrine tumors - It develops in the endocrine cells that produce hormones. It is the rare type of pancreatic cancer.
Numerous studies suggest that the risk of developing pancreatic cancer is twice in smokers as compared to the non-smokers. Pancreatic cancer is one of the most frequent cancer and thousands of people are diagnosed with pancreatic cancer each year. Cigarette smoking is the number one cause of the development of pancreatic cancer.
The incidence of the development of cancer is increasing at a high rate. One cannot completely prevent the occurrence of cancer but some preventive steps can be taken to reduce the risk of developing it.
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