Tumours of the lung
WHAT IS TUMOUR OF THE LUNG?
A number of benign and malignant tumours occur in the lungs but primary lung cancer commonly termed bronchogenic carcinoma is the most common. The lung is also the commonest site for metastatsis from carcinoma and sarcomas. A histologic classification of various benign and maliganant tumours of the lung are present.
WHAT IS BRONCHOGENIC CARCINOMA?
The term bronchogenic carcinoma is commonly used for cancer of the lungs which includes carcinomonas arising from the respiratory epithelium lining of the bronchi , the bronchioles and alveoli.
WHAT ARE CLASSIFICATION OF LUNG CANCER?
Lung cancer is the most common primary malignant tumour in men and accounts nearly 30% of all the cancer deaths in both sexes in the developing countries. Currently the incidence of lung cancer in females in the UNITED STATES has alresdy exceeded breast cancer as a cause of death in women. Cancer of the lung is a disease of the middle and late life with peak incidence. Of late there has been slight decline in the lung cancer deaths in males due to smoking cessation efforts which started in the males in the west 4 decades back and has started yielding results. However worldwide the scene on its incidence and prognosis are quite grim. Cancer estimate that worldwide by the year 2030 there would be about 10 million deaths per year from lung cancer.
WHAT IS THE CAUSE OF LUNG CANCER?
- Smoking: the most important factor for high incidence of all the forms of bronchogenic carcinoma is tobacco smoking. A number of evidences support the positive relationship of lung cancer with tobacco smoking:
i. Total dose: there is adirect statistical correlation between death rate from lung cancer and the total and the amount of cigrattes smoked. Eg:
An average regular smoker has 10 times greater risk of developing lung cancer than a non smoker.
The risk of smokers of more than 2 packs per day fro 20 years is 60-70 times greater than a non smoker.
THATS ALL ABOUT LEARN ABOUT TUMOURS OF THE LUNG.