| BRONCHOGENIC CARCINOMA :A number of benign | | | | chronic granulomatous inflammation in |
| and malignant tumours occur in the lungs but | | | | humans.the causative agent is tubercle |
| the primary lung cancer, commonly termed | | | | bacillus or Koch�s bacillus called |
| bronchogenic carcinoma, is the most common. | | | | Mycobacterium tuberculousis causes |
| The lung is also the commonest site for | | | | tuberculosis in the lung and other tissues of |
| metastasis from carcinomas and sarcomas. A | | | | the human body. The organism is a strict |
| histologic classification of various benign | | | | aerobe and thrives best in tissues with |
| and malignant tumours of lungs as recommended | | | | oxygen tension like in the apex of the |
| by the World Health OrganisationIt is the | | | | lung.Mode Of Transmission1. Inhalation of |
| most common primary malignant tumour in men | | | | organisms present in fresh cough droplets or |
| inindustrialised nations and accounts for | | | | in dried sputum form an open case of |
| nearly one-third of all cancer deaths in | | | | pulmonary tuberculosis.2. Ingestion of the |
| both sexes. Currently, the incidence in | | | | organisms leads to development of tonsillar |
| females in the United States has already | | | | or intestinal tuberculosis. This mode of |
| exceeded breast cancer as a cause of death in | | | | infection of human tubercle bacilli is from |
| women. Cancer of the lung is a disease of | | | | self-swallowing of infected sputum of an open |
| middle and late life with peak incidence in | | | | case of pulmonary tuberculosis, or ingestion |
| 5th to 7th decades, after which there is | | | | of bovine tubercle bacilli from milk of |
| gradual fall in its | | | | diseased cows.3. Inoculation of the organisms |
| incidence.ETIOPATHOGENESIS1. Smoking2. | | | | into the skin may rarely occur from infected |
| Atmospheric pollution3. Occupational causes4. | | | | postmorten tissue.The author is the owner of |
| Dietary factors5. Genetic factors6. Chronic | | | | a Successful Weight loss program. Also the |
| ScarringTUBERCULOSISTissue response in | | | | author maintains a blog on General Medicine. |
| tuberculosis represents classical example of | | | | |