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