tag:blogger.com,1999:blog-7843124966888916992024-10-25T02:06:17.011-07:00onlinewikihttp://www.blogger.com/profile/01090087035485785548noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-784312496688891699.post-68022756431925351202011-11-16T09:07:00.000-08:002011-11-16T09:08:22.861-08:00<div dir="ltr" style="text-align: left;" trbidi="on"><div><b><span class="Apple-style-span" style="font-size: large;"><u>Aetiology of bronchial carcinoma</u></span></b></div><div><b><span class="Apple-style-span" style="font-size: large;"><u><br /> </u></span></b></div><b>1, Cigarette smoking (90%):</b><br /> <div><ul style="text-align: left;"><li>Cigarette smoking is the most important causative agent to develop Lung cancer.</li> <li>About 85-90% of lung carcinomas patients are smoker.</li> <li>Directly related to content of Tar in cigarette.</li> </ul><div><div><b>2, Radon gas (5%):</b></div><div><ul style="text-align: left;"><li>Second most common cause is Radon gas exposure.</li> </ul></div><div><b>3, Industrial pollutants:</b></div><div><ul style="text-align: left;"><li>Remaining are due to pollution like industrial pollutants e.g&nbsp;asbestos,.&nbsp;ionizing radiation, &nbsp;cadmioum, chromium, berylium e.t.c.</li> </ul></div><div><b>4, Viral infection:</b></div><div><ul style="text-align: left;"><li>Human papilloma virus ( HPV )</li> <li>Cytomegalovirus ( CMV)</li> </ul></div><div>Lung cancers of non-smoker have better prognosis than smoker.</div><div>Vit D&nbsp;(sunlight)&nbsp;or UVB exposure have preventive effects on lung cancer.</div><div><br /> </div><div><br /> </div><div><br /> <div><br /> </div></div></div></div></div>onlinewikihttp://www.blogger.com/profile/01090087035485785548noreply@blogger.com0