Long term cough

Regular smoker since 4 years . From the past 6 months I am having occasional cough , which test can detect the early symptoms of lung cancer ?
Also, is bronchoscopy helpful or is there some effective way to clean lungs and get rid of that tar because I am quitting smoking and need to be cleaned ?
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Doctor Answers (1) on Long term cough

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Dr. Sachin Mumbai | Pulmonologist
There no way u can clear tar if u stop smoke the severity of disease will not increae it will stop.broncoscopy good way for dignosis of lung cancer by sending sample for the same.
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