IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-10-11-37887 Original Research Paper TO STUDY THE ROLE OF SEMIRIGID THORACOSCOPY IN THE DIAGNOSIS OF PLEURAL EFFUSION IN SUSPECTED CASES OF LUNG CARCINOMA IN A TERTIARY CARE CENTRE IN NORTH INDIA Pankaj Kumar Singh Dr. November 2021 10 11 01 02