require best procedure for plurosis leading to tuberculosis first time

My mother was suffering from coughing since last 15 days was later diagnosed as right lung plurosis at the age of 68 yrs.removed 800 ml water from lung 3 days back. 2d echo of heart is ok. Ct scan of right is shown growth but that nonmalignamt. Sputum test is negative but MT test is positive. Doctor started TB treatment . pl advise what to do.