BACKGROUNDA textiloma is a rare retained surgical swab with probable serious post-operation complications. CASE REPORTHere, we reported an asymptomatic patient who had past history of coronary artery bypass grafting (CABG) fourteen months ago and referred to our institute for left atrial mass removal. Echocardiography and chest computed tomography (CT) scan revealed a non-homogenous non-mobile mass and a heterogeneous lesion with low-density as well as high-density areas with spot calcification and gas bubbles at left atrium level, respectively. CONCLUSIONDespite being rare after CABG, textiloma should be considered in the differential diagnosis in case of any suspicious chest mass even in asymptomatic patients.