[Abscess of the mitral annulus mimicking left atrial tumour -- case report].

A case of a 50-year-old female with hypertension and diabetes, admitted to the hospital due to echocardiographically detected left atrial tumour, is presented. Differential diagnosis included thrombus, myxoma and infectious tumour. The patient underwent surgery. Histopathological examination revealed the presence of an abscess in the left atrium. This report underlines the difficulties in the diagnosis of cardiac tumours.