Introduction: The most common left ventricular (LV) mass is thrombus.1 It is important to differentiate LV thrombus from common benign tumors; myxomas, papillary fibroelastoms and lipomas but also some rare tumors; rhabdomyomas and fibromas or malignant cardiac sarcoma.2,3 Case report: 59-year-old male patient presented with intermittent chest pain and worsening shortness of breath and orthopnea. Four years ago he had myocardial infarction of the anteroseptal region with remaining hypokinesia of the apical anterior wall and apex dilatation. Transthoracic echocardiography showed estimated left ventricular ejection fraction 48%, hypokinesia of the apical anterior wall and apex dilatation with homogeneous mass visualized on apical part of the lateral left ventricular wall and it was difficult to differentiate a thrombus from LV tumor. 4D transesophageal echocardiography was preformed and it showed LV mass measuring 1.5cm×1.9cm attached to the apical part of the lateral left ventricular wall on two sides that resembled a pedunculated tumor (Figure 1 and Figure 2). It was homogenous and noncalcified, nonmobile with echodensity similar to the myocardium. On cardiac computed tomography (CT) LV mass showed features of benign tumor (size < 5cm, single lesion, pedunculated, with absent enhancement, with smooth, well-defined margines, with no signs of invasion, metastasis, pericardial effusion or calcification), most probably a fibroma (Figure 3). Significant coronary artery stenoses were excluded on ct coronarography.With chronic therapy correction and optimal heart failure therapy patient was asymptomatic. On repeted transesophageal echocardiography during 6 months period LV mass remained the same size. Patient was examined by cardiac surgeon and follow up was recommended, considering unchanged size and echocardiographic and CT features of the tumor, surgical treatment was not indicated. Cardiac magnetic resonance imaging (MR) is planned to confirm the diagnosis. Conclusion: Echocardiography is an important tool in intracardiac mass evaluation and identification of the LV mass size, shape, mobility and attachment is important do differentiate LV thrombus from tumors. An intracardiac mass should be assessed in multiple views, both during systole and diastole. Cardiac MR or CT should be used to confirm the diagnosis.