Fig. 1

Initial diagnostic evaluation. Pre-treatment computed tomography (CT) scan showing the cardiac tumor (a). Positron emission tomography-computed tomography (PET-CT) scan showing abnormal uptake of fluorodeoxyglucose in the right ventricular mass (SUV max; 5.4) (b) and the transverse colon (SUV max; 4.4) (c). Endoscopic view of the primary lesion in the transverse colon (d) and the biopsy specimen showing well-differentiated adenocarcinoma (e). Cardiac magnetic resonance imaging (MRI; T1-weighted image, sagittal view) showing the irregular 54 × 32 mm mass, which had nearly equal intensity to the intact myocardium (f). The tumor is heterogeneous and characterized by a ring enhancement (g). MRI (long-axis view of the right ventricle) showing the tumor location lateral to the outflow tract of the right ventricle (h)