Fig. 2.

Im: Case no.2: Poorly differentiated adenocarcinoma of the colon, metastatic to the right atrium - Imaging a - Contrast enhanced CT axial section demonstrating a large right atrium mass (red arrows). The mass protrudes into the IVC (asterisks). b – Fused positron emission tomography CT image, axial section, the right atrium mass is highlighted by fluorodeoxyglucose uptake consistent with metabolic activity (red arrow). c – Contrast enhanced CT axial section demonstrating a non-enhancing right atrium mass filling the entire right atrium (red arrows). d – Contrast enhanced CT coronal section showing the large right atrium mass (red arrows) protruding into the superior vena cava (red asterisks). Fig. 2 H: Case no.2: Poorly differentiated adenocarcinoma of the colon, metastatic to the right atrium - Histology. a - Cardiac muscle is seen in the upper part, infiltrate by carcinoma growing in solid to vaguely glandular pattern, seen in the lower part. The cardiac cells show enlarged reactive nuclei and are surrounded by inflammatory infiltrate, HE X100. b – Poorly differentiated carcinoma, HE X400. c – Carcinoma invading into the pericardial adipose tissue, HE X 200. d – Vascular invasion of carcinoma into a small cardiac blood vessel (thin long arrow), HE X400