Cardiac metastasis from colorectal cancer: A case report

Figure 1 Transthoracic echocardiography. A: A mobile, round, spherical, and echogenic mass (white arrows) is seen adjacent to the lateral right atrial wall on an apical four chamber view of the transthoracic echocardiography; B: A magnified image of the right atrial mass shows a pedunculated character with a broad stalk (tris-arrows). RA: Right atrium; LA: Left atrium; LV: Left ventricle.

Figure 2 Computed tomography scan revealed that the mass (arrow) was located in the right atrium, obstructing the tricuspid valve opening.

Figure 3 Operative finding. On opening the right atrium, a large multiple lobulating mass (arrow) with a rough surface was located on the antero-inferior side of the right atrial free wall. The mass was near the atrioventricular groove, with invasion into the right atrium.

Figure 4 Microscopic findings. A: Tall malignant columnar cells line large irregular glands; some forming a cribriform architecture containing intraluminal necrotic debris in primary colon cancer (HE, × 100); B: The cardiac mass shows similar histological findings to Figure 4A.