Epicardial metastasis of rectal neuroendocrine tumour.

Figure 1: (A and B) Neuroendocrine tumour of the rectum (arrows). (C and D) A positron emission tomography showing an epicardial mass (arrows). The mass separated from the myocardium (arrow head). (E) A positron emission tomography—magnetic resonance image showing the epicardial mass. Figure 2: Surgical finding of the epicardial lesion (A) and a section of the mass (B). The mass size was 4 × 3 × 3 cm. Neuroendocrine tumour of the rectum (C). There is a neuroendocrine tumour with trabecular growth pattern in the submucosa (H&E, ×100). Neuroendocrine tumour of the epicardium (D). The tumour cells show the same microscopic findings as the neuroendocrine tumour of the rectum (H&E, ×100). LV: left ventricle, H&E: haematoxylin-eosin.