Cardiac Metastasis In A Patient With Poorly-differentiated Neuroendorcrine Tumor: 18F-FDG PET-CT Finding

Abstract

1 ISSN 1755-5191 We describe 18F-FDG positon emission tomography-computed tomography findings of a 67 y old male patient, followed since 2014 for poorly differentiated NETs with unknown primary tumor. PET-CT showed cardiac hypermetabolism in the left ventricular as muscular metastasis in addition to other muscular metastases of the two diaphragmatic pillars and the left iliopsoas muscle (FIGURE 1). Cardiac USN and chest-CT (FIGURES 2 & 3) confirmed our diagnostic by showing a small lesion in the cardiac apex measuring 13.7 × 18 mm. Myocardial metastases are very rare with a reported incidence up to 1 to 4% [1]. 18F-FDG is a positron emission tomography tracer for poorly differentiated NETs with KI67>20% [2]. This modality of exploration is useful for the staging and the restaging patients. The maximum detection was correlated to a low somatostatin receptor (SSRT) expression unlike well-differentiated tumors that show great expression of these receptors [3]. Cardiac metastasis in a patient with poorly-differentiated neuroendorcrine tumor: 18F-FDG PET-CT finding