High 18F-fluorodeoxyglucose uptake in cardiac tumor

Figure 1. Chest contrast computed tomography demonstrated a 14 cm × 11 cm solid mass in the right heart, with uneven density, and irregular and obscure edges. The computed tomography number (CTN) in plain scan ranged 23 to 29 HU (A), and that in enhanced scan ranged 34 to 72 HU in the arterial phase (B), 38 to 86 HU in the venous phase (C), and 48 to 102 HU in the lag phase (D). CTN = computed tomography number.

Figure 2. (A) Echocardiography revealed a medium echogenic mass in the right ventricle with a rich blood flow signal; its largest thickness was 6.2 cm, and it occupied the right ventricular outflow tract. (B) The second echocardiography revealed that the largest thickness of the mass reached 7.3 cm in just 20 days. (C) FDG PET/CT imaging revealed significantly increased FDG uptake in the right heart. The maximal standardized uptake value (SUVmax) of the right cardiac lesion was 17.2; (D) abnormal glucose uptakes were observed in the mediastinal lymph node and the right hilar lymph node, the SUVmax of which was 12.9. FDG PET/CT = fluorodeoxyglucose position emission tomography and computed tomography, SUVmax = maximum standardized uptake value.