There is an ill-defined soft tissue mass almost entirely occupying the left atrium, crossing the interatrial septum into the left atrium and also appearing to protrude into the proximal inferior vena cava. It is of relatively homogenous hypoattenuation. No significant enhancement, no evidence of central necrosis or calcifications.
There is also a moderate pericardial effusion measuring up to 4 cm in depth and collected predominantly along the inferior cardiac borders; it is uncertain if there is non-enhancing solid tissue within the pericardial space.
The origin of the left inferior pulmonary vein is mildly narrowed. The right coronary artery posterolateral branch also appears encased by soft tissue.
A couple of small non-specific nodules and linear atelectasis in the left lower lobe. Lungs are otherwise clear. No pleural effusions. No bony suspicious abnormalities.
Abdomen and pelvis: Liver, spleen, adrenal glands, pancreas, and kidneys are unremarkable in appearances. No nodal enlargement. Bowels are unremarkable, with no evidence of dilation. No free fluid or free gas. No bony suspicious abnormalities.
Conclusion: Features are those of a cardiac mass centred in the left atrium, crossing the interatrial septum into the right atrium with pericardial effusion and IVC extension. Findings are not classic for atrial myxoma; sarcoma, metastasis, lymphoma +/- thrombus need to be considered.