Radiological reasoning: Right atrial mass.
OBJECTIVE
An older man with a history of urothelial cancer presented with an incidental right atrial mass. Cardiac MRI showed a pedunculated right atrial mass that was homogeneous and of intermediate signal intensity on T1- and T2-weighted images. No signal drop-out was seen on fat-suppressed images. The mass did not exhibit enhancement on the first-pass perfusion and delayed contrast-enhanced images.


CONCLUSIONS
A myxoma is the most common benign primary intracavitary cardiac mass. Although the MRI features are not pathognomonic, certain features such as location, presence of a stalk, and noninfiltrating nature may help to distinguish a myxoma from other intracavitary masses such as a thrombus, metastases, and primary cardiac malignancy. The final pathologic diagnosis was a right atrial myxoma.
Attili
Anil K
AK
Department of Radiology, University of Michigan, 1500 E Medical Center Dr., Ann Arbor, MI 48109, USA. aattili@umich.edu
Gebker
Rolf
R
Cascade
Philip N
PN
D000368:Aged; D006325:Heart Atria / Q000473:pathology; D006338:Heart Neoplasms / Q000175:diagnosis*; D006801:Humans; D033162:Incidental Findings; D008279:Magnetic Resonance Imaging; D008297:Male; D009232:Myxoma / Q000175:diagnosis*; D001749:Urinary Bladder Neoplasms / Q000175:diagnosis