Key result
Organized LAA thrombus in MS mimics myxoma neovascularization on cardiac MRI and coronary angiography.
Why the study?
Preoperative differentiation of left atrial thrombus from myxoma is important but challenging due to overlapping clinical and echocardiographic features.
Case Report (n=1)
Organized left atrial thrombi can exhibit dense neovascularization and CMR features that mimic atrial myxomas, complicating preoperative diagnosis.
Case cautions against sole reliance on CMR/angiography for LAA mass differentiation; leaves open need for validated multimodal criteria.
The preoperative differentiation of a thrombus from a myxoma is important but not always easy. Clinical and echocardiographic characteristics of myxoma and thrombi are not diverse enough to always reliably distinguish the two. We report the case of a patient who was found to have a left atrial appendage thrombus that was misdiagnosed as a myxoma on the basis of its imaging characteristics on cardiac magnetic resonance in addition to the detection of dense neovascularization on coronary angiography. This case highlights the unusual features of an organized thrombus that can mimic many of the distinguishing characteristics of a myxoma.
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Kodali et al. (2010) conducted a case report in Left atrial appendage thrombus and mitral stenosis (n=1). Diagnostic imaging (cardiac magnetic resonance and coronary angiography) was evaluated on Differentiation of thrombus from myxoma. An organized left atrial appendage thrombus in a patient with mitral stenosis mimicked the imaging characteristics and dense neovascularization of a myxoma on cardiac MRI and coronary angiography.
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