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Case of the week 07-17 Right Atrial Tumour – or not?

Case of the week 07-17 Right Atrial Tumour – or not?. a. b. History: An incidental mass was identified in the right atrium of a middle aged female on pre-operative trans thoracic echocardiography (image a). CMR requested for further characterization. CMR:

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Case of the week 07-17 Right Atrial Tumour – or not?

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  1. Case of the week 07-17 Right Atrial Tumour – or not? a b History:An incidental mass was identified in the right atrium of a middle aged female on pre-operative trans thoracic echocardiography (image a). CMR requested for further characterization. CMR: The right atrium on 4 chamber (b) has a ‘deep’ AV groove, and a prominent crista terminalis. These combine to mimic tumor. This is confirmed on tissue characterisation: the ‘mass’ is shown to be normal AV groove fat and crista terminalis (TSE and TSE with fat-sat, c and d) However, the scout transaxial HASTE images (Half Fourier Single Shot Turbo (Fast) Spin Echo) show an incidental soft tissue lesion in the periphery of the right lung on transaxial imaging (arrow, image e). Perspective: The apparent mass is identified as a large amount of fat in the AV groove, but CMR reveals a previously unsuspected non cardiac abnormality. Attention should be paid on reporting CMR to the non-cardiac anatomy. d c e John Petersen, Carsten Schmalfuss, Pat Mergo, Gary R. Cooper, CMR Service, University of Florida, Gainesville, FL. USA

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