1. Tissue Characterization of an Unusual Right Atrial Mass by Magnetic Resonance Imaging 
ISHIK C. TUNA, M.D. 
Mayo Clinic Proceedings 
Volume 66, Issue 5, Pages (May 1991)
DOI: /S (12)
Copyright © 1991 Mayo Foundation for Medical Education and Research Terms and Conditions

2. Fig. 1
Transthoracic two-dimensional echocardiogram, four-chamber view (apex-down orientation) in 70-year-old man with right atrial mass (arrows). Attachment site of mass is not depicted. LA = left atrium; LV = left ventricle; RV = right ventricle.
Mayo Clinic Proceedings  , DOI: ( /S (12) )
Copyright © 1991 Mayo Foundation for Medical Education and Research Terms and Conditions

3. Fig. 2
Magnetic resonance images of heart in 70-year-old man with intracardiac mass. A, T1-weighted spin-echo examination in transverse orientation, demonstrating a mass (X) that filled the right atrium. Note attachment to posterior wall of right atrium. Mass and mediastinal fat (arrow) have similar signal intensities. B, T2-weighted image (30-ms echo time), transverse section at a level comparable to A, demonstrating changes in signal intensity of identical degree in mediastinal fat and intracardiac mass. C, T2-weighted image (60-ms echo time), transverse section at a level comparable to A, again demonstrating identical changes in signal intensity in mediastinal fat and intracardiac mass.
Mayo Clinic Proceedings  , DOI: ( /S (12) )
Copyright © 1991 Mayo Foundation for Medical Education and Research Terms and Conditions

4. Fig. 3
Intraoperative appearance of right atrial mass. Smooth, yellow, 6-cm mass was attached posteriorly to right atrial wall.
Mayo Clinic Proceedings  , DOI: ( /S (12) )
Copyright © 1991 Mayo Foundation for Medical Education and Research Terms and Conditions

5. Fig. 4
A, Photograph of bisected right atrial lipoma. Site of attachment to right atrial endocardium is shown (arrows). Cut surface (left) was uniformly smooth and yellow. B, Microscopic appearance of right atrial mass. Mature adipocytes were present, with no intermingled cardiac muscle fibers identified. (Hematoxylin-eosin; ×25.)
Mayo Clinic Proceedings  , DOI: ( /S (12) )
Copyright © 1991 Mayo Foundation for Medical Education and Research Terms and Conditions