PMC5791493_01
Right atrial mass in four chamber echocardiography
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F1
Coronary artery was found to be normal during cardiac angiography [Figure 1].
Intraoperative view of fibroma
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F2
On inspection of the right atrial cavity, a yellow mass (2.6 cm x 1.6 cm) above the coronary sinus orifice that bulged out to cavity was detected [Figure 2].
Gross pathology of the resected mass
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F3
It had a yellow color, was fragile, not surrounded by any capsule, and was excavated with its underlying endocardium with a small rim of its peripheral septal tissue and endocardial defect repaired by running proline suture [Figure 3].
Fibroblast cells in fascicles with abundant collagen fiber (H and E, x100)
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F4
Histopathologic examination showed that the mass was a fibroma [Figure 4] containing fibroblast cells in fascicles with abundant collagen fibers and no evidence of mitotic figures or malignancy.