PMC6769198_01
MRI showing a solitary and round mass in the right atrium. MRI indicates magnetic resonance imaging; RA, right atrium (the arrow in the figure indicates the RA mass).
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IAS (Figure 1).
(A, B) Surgical view of the blood cyst and floating white mass in the cyst.
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During the resection, the mass was opened and was found to be a blood-filled cyst containing a calcified kernel (Figure 2A and B).
Histological image of the blood cyst.
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Histologically, the mass was a fibrous blood clot with hemosiderin pigment deposition and presence of some fibrin sclerotic nodule and calcification (Figure 3).