J Cardiovasc Ultrasound.  2010 Jun;18(2):58-61. 10.4250/jcu.2010.18.2.58.

A Case of a Right Atrial and Inferior Vena Caval Thrombus Resembling a Right Atrial Myxoma

• Cho HJ
• Seol SH
• Choi BJ
• Park SH
• Kim DK
• Kim U
• Yang TH
• Kim DK
• Kim DI
• Kim DS

• KMID: 2135440
• DOI: http://doi.org/10.4250/jcu.2010.18.2.58

Abstract

A right atrial and inferior vena caval thrombus in a structurally normal heart is a very rare condition. We report a case of such a thrombus in a 66-year-old woman. She was admitted to our hospital with recent onset dyspnea. Based on echocardiography, we suspected that she had myxoma. We performed an excision of a mass, which was found, by pathologic examination, to be an organized mural thrombus.

Keyword

Thrombi; Myxoma; Right atrium; Inferior vena cava

MeSH Terms

Aged
Dyspnea
Echocardiography
Female
Heart
Heart Atria
Humans
Myxoma
Thrombosis
Vena Cava, Inferior

Figure

• 

  Fig. 1 Subcostal view of an echocardiogram shows a normal inferior vena cava and normal right atrium structures four years ago.

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  Fig. 2 Subcostal view of an echocardiogram shows two round masses having echolucent areas in the right atrium and dilated inferior vena cava (A). A transesophageal echocardiogram shows a mass with a stalk in the lower part of the right atrium (B).

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  Fig. 3 A chest computed tomogram reveals two well-defined masses in the right atrium and inferior vena cava (arrows).

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  Fig. 4 Smooth-surfaced round masses were observed.

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  Fig. 5 The thrombus, which consists of platelets and fibrin with entrapped blood cells, is surrounded by fibrous tissue (arrow) (×100) (A). Arborizing vessels and fibroblasts are seen at the edge of the thrombus (arrow) (×400) (B).

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