Author + information
- Received November 10, 2011
- Accepted November 17, 2011
- Published online June 12, 2012.
A 28-year-old woman experienced traumatic head and bony injuries after falling from her bicycle. An incidental finding on thoracic computed tomography was a 4.2 × 3.3 cm soft tissue mass in the interatrial septum (A, arrows). Transthoracic echocardiography demonstrated a large echolucent mass (B, Online Video 1). Three-dimensional echocardiography confirmed that the lesion was discrete from the aortic root (C).
Cardiac magnetic resonance imaging added tissue characterization. Referenced to myocardium, the mass was mildly hyperintense on a balanced steady-state free precession sequence (D, Online Video 2). The mass was isodense with T1 weighting (E) but markedly hyperintense on a T2-weighted short-tau inversion recovery sequence (F). There was no contrast uptake on first-pass perfusion (Online Video 3) and no late gadolinium enhancement using phase-sensitive inversion recovery (G). Appearances were highly suggestive of a bronchogenic cyst, a rare congenital lesion and remnant from abnormal budding of the embryonic foregut. The patient remains asymptomatic but under active review. AV = aortic valve; LA = left atrium; LV = left ventricle.
- Received November 10, 2011.
- Accepted November 17, 2011.
- American College of Cardiology Foundation