To the Editor.—
Richard O. Friday, MD (226:82, 1973), described the ultrasound B scan as an aid in the diagnosis of pericardial cysts. We wish to point out that lesions appearing cystic by ultrasound B scan may not always be fluid filled.
Report of a Case.—
A 20-year-old white asymptomatic woman was seen in consultation because of an abnormal chest roentgenogram. A smooth, sharply demarcated circumscribed mass measuring 12 cm in diameter was identified at the right anterior aspect of the heart. Fluoroscopic examination showed a narrow pedicle. The mass was not pulsatile. The roentgenographic impression was a pericardial cyst. It was later noted that mediastinal widening was present (Fig 1). An ultrasound B scan examination revealed that the right paracardiac mass had excellent through-transmission at low gain, which exceeded that of the heart. The far border of the mass was smooth and no internal echoes were noted at medium
Cardello FP, McQuown DS, Dollinger M. Ultrasound in Diagnosis of Parapericardial Masses. JAMA. 1974;227(10):1124. doi:10.1001/jama.1974.03230230016012
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