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Pathological Case of the Month

Jeanne Ackerman, MD; Peter McKeown, MD; Sivaselvi Gunasekaran, MD; Diane Spicer
Arch Pediatr Adolesc Med. 1995;149(2):199-200. doi:10.1001/archpedi.1995.02170140081014.
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A 20-YEAR-OLD asymptomatic pregnant woman demonstrated inverted T waves on a routine electrocardiogram performed during a workup for a biopsy of the breast. An echocardiogram showed a large left ventricular mass. Subsequent magnetic resonance imaging revealed a posterior left ventricular tumor involving a portion of the myocardium but with good ventricular function (Figure 1). The patient remained asymptomatic but was noted to have ventricular ectopia on a Holter monitor. She was given a β-blocker. No significant change was seen on serial examinations. Five months after delivery of a healthy newborn, the patient underwent open heart surgery and enucleation of a 9.5×5.5-cm mass involving most of the free wall of the left ventricle (Figure 2). The mass was well circumscribed within the muscle and weighed 110 g. Her postoperative course was uneventful and she was discharged on the fourth postoperative day. The magnetic resonance image is shown in Figure 1. The

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