Nonbacterial thrombotic endocarditis in a child with non-Hodgkin's lymphoma.

The diagnosis of nonbacterial thrombotic endocarditis (NTBE) is rarely made during life. This report describes a child who had high-grade non-Hodgkin's lymphoma with NTBE and multiple systemic embolism. The transthoracic echocardiographic findings of mitral valve leaflet vegetations and progressive regurgitation led to surgical resection of the vegetations. A high index of suspicion is needed when a clinician is faced with a patient who has malignancy, systemic embolic phenomena, and persistent negative blood cultures.