We present a 14-year-old female with a massive aneurysm of the pulmonary tr
unk occurring secondary to bacterial endocarditis of the patent arterial du
ct. Echo Doppler imaging, magnetic resonance and angiography confirmed the
diagnosis. On intermediate follow-up after surgical correction, the echo st
udies and cardiac catheterization disclosed no residual lesions. The patien
t is now asymptomatic.