Successful orthotopic heart transplantation was performed in a 38-day-
old child with a fetal echocardiographic diagnosis of a left ventricul
ar mass and in a 40-year-old woman with cardiac murmur since childhood
and an echocardiographic diagnosis of asymmetric septal hypertrophy.
Pathologic examination of the removed hearts, consisting of gross, his
tologic, immunohistochemical and ultrastructural studies, led to the f
inal diagnosis of cardiac fibroma. Both patients were alive and in goo
d condition at 35 and 28 months, respectively, after operation.