BACKGROUND: Cardiac rhabdomyoma is a very common benign tumor in infan
ts and children. It can be confused clinically with a malignant tumor.
CASE: A 6-year-old girl teas admitted with a chief complaint of breat
hlessness. Chest roentgenography revealed cardiomegaly. Echocardiograp
hy showed a right atrial mass. Intraoperative fine needle aspiration s
howed groups of large, polygonal cells with granular, vacuolated cytop
lasm. Rarely were intranuclear inclusions observed. CONCLUSION: The cy
tologic findings were characteristic of rhabdomyoma.