Acute acalculous cholecystitis is a virulent disease that occurs most
commonly in critically ill patients. Imaging studies may facilitate ea
rlier diagnosis and may decrease the morbidity and mortality rates. Th
e authors report on a 30-month-old child with acute acalculous cholecy
stitis after surgical repair of tetralogy of Fallot. A review of the c
linical pathogenesis, diagnosis, and treatment is included.