Background. There is recent evidence to suggest that extremely low bir
th weight is associated with the occurrence of hepatoblastoma. Procedu
re. In light of this possibility, Lye evaluated trends in hepatoblasto
ma incidence in the United States among children age 4 years and young
er. Results. We found an increasing trend (5.2%) in hepatoblastoma inc
idence over the past two decades, a period that corresponds with impro
ved survival of very low birth weight children. Conclusion. Future stu
dies of hepatoblastoma that incorporate birth weight are appropriate.
(C) 1998 Wiley-Liss, Inc.