Journal of Clinical Oncology, Vol 7, 310-315, Copyright © 1989 by American Society of Clinical Oncology
Bilateral Wilms' tumor: long-term survival and some epidemiological features
MJ Coppes, J de Kraker, PJ van Dijken, HJ Perry, JF Delemarre, MF Tournade, J Lemerle and PA Voute
Netherlands Cancer Foundation, Utrecht.
Sixty-seven children with a bilateral Wilms' tumor (BWT) who were
registered to the International Society of Pediatric Oncology (SIOP)
nephroblastoma trial and studies 1, 2, and 5, conducted between 1971 and
1980, were analyzed. The overall 10-year survival was 64%. While most
deaths due to tumor occurred within 3 years after diagnosis of bilateral
disease, five patients died after 3 years (20%), three with synchronous and
two with metachronous BWT. The survival rates for the 42 children with
synchronous BWT (follow-up time, 6 1/2 to 14 years) and the 25 children
with metachronous BWT (follow-up time, 5 to 13 years) were 69% and 56%,
respectively. Due to an improvement in the synchronous group, overall
survival improved over the years: 47%, 72%, and 70%, in SIOP 1, 2, and 5,
respectively. Age at diagnosis and most advanced tumor stage affected
prognosis. Children presenting a tumor manifestation before the age of 2
years had better prognosis than older children. This difference is
significant in synchronous BWT. Prognosis for children with local stage 1
or 2 was better than for those with local stage 3. Median age at initial
presentation in BWT was lower than in unilateral nephroblastoma and lower
in metachronous BWT than in synchronous BWT. Young children presenting with
unilateral nephroblastoma should have a careful follow-up of the
contralateral kidney for at least the next 3 1/2 years, as most
contralateral tumors will develop during this period.