Bilateral Wilms Tumor
Synchronous
Metachronous
NWTS-1
33/606 (5.4%)
20/606 (3.3%)
NWTS-2 and 3 145/3300 (4.4%)
St. Jude
29/328 (8.8%)
7/328 (2.1%)
SIOP 1, 2, 5
42/1043 (4.0%)
25/1043 (2.4%)