Abstract
Botryoid growth pattern (BGP) is a polypoid mass growing into the renal
pelvis, rarely seen in bilateral Wilms tumors (BWT) where it represents
a surgical challenge. We report our experience of nephron sparing
surgery (NSS) in three patients with BGP in BWT. Surgical en-bloc
removal was performed after calyx opening with no complications. The
histology of the BGP was Intra Lobar Nephrogenic Rest in all cases while
all Wilms tumors were of intermediate risk. One patient early recurred.
At a follow-up of 9 months, 22 and 23 years, all patients were alive
with a moderate renal insufficiency and hypertension.