Is Nephron Sparing Surgery Justified in Wilms Tumor With Beckwith-Wiedemann Syndrome or Isolated Hemihypertrophy?

Background Patients with Beckwith–Wiedemann syndrome (BWS) or isolated hemihypertrophy (HH) treated for a Wilms tumor (WT) carry an increased risk of developing metachronous lesion. There are no guidelines on precise indications for nephron sparing surgery (NSS) in unilateral WT (UWT). The objective of this retrospective study was to delineate the indications of NSS in patients with BWS/HH treated for WT and to evaluate their outcome. Procedure All cases of BWS/HH treated for a WT according to SIOP protocols from 1980 to 2013 were reviewed. Patients were divided into two groups (G): isolated UWT (G1) and bilateral lesions (G2) with two subgroups: bilateral tumors suspected of malignancy (G2…