<prompt> Which of the following is false regarding Wilms tumor?May be associated with aniridiaAssociated with beckwith-wiedemann syndromeMay be associated with deletion of WT1 or WT2 genePeak incidence is below the age of 1 year  <response>: Peak incidence is between 1-5 years. It usually persents as an asymptomatic flank or upper abdominal mass. Ref: Schwaz - Principles of Surgery, 7th Edition, Page 551. 