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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A child with an abdominal mass diagnosed of having Wilms tumour. The child may have all of the following features associated with Wilms tumour, EXCEPT:
assistant
The correct answer is  Horseshoe kidney is associated with Wilms tumor not bilateral polycystic kidney. In a few children, Wilms tumor occurs in the setting of associated malformations or syndromes, including, Aniridia Hemihyperophy Genitourinary malformations Cryptorchidism Hypospadias Gonadal dysgenesis Pseudohermaphroditism Horseshoe kidney Beck-with-Wiedemann syndrome Denys-Drash syndrome WAGR syndrome (Wilms tumor, aniridia, ambiguous genitalia, mental retardation) Ref: Graham D.K., Quinones R.R., Keating A.K., Maloney K., Foreman N.K., Giller R.H., Greffe B.S. (2012). Chapter 31. Neoplastic Disease. In W.W. Hay, Jr., M.J. Levin, R.R. Deterding, J.J. Ross, J.M. Sondheimer (Eds), CURRENT Diagnosis & Treatment: Pediatrics, 21e.