<prompt> Which among the following is the least common symptom of Wilms tumour?HaematuriaMass abdomenPainFever  <response>: After neuroblastoma, Wilms tumor is the second most common abdominal tumor in children. Symptoms consist of abdominal enlargement in 60; pain in 20; hematuria in 15; malaise, weakness, anorexia, and weight loss in 10; and fever in 3. Hypeension is noted in over half of patients. Ref: Albanese C.T., Sylvester K.G. 2010. Chapter 43. Pediatric Surgery. In G.M. Dohey Ed, CURRENT Diagnosis Treatment: Surgery, 13e. 