<prompt> Wilms tumor - most common presenting symptomHaematuriaAsymptomac abdominal massAbdominal painHeadache  <response>: Wilms tumor Nephroblastoma Most common malignant tumor of kidney,80 of tumor present below 5 year of age.Presentation Asymptomac abdominal mass M. C..Haematuria 10-25.Hypertension 25.Abdominal pain 30.Fever 20. 