<prompt> Most common urinary tumour in children isRhabdomyosarcomaLeomyomaWilms tumourNephrogenic rests  <response>: Wilms tumour 2143 -Nelson 18th 591-Ghai 7th1. Rhabdomyosarcoma is the most common soft tissue sarcoma in children 15 years MC site head neck region2. Wilm s tumor or nephroblastoma is the most common malignant tumour of the kidney Under 5years of age3. Neuroblastoma is the most common intra- abdominal solid tumor in childhood Before 6 years of age4. Retinoblastoma is the most common primary ocular tumor of childhood White reflex is MC sign Wilms tumour associated with syndrome - WAGR, Denys- Drash, Backwith - Wiedemann syndrome others hemihypertrophy sporadic aniridia, neurofibromatosis Von Recklinghausen disease and Von Wille brand diseaseGenitourinary anomalies most commonly associated Wilms tumour are hypoplasia, fusion and ectopia of the kidney, duplications of collecting systems, hypospadias and cryptorchildism 