The renal tumour which has multicentric origin -

Ans. is 'a' i.e., Wilm's tumor Wilms tumor o Wilms tumor is the most common primary renal tumor of childhood. o Usual age for diagnosis is 2-5 years. o Approximately 5% to 10% of Wilms tumors involve both kidney, either simultaneously or one after the other. o Nephrogenic rests are the precursor lesions of Wilms Tumor. o Most children with wilms tumors present with a large abdominal mass. o Less common presentations are hematuria, abdominal pain, intestinal obustruction, and hypeension. o "10% of Wilms tumors are either bilateral or multicentric at the time of diagnosis". - Robbin's