Final answer:
Childhood renal carcinoma is also known as Wilms tumor.
Step-by-step explanation:
Childhood renal carcinoma is also known as Wilms tumor. The other options listed are different conditions related to kidney disorders, but Wilms tumor specifically refers to a type of childhood kidney cancer. It is most commonly diagnosed in children aged 3 to 4 years old and is characterized by the development of a tumor in one or both kidneys.