In which population is nephroblastoma (Wilms' tumor) most commonly found?

Nephroblastoma, commonly known as Wilms' tumor, is predominantly found in children, particularly those between the ages of 2 and 5 years. This tumor is a type of kidney cancer that primarily affects pediatric patients, making it one of the most common kidney cancers in this age group.

The higher incidence in children is attributed to the embryonic origin of the tumor, as it arises from nephric tissue that is involved in the development of the kidneys during fetal life. Most cases are diagnosed before the age of six, and it is extremely rare in adults or the elderly.

Infants may also be affected, but the peak incidence clearly highlights the childhood population as the most typical demographic. Therefore, identifying children as the primary group affected by nephroblastoma aligns with epidemiological data and clinical observations regarding the age distribution of this tumor.