Metanephric adenoma (MA) of the kidney is an uncommon benign epithelial tum
or of the kidney that presents at any age. The histology of the lesion is w
ell established, but the imaging findings have been described in only a few
cases. We report the sonographic and computed tomographic appearance of MA
in a 9-year-old girl to increase awareness among radiologists of this enti
ty. Its recognition may facilitate nephron-sparing surgery.