Mesoblastic nephroma, also known as fetal mesenchymal hamartoma or leiomyomatous hamartoma, is predominantly seen in infancy.

• 摘要中胚层肾瘤，或者被称为胎儿间叶缺陷瘤或是平滑肌缺陷瘤，主要发现在幼儿时期。