Nephroblastoma, derived from embryonic renal tissue, comprise undifferentiated blastemal cells, differentiated epithelial cells and stromal cells. There are similarities between histology of the tumor and embryonic nephrogenesis. 肾母细胞瘤作为肾胚胎发生的肿瘤其组织学结构与起源组织胚胎期结构有相似之处,由间叶组织细胞、上皮样细胞和幼稚的胚基细胞三种成分构成。