For these years, residua of metanephric blastema and delay of differentiation in the development of kidney have been considered the cause of nephroblastoma.
近年来的研究发现，肾发育过程中的胚基残留，分化障碍可能是肾母细胞瘤发病的原因之一。
2
Objective: The patterns and characteristics about metanephric development and differentiation of Alligator sinensis were explored through observation on the histogenesis of metanephros.