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作者对5例先天性肾积水输尿管狭窄段的平滑肌进行了透射电镜观察,结果表明该狭窄段的平滑肌细胞内缺少肌微丝、致密体和质膜上的密斑。这些结构是输尿管平滑肌细胞收缩功能的结构基础,缺少
The author of 5 cases of congenital hydronephrosis ureteral stricture smooth muscle was observed by transmission electron microscopy, the results show that the narrow section of the smooth muscle cells in the muscle microfilament, dense body and the plasma membrane of the spot. These structures are the structural basis of the contractile function of the smooth muscle cells of the ureter, lacking