Methods: Immunohistochemical analysis of NOS small bowel from fifteen patients with congenital intestinal atresia was compared with ten patients with normal intestine (the control group).

• 方法：应用免疫组化技术检测15例先天性小肠闭锁患儿肠壁内NOS表达情况，并以10例正常小肠标本作为对照。