其中结合型17例，无肛合并肠神经元异常9例，神经节细胞未成熟3例，神经节细胞减少1例，神经元发育异常2例。
Among them, 17 were combining type, 9 imperforate anus associated with intestinal neuronal dysplasia, 3 immaturity of ganglion cells, 1 hypoganglionosis, 2 neuronal hypogenesis.
在发育过程中，口凹是在第三期无节幼虫时内陷形成，而原肛是在第六期无节幼虫时内陷形成的，所以口凹的发生早于原肛的发生。
In the course of development, the invagination of stomodeum occurs earlier than that of proctodeum at the third and the sixth nauplius stages respectively.
在发育过程中，口凹是在第三期无节幼虫时内陷形成，而原肛是在第六期无节幼虫时内陷形成的，所以口凹的发生早于原肛的发生。
In the course of development, the invagination of stomodeum occurs earlier than that of proctodeum at the third and the sixth nauplius stages respectively.
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