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1·Among them, 17 were combining type, 9 imperforate anus associated with intestinal neuronal dysplasia, 3 immaturity of ganglion cells, 1 hypoganglionosis, 2 neuronal hypogenesis.

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。