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先天性耳前瘘管的形成与胚胎时外耳的发生是分不开的。外耳在胚胎第一个月时即开始发生;当胚胎发育至11毫米时,在下颌弓和舌弓的边缘上可见到六个含有软骨的小丘状结节,它们均环绕在第一腮沟的周围,大家都认为外耳是由这些结节渐渐融合而成的。融合生长过程中可产生错误的联合而发生不同的外耳畸形。多数学者却认为耳前漏管是第一腮沟的残迹。
Congenital ear fistula formation and the formation of the outer ear when the embryo is inseparable. The outer ear begins to occur on the first month of the embryo; when the embryo develops to 11 mm, six cartilage-containing hillocks are visible on the edges of the mandibular arch and lingual arch, all of which encircle the first gullet Around, we all think that the outer ear is formed by the gradual integration of these nodules. Diffusion of the outer ear deformity can occur due to false associations that can occur during the fusion process. Most scholars believe that the ear canal leak is the remnants of the first gullet.