鼻背中线瘘管为一先天性疾病,乃因胚胎发育过程中两侧内侧鼻突与额鼻突融合形成外鼻时胚层组织残留所致。我们曾遇1例貌似一额外“前鼻孔”的鼻背中线瘘管。介绍如下。 女,13岁,学生。出生后即发现右侧鼻孔上方突出如玉米粒大小的肿块,其前端有一小孔,肿块随年龄增长而长大,在寒冷季节有时流出粘液样分泌物。1982年12月来我院就诊。局部检查:右侧鼻 Nose dorsal midline fistula as a congenital disease, because the embryonic development of both sides of the nasal process and frontal nasal process to form nasal outer nasal germ layer caused by residual tissue. We have encountered 1 case of a median nasal fistula that looks like an extra “anterior nostril.” Introduced as follows. Female, 13 years old, student. After birth that the top of the right nostril, such as the size of corn particles prominent mass, the front of a small hole, the mass grew up with age, sometimes in the cold season out of mucus-like secretions. 1982 December came to our hospital. Local examination: the right nose