Title: Variability of the round window niche entry in children and adults

标题：儿童与成人的圆窗龛入口变异性

Content/内容：

1) The round window niche entry (fossula fenestrae cochleae, fossula fenestrae rotundae) is one of the main structures in the labyrinthine wall of the tympanic cavity.

圆窗龛入口（耳迷路小窝窗、圆顶小窝窗）是鼓室腔迷路壁的主要结构之一。

2) Its variability is fairly significant and very important in otosurgery.

其变异性相当明显，在耳手术中十分重要。

3) In order to learn more about the morphology of the round window niche entry, a microanatomical study on 100 temporal bones obtained from cadavers aged 0 - 71 y. was performed.

为了深入了解圆窗龛入口的形态学，显微解剖分析100例0~71岁尸体颞骨标本。

4) Five morphological forms of the round window niche entry were differentiated: triangular, semicircular, ovally horizontal, ovally vertical and round ones.

共鉴别出5种圆窗龛入口形态：三角形、半圆形、水平卵圆形、竖卵圆形及圆形。

5) Triangular forms were observed only in children of over 4 years of age and round forms almost only in young children, of age below this borderline (the beginning of pneumatization of the temporal bone).

三角形仅见于4岁以上儿童，圆形几乎仅见于颞骨内气腔始形成年龄以下的幼儿。

6) The differences between these two groups were statistically significant.

这两组的差异性具有统计学意义。

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