维生素A缺乏病伴结膜干燥症
Vitamin A deficiency with conjunctival xerosis
- 上级条目
- 5B55 维生素A缺乏
- 层级
- 5 级
定义
结膜干燥症时，结膜上皮由正常的柱状变为复层鳞状，导致杯状细胞丢失，颗粒细胞层形成，表面角化。临床上，这些变化表现为明显的干燥或不适感，受累部位表面粗糙，表面有细小的液滴或气泡，而不是光滑和发亮。结膜干燥首先出现在颞象限，作为一个孤立的卵圆形或三角形补丁毗邻睑板间裂隙的角结膜缘。它几乎总是出现在双眼中。
In conjunctival xerosis the epithelium of the conjunctiva is transformed from the normal columnar to the stratified squamous type, with a resultant loss of goblet cells, formation of a granular cell layer, and keratinization of the surface. Clinically, these changes are expressed as marked dryness or unwettability, the affected area appearing roughened, with fine droplets or bubbles on the surface, rather than smooth and glistening. Conjunctival xerosis first appears in the temporal quadrant, as an isolated oval or triangular patch adjacent to the limbus in the interpalpebral fissure. It is almost always present in both eyes.
索引词 可用于检索该条目的同义词与别名
- 维生素A缺乏病伴结膜干燥症
英文词条（1）
- Vitamin A deficiency with conjunctival xerosis
后组配轴 Postcoordination
该条目未定义后组配轴，直接使用上面的编码即可。后组配是在主干编码之后追加侧别、具体解剖部位、严重程度、病因等细节的可选组合方式，不是必填项。