维生素A缺乏病伴结膜干燥症和比托斑点

定义

结膜干燥症提示晚期维生素A缺乏。整个结膜干燥，粗糙，波纹状，有时呈皮肤状。在某些个体中，角蛋白和腐生杆菌聚集在干燥的表面，使其呈现泡沫状或乳酪状外观。这种病变被称为比特斑。通过治疗，活动性结膜干燥症和Bitot斑在2-5天内开始缓解。大多数会在2周内消失，但有相当一部分颞部病变可能会以萎缩的形式持续数月。

Generalised conjunctival xerosis suggests advanced vitamin A deficiency. The entire conjunctiva appears dry, roughened, and corrugated, sometimes skin-like. In some individuals keratin and saprophytic bacilli accumulate on the xerotic surface, giving it a foamy or cheesy appearance. Such lesions are known as Bitot's spot. With treatment active conjunctival xerosis and Bitot's spot begin to resolve within 2-5 days. Most will disappear within 2 weeks, though a significant proportion of temporal lesions may persist, in shrunken form, for months.

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和比托斑点
• 比特氏斑
• 结膜干燥症伴比特氏斑
• 少年儿童的比托斑点