Vitamin A deficiency with conjunctival xerosis (Q39905): Difference between revisions
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Na xerose conjuntival, o epitélio da conjuntiva é transformado do tipo colunar normal para o tipo escamoso estratificado, com a resultante perda de células caliciformes, formação de uma camada de células granulares e queratinização da superfície. Clinicamente, essas mudanças são expressas como ressecamento acentuado ou baixa umidade, a área afetada torna-se rugosa, com gotículas finas ou bolhas na superfície, em vez de lisa e brilhante. A xerose conjuntival aparece primeiro no quadrante temporal, como uma placa oval ou triangular isolada adjacente ao limbo na fissura interpalpebral. Quase sempre está presente nos dois olhos. | |||
| description / en | description / en | ||
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. | |||
Revision as of 05:29, 13 August 2026
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.
| Language | Label | Description | Also known as |
|---|---|---|---|
| default for all languages | 5B55.1 |
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| English | Vitamin A deficiency with conjunctival xerosis |
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. |
