Descripción de la metaplasia escamosa por citología de impresión en pacientes con ojo seco / Description of squamous metaplasia by cytology of impression in patients with dry eye
El ojo seco se caracteriza por una deficiencia en la cantidad o calidad de la película lagrimal, que conlleva a cambios histológicos en la superficie ocular como la metaplasia escamosa.
Aproximadamente la mitad de los pacientes con ojo seco leve (49 por ciento ) presento grado 1 de metaplasia escamosa, el 53,8 por ciento de los pacientes con ojo seco moderado presentó grado 2 y el 57.1 por ciento de los pacientes con ojo seco severo presentó grado 3.
Dry eye is characterized by a deficiency in thequantity or quality of the lachrymal film, whichimplies histological changes in the surface of the eyesuch as squamous metaplasia. The purpose was todetermine the degree of the squamous metaplasiain the conjunctiva surface in patients with dry eyewith different degrees of clinical severity.
Methods:
63 eyes diagnosed with light, moderate and severedry eye and 20 eyes like controls subject were madeimpression cytology in the temporal and nasal bulbarconjunctiva with membranes of biopore (MilliporePICM012550). Membranes were fixed with ethanolat 96 percent and colored with periodic acid of Shiffhematoxylin,and they were mounted betweenslide and small slide with Entellan. The degree ofsquamous metaplasia was determined regarding thenumber of goblet cells and the morphologic changes ofepithelial cells, using the Murube and Rivas grading.
Results:
approximately half of the patients with lightdry eye (49 percent) presented a degree 1 of squamousmetaplasia, 53.8 percent of the patients with moderatedry eye presented a degree 2 and the 57.1 percent of thepatients with severe dry eye presented a degree 3.
Conclusions:
the degree of squamous metaplasia bycytology of impression is easily evidenced in patientswith moderate and severe dry eye, which contributesto the configuration of the clinical diagnosis and thefollow up of the disease.