2004
DOI: 10.1590/s0004-27492004000100022
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Avaliação da presença de células caliciformes na córnea humana

Abstract: INTRODUÇÃOEvidências recentes indicam que uma fração das células epiteliais basais do limbo corresponde às células epiteliais germinativas límbicas. Estas cé-lulas são responsáveis pela manutenção das características do epitélio da córnea (1) . Estudos experimentais e clínicos mostram que a remoção das cé-lulas epiteliais germinativas resulta em crescimento epitelial conjuntival sobre a córnea (conjuntivalização), e com concomitante vascularização e inflamação (2)(3) . A demonstração de células caliciformes da… Show more

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Cited by 5 publications
(6 citation statements)
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“…LSCD can be confirmed by detection of goblet cells on the surface of the cornea by impression cytology (7) . Goblet cells can be easily highlighted by performing routine PAS staining on the specimens (3)(4)6) . The identification of cytokeratins Legend: M= male; F= female; IC= impression cytology specific for corneal and conjunctival epithelium has been also proposed for the diagnosis of LSCD, especially if the disease induces an advanced squamous metaplasia with total loss of goblet cells on conjunctiva (5,7) .…”
Section: Discussionmentioning
confidence: 99%
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“…LSCD can be confirmed by detection of goblet cells on the surface of the cornea by impression cytology (7) . Goblet cells can be easily highlighted by performing routine PAS staining on the specimens (3)(4)6) . The identification of cytokeratins Legend: M= male; F= female; IC= impression cytology specific for corneal and conjunctival epithelium has been also proposed for the diagnosis of LSCD, especially if the disease induces an advanced squamous metaplasia with total loss of goblet cells on conjunctiva (5,7) .…”
Section: Discussionmentioning
confidence: 99%
“…From the slide sets, only IC specimens with at least one third of the filter surface filled with epithelial cells were evaluated by optical microscopy. Partial conjunctivalization suggestive of focal LSCD was defined by IC when one or more intact PAS-positive conjunctival goblet cells were found on the corneal surface at the site of the keratectomy (3)(4)(5)(6)12) . The surgeries were performed in the 20 donor eyes by 3 experienced corneal surgeons.…”
Section: Methodsmentioning
confidence: 99%
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“…Thus, as conjunctiva is an easily accessible tissue source for cytological examination, the analysis of the features from melanocytic cells by the noninvasive and affordable impression cytology (IC) can help in the differentiation of benign from malignant pigmented tumors of the bulbar conjunctiva (7)(8) . IC, first described in 1977 for the collection of mucin and cells from the conjunctiva (9) , had other diagnostic possibilities, such as: ocular surface squamous neoplasia (10)(11)(12)(13) , dry eyes (14) , vitamin A deficiency (15) , allergic conjunctivitis (16) , limbal stem cell failure (17) and microbiological infections (18) . The aim of this study was to report the IC features of conjunctival nevi.…”
Section: Introductionmentioning
confidence: 99%
“…No entanto, a citologia de impressão, método não invasivo para avaliação da superfície ocular que emprega uso de papel filtro de ésteres de celulose, foi recentemente relatada como útil na detecção de cistos no epitélio da córnea de pacientes com diagnóstico clínico de ceratite superficial por Acanthamoeba sp confirmada por cultura (7) . A citologia de impressão é usada como exame complementar de rotina em diversos diagnósticos como: deficiência de células germinativas no limbo (8) , metaplasia escamosa com perda de células caliciformes conjuntivais (9) , lesões neoplásicas da superfície ocular, entre outras (10) . Neste artigo relatam-se três casos de ceratite por Acanthamoeba sp com cistos detectados na córnea pela citologia de impressão (CI), pela citologia esfoliativa, pelo cultivo das amostras e identificação do microrganismo e, em um dos casos, com exame anatomopatológico.…”
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