Mechanisms and biomarker candidates in pterygium development / Mecanismos e candidatos a biomarcadores no desenvolvimento do pterígio

ABSTRACT Pterygium pathogenesis has been mainly asso ciated with UV light exposure; however, this association remains quite controversial. The complete mechanism of pterygium also remains to be clarified. Factors such as inflammation, viral infection, oxidative stress, DNA methylation, inflammatory mediators, extracellular matrix modulators, apoptotic and oncogenic proteins, loss of heterozygosity, microsatellite instability, lymphangiogenesis, epithelial-mesenchymal cell transition, and alterations in cholesterol metabolism have been identified as causes. Several studies aimed to clarify the molecular mechanisms underlying the growth and proliferation of pterygium. Understanding its molecular basis provides new potential therapeutic targets for its prevention and treatment. A comprehensive search of the databases, namely, MedLine, EMBASE, and LILACS, was conducted with the following key words: pterygium, epidemiology, pathogenesis, biomarkers, and review. This review describes the epidemiology, clinical presentation, and current investigation of biological mediators involved in pterygium development.

RESUMO A patogênese do pterígio tem sido relacionada, prin cipalmente, à exposição à luz ultravioleta, mas esta asso ciação permanece bastante controversa. O mecanismo completo do pte rígio também permanece por esclarecer. Fatores como inflamação, infecção viral, estresse oxidativo, metilação do DNA, mediadores inflamatórios, moduladores de matriz extracelular, proteínas apoptóticas e oncogênicas, perda de heterozigose, instabilidade de microssatélites, linfangiogênese, transição celular epitelial-mesenquimal e alterações no metabolismo do colesterol tem sido identificados como causas. Diversos estudos visam esclarecer os mecanismos moleculares subjacentes ao crescimento e proliferação do pterígio. Entender sua base mo lecular fornece novos alvos terapêuticos potenciais para sua prevenção e tratamento. Uma busca abrangente nas bases de dados, a saber, MedLine, EMBASE e LILACS, foi realizada com as seguintes palavras-chave: pterígio; epidemiologia; patogênese; biomarcadores e revisão. Esta revisão descreve a epidemiologia, apresentação clínica e a atual investigação de mediadores biológicos envolvidos no desenvolvimento do pterígio.

Mechanisms and biomarker candidates in pterygium development.

Pterygium pathogenesis has been mainly asso ciated with UV light exposure; however, this association remains quite controversial. The complete mechanism of pterygium also remains to be clarified. Factors such as inflammation, viral infection, oxidative stress, DNA methylation, inflammatory mediators, extracellular matrix modulators, apoptotic and oncogenic proteins, loss of heterozygosity, microsatellite instability, lymphangiogenesis, epithelial-mesenchymal cell transition, and alterations in cholesterol metabolism have been identified as causes. Several studies aimed to clarify the molecular mechanisms underlying the growth and proliferation of pterygium. Understanding its molecular basis provides new potential therapeutic targets for its prevention and treatment. A comprehensive search of the databases, namely, MedLine, EMBASE, and LILACS, was conducted with the following key words: pterygium, epidemiology, pathogenesis, biomarkers, and review. This review describes the epidemiology, clinical presentation, and current investigation of biological mediators involved in pterygium development.

Impact of pterygium on the ocular surface and meibomian glands.

PURPOSE: To analyze how ocular surface parameters correlate to presence of pterygium and investigate the possible impact of pterygia on tear film findings and meibomian glands findings. METHODS: We investigated objective parameters of the ocular surface such as conjunctival hyperemia, tear film stability and volume, meibomian gland dysfunction, dry eye disease, corneal topography comparing healthy individuals and correlating with the pterygium clinical presentation. RESULTS: A total of 83 patients were included. Corneal astigmatism induction was 2.65 ± 2.52 D (0.4-11.8). The impact of pterygium on the ocular surface parameters compared to matched controls was seen in: conjunctival hyperemia (control 1.55±0.39/pterygium 2.14±0.69; p = 0.0001), tear meniscus height (control 0.24±0.05 mm/pterygium 0.36±0.14mm; p 0.0002), meiboscore lower eyelid (control 0.29±0.64/pterygium 1.38±0.95; p 0.0001) and meiboscore upper eyelid (control 0.53±0.62/pterygium 0.98±0.75; p = 0.0083). We found a high number of pterygium patients (88%) presented meibomian gland alterations. Interestingly, meibomian gland loss was coincident to the localization of the pterygium in 54% of the upper and 77% lower lids. CONCLUSION: Pterygium greatly impacts on ocular surface by inducing direct alterations in the pattern of meibomian glands besides corneal irregularities, conjunctival hyperemia and lacrimal film alterations, inducing significant symptoms and potential signs of dysfunction.

Impact of conjunctival autograft on pterygium treatment: evaluation of related symptoms and patients' satisfaction after surgery.

PURPOSE: Pterygium is a fibrovascular condition of the ocular surface that can cause a broad range of irritative and visual symptoms. Controversy exists regarding pterygium mechanisms, management, surgical techniques, adjuvant approaches and impact on patients' quality of life. We performed a retrospective survey focused on the impact of pterygium-related symptoms before surgery and patients' satisfaction after excision surgery followed by conjunctival autograft transplantation with fibrin glue, based on patients' subjective reporting. METHODS: All patients underwent surgery consisting of the extensive removal of the pterygium fibrovascular tissue, followed by autologous conjunctival graft fixed with fibrin glue to cover the bare scleral area. A total of 500 patients were contacted by phone call and invited to participate in the study answering a brief two-question survey. First, to grade overall intensity of symptoms related to pterygium before surgical intervention, such as pain, irritation, tearing, red eye, photophobia, burning and foreign body sensation, using a scale from 0 to 10 (0 asymptomatic and 10 very severe symptoms). Results were categorized as mild (0-3), moderate (4-7) and severe (8-10). Then, patients were asked about their satisfaction with the surgery outcome, also using a scale from 0 to 10 (ranging from dissatisfied to fully satisfied). RESULTS: Patients' mean age was 41.5±12.31 (min 18/max 83) years old and the mean of days after surgery was 1,493±552.7 (min 711/max 2,702). Symptoms were referred to as severe (70.2%), moderate (25.2%) and mild (4.6%). After surgery, most patients were fully satisfied and the mean grade was 9.6; 1% (0-3), 2.4% (4-7) and 96.6% (8-10). Women presented a higher score of symptoms compared to men (P<0.01) but similar satisfaction rates. CONCLUSIONS: The present study shows that pterygium greatly impacts on patients' quality of life and that excision surgery using conjunctival autograft transplantation and fibrin glue improved symptoms with high rates of satisfaction.

"Transorbitario" foreign body after ATV accident / Corpo estranho "transorbitário" após acidente com quadriciclo

Abstract This report aims to show an unusual case of "transorbitário" wooden foreign body causing visual loss due to optic nerve damage on the side contralateral penetration of foreign matter.

Resumo O presente relato tem o objetivo de mostrar um caso incomum de corpo estranho de madeira "transorbitário" que causou perda visual por lesão do nervo óptico do lado contralateral a penetração do corpo estranho.

Endoftalmite fúngica endógena bilateral secundária a pielonefrite obstrutiva / Bilateral endogenous fungal endophthalmitis secondary obstructive pyelonephritis

RESUMO Os autores relatam um caso de endoftalmite fúngica endógena bilateral ocorrida após nefrostomia descompressiva decorrente de pielonefrite obstrutiva secundária a nefrolitíase tratada, inicialmente, com injeção intravítrea de voriconazol (100 ìg/0.1 ml) porém evoluiu sem resposta terapêutica sendo necessária a vitrectomia posterior (23G).

ABSTRACT The authors report a case of bilateral endogenous fungal endophthalmitis occurred after decompression nephrostomy due to secondary obstructive pyelonephritis the treated nephrolithiasis initially with intravitreal voriconazole (100 mg / 0.1 ml) but evolved without therapeutic response requiring the posterior vitrectomy (23G).

Alterações palpebrais: frequência de ocorrência e perfil dos portadores em amostra populacional brasileira / Eyelid disorders: frequency of occurrence and profile of carriers in a Brazilian population sample

Objetivo: Apresentar a frequência de ocorrência das alterações palpebrais em uma amostra populacional brasileira, assim como as características de seus portadores. Métodos: Estudo transversal utilizando amostra populacional aleatorizada, realizado nos anos de 2004/2005, em nove cidades da região centro-oeste do estado de São Paulo. Foram examinadas 7654 pessoas sendo os participantes avaliados segundo variáveis demográficas e exame oftalmológico completo. As alterações palpebrais foram avaliadas por meio de exame externo usando lanterna e lâmpada de fenda. Os dados obtidos foram analisados estatisticamente. Resultados: As alterações palpebrais como a triquíase e o ectrópio foram mais relacionadas às características homens, brancos, queixa de redução de acuidade visual para perto. Foi realizado tratamento cirúrgico em 72,7% das triquíases detectadas, assim como 28,5% dos ectrópios. Já os casos de ptose palpebral foram relacionados ao sexo feminino, brancas, com queixa de diminuição da acuidade visual para perto e 26,3% necessitaram de cirurgia. Entrópio foi detectado em um caso, masculino, branco e epibléfaro foi observado em um indivíduo do sexo feminino, parda. Conclusão: A alteração palpebral mais presente na população geral brasileira é a triquíase, seguida da ptose palpebral e do ectrópio. Os autores chamam a atenção para o fato de os portadores não possuírem queixas relacionadas às alterações palpebrais.

Purpose: to show the frequency of occurrence of the eyelid disorders in a Brazilian population sample, as well as the characteristics of the carriers. Methods: a transversal study using a random population sample was carried out in the years 2004/2005, involving nine cities of the middle west region of the State of São Paulo - Brazil. We had 7654 participants which were evaluated according to demographic variables and complete ophthalmological examination. The eyelid disorders were detected using a lantern and slit lamp. Data were statistically analyzed. Results: eyelid disorders such as of trichiasis and ectropion were more related to the characteristics men, whites, complaining of reduced near visual acuity and 72.7% of trichiasis underwent surgical treatment, as well as 28.5% of patients with ectropion. Ptosis was related to the females, whites, complaining of reduced near visual acuity and 26.3% required surgery. Entropion was detected only in one case, male, white and a case of epiblepharon was observed in a female, brown. Conclusion: the most frequent palpebral disorder observed in the Brazilian general population is trichiasis, followed by ptosis and ectropion. The authors call attention to the fact that carriers do not have complaints related to the eyelid disorders.

Calázio e características demográficas dos portadores em uma amostra populacional / Chalazion and demographic characteristics of patients in a population sample

Objetivo: Apresentar a frequência de ocorrência do calázio em uma amostra populacional, assim como as características de seus portadores. Métodos: Estudo transversal utilizando amostra populacional aleatorizada, realizado nos anos 2004/2005, na região centro-oeste do estado de São Paulo. Os participantes foram avaliados segundo variáveis demográficas e exame oftalmológico. Resultados: A frequência de ocorrência do calázio foi de 1,56%, sendo mais frequente em mulheres, portadores de astigmatismo ou hipermetropia de pequenos graus, com grande variação de idade de acometimento. Foi necessária prescrição de correção óptica e cirurgia em número expressivo de casos. Conclusão: O calázio tem baixa frequência de ocorrência na população geral. Ocorre predominantemente em mulheres e há associação importante com ametropia.

Purpose: To show the frequency of occurrence of chalazion in a population sample, as well as the characteristics of patients. Methods: A cross-sectional study using randomized population sample was carried out during 2004/2005, in the Midwest region of the state of São Paulo. Participants were evaluated according to demographic variables and ocular examination. Results: The frequency of occurrence of chalazion was 1.56‰, more common in women, people with astigmatism or low hyperopia, with wide variation in age of onset. It was necessary to prescribe optical correction and surgery in a significant number of cases. Conclusion: The chalazion has low frequency of occurrence in the general population. It occurs predominantly in women and there is a significant association with refractive error.