Etiology of Macular Edema Defined by Deep Learning in Optical Coherence Tomography Scans.

Purpose: To develop an automated method based on deep learning (DL) to classify macular edema (ME) from the evaluation of optical coherence tomography (OCT) scans. Methods: A total of 4230 images were obtained from data repositories of patients attended in an ophthalmology clinic in Colombia and two free open-access databases. They were annotated with four biomarkers (BMs) as intraretinal fluid, subretinal fluid, hyperreflective foci/tissue, and drusen. Then the scans were labeled as control or ocular disease among diabetic macular edema (DME), neovascular age-related macular degeneration (nAMD), and retinal vein occlusion (RVO) by two expert ophthalmologists. Our method was developed by following four consecutive phases: segmentation of BMs, the combination of BMs, feature extraction with convolutional neural networks to achieve binary classification for each disease, and, finally, multiclass classification of diseases and control images. Results: The accuracy of our model for nAMD was 97%, and for DME, RVO, and control were 94%, 93%, and 93%, respectively. Area under curve values were 0.99, 0.98, 0.96, and 0.97, respectively. The mean Cohen's kappa coefficient for the multiclass classification task was 0.84. Conclusions: The proposed DL model may identify OCT scans as normal and ME. In addition, it may classify its cause among three major exudative retinal diseases with high accuracy and reliability. Translational Relevance: Our DL approach can optimize the efficiency and timeliness of appropriate etiological diagnosis of ME, thus improving patient access and clinical decision making. It could be useful in places with a shortage of specialists and for readers that evaluate OCT scans remotely.

Toxicidad retiniana inducida por nuevos antineoplásicos. Revisión de la literatura / Retinian toxicity induced by new antineoplastics. Literature review

Introducción: Los nuevos antineoplásicos son medicamentos innovadores en el tratamiento del cáncer. Actualmente hay poca información sobre la seguridad y efectos adversos de estos medicamentos a nivel retiniano. Es importante conocer estos efectos para prevenir pérdida de visión en pacientes oncológicos. Objetivo: Definir cuáles son los hallazgos de toxicidad retiniana en los usuarios de nuevos antineoplásicos. Diseño del estudio: Revisión de la literatura. Métodos: Se realizó una búsqueda de literatura en PubMed, Embase, Cochrane, Scielo y literatura gris con términos MeSH: "toxicity" AND "retina" AND "drugs" AND/OR "MEK inhibitors", "BRAF inhibitors", "checkpoint inhibitors". Se seleccionaron 16 artículos para análisis y extracción de datos. Resultados: Existen múltiples efectos adversos reportados en la literatura, los más comunes son desprendimiento de retina exudativo y seroso asociado a la presencia de líquido subretiniano, oclusión de vena central de retina y alteraciones vasculares. La patología más estudiada ha sido melanoma metastásico y la terapia que más presenta efectos adversos ha sido la combinada MEK-BRAF.

Background: The new antineoplastics are innovative drugs in the treatment of cancer. There is currently little information on the safety and adverse effects of these medications at the retinal level. It is important to know these effects to prevent vision loss in cancer patients. Objective: To define the characteristics of retinal toxicity in patients who use new antineoplastic drugs. Study design: Literature review. Methods: A literature search was carried out in PubMed, Embase, Cochrane, Scielo and gray literature with MeSH terms: "toxicity" AND "retina" AND "drugs" AND/OR "MEK inhibitors", "BRAF inhibitors", "checkpoint inhibitors". 16 articles were selected for analysis and data extraction. Results: There are multiple adverse effects reported in the literature, the most common are exudative and serous retinal detachment associated with the presence of subretinal fluid, central retinal vein occlusion and vascular alterations. The most studied pathology has been metastatic melanoma and the therapy with the most adverse effects has been the combined MEK-BRAF

A comparison of posterior segment optical coherence tomography findings in full-term and preterm children without retinopathy of prematurity.

Purpose: Structural differences have been described in the retina of prematurely born children, including increased macular thickness caused by failed migration of the inner retina during development and retinal nerve fiber layer (RNFL) thinning related to low birth weight. The present study aimed to evaluate the differences in macular and RNFL optical coherence tomography (OCT) findings between full-term and preterm children without retinopathy of prematurity (ROP). Methods: Thirty-four premature (study group) and 43 full-term patients (control group)-aged 3 to 8 years-were studied. All children underwent a complete ophthalmological exam and OCT of the macula and optic nerve in both eyes to determine macular and RNFL thickness and morphology. Correlation analysis between central macular thickness, age, and visual acuity was also performed. Results: Central macular thickness was greater in the study group than in the control group; a difference of 14.2 µm was observed for the right eye (P = 0.002) and 12.16 µm for the left eye (P = 0.019). The thickness of the parafoveal and the perifoveal zones was consistently greater in the study group. 44.3% of eyes in the study group had mild forms of foveal hypoplasia (grades 1a and 1b) in qualitative description. No correlation between central macular thickness and visual acuity was found. There was no difference in RNFL thickness between both groups. Conclusion: Statistically significant structural differences were found in the macula of premature children, with a greater foveal thickness possibly reflecting retention of the inner retina during development, with no repercussion over visual acuity. RNFL thickness was similar in both groups.

Alteraciones oftalmológicas en una cohorte de niños con antecedente de nacimiento pretérmino en Bogotá, Colombia / Ophthalmologic alterations in a cohort of children with a history of pre-term birth in Bogota, Colombia

Introducción: La prematuridad se asocia con secuelas oftalmológicas graves, como la retinopatía de la prematuridad (RP), pero otras menos reconocidas incluyen una menor agudeza visual y una mayor frecuencia de defectos refractivos y estrabismo. Objetivo: Describir las alteraciones oftalmológicas encontradas en una cohorte de niños de entre 3 y 8 años con antecedente de prematuridad. Método: Estudio de cohorte prospectiva que incluyó 62 pacientes del programa canguro del Hospital Militar Central (Bogotá). Se registraron antecedentes perinatales y se realizó valoración oftalmológica completa. Se determinaron prevalencias de baja agudeza visual, defectos refractivos y estrabismo, y se compararon subgrupos según peso y edad gestacional. Resultados: La prevalencia de RP fue del 1.61%, correspondiente a una paciente ciega con estadio V. Esta cifra fue significativamente más baja que la reportada en otros estudios, pero concordante con la frecuencia esperada para RP grave. El 10.48% tenían agudezas visuales < 20/40, incluyendo dos pacientes con no percepción de luz y no fija, no sigue, no mantiene, como secuelas de RP y alteraciones neurológicas, pertenecientes al subgrupo de prematuridad extrema, con significancia estadística. Se encontraron unas prevalencias del 87.09% para hipermetropía, el 6.14% para miopía y el 62.9% para astigmatismo. La menor frecuencia de miopía se debe posiblemente al bajo número de pacientes con RP. La prevalencia de estrabismo fue del 30.65%, siendo más frecuente la exotropía, con un 20.97%, sin diferencias en el análisis por subgrupos. Conclusiones: La morbilidad oftalmológica es una secuela importante de la prematuridad. Un porcentaje considerable tendrá baja agudeza visual, debido a defectos refractivos, estrabismo, alteraciones neurológicas y RP, la cual sigue siendo una importante causa de ceguera infanti

Introduction: Pre-term birth is associated with serious ophthalmic sequelae like retinopathy of prematurity (ROP), but other less recognized include decreased visual acuity, and higher frequency of refractive errors and strabismus. Objective: Describe ophthalmological alterations found in a cohort of children between 3 to 5 years of age with a history of preterm birth. Method: Prospective cohort study, including 62 patients from kangaroo mother care program in Central Military Hospital (Bogotá). Perinatal factors were registered and complete ophthalmic examination was performed. Prevalence of low visual acuity, refractive errors and strabismus were determined, and groups according to birth weight and gestational age were compared. Results: Prevalence of RP was 1.61%, corresponding to a blind patient with stage V disease, this is considerably lower than that reported in other studies, but consistent with expected frequency for severe RP. 10.48% of eyes had visual acuity worse than 20/40, including 2 patients with NLP and NFNSNM, secondary to RP and neurologic alterations, who belong to the extreme preterm subgroup, with statistical significance. Prevalence of 87.09% were found for hyperopia, 6.14% for myopia and 62.9% for astigmatism. Lesser frequency of myopia is possibly due to the low number of patients with RP. Prevalence of strabismus was 30.65%, being exotropia the most common deviation with 20.97%, with no difference in subgroup analysis. Conclusions: Ophthalmic morbidity is an important sequel of prematurity. A considerable percentage will have low visual acuity secondary to refractive errors, strabismus, neurological alterations, and RP, which remains a major cause of childhood blindness

Oclusión vascular mixta de la retina en una paciente con síndrome antifosfolípido. Reporte de caso / Mixed retinal vascular occlusion secondary to antiphospholipid antibody syndrome. A case report

Introducción: La oclusión combinada de la arteria y la vena central de la retina es un evento vascular poco frecuente, caracterizado por pérdida visual súbita y pronóstico reservado. Los pocos casos reportados se asocian con antecedentes de patología sistémica vasculítica, reumatológica, infecciosa o tumoral. Objetivo: Describir un caso de doble oclusión vascular retiniana secundario a síndrome de anticuerpos antifosfolípidos. Resumen del caso: Se reporta el caso de una paciente de 31 años con oclusión de vena y arteria central de la retina, con historia clínica y paraclínicos compatibles con un síndrome de anticuerpos antifosfolípidos de base, enfermedad de difícil manejo con un pobre pronóstico visual, con secuelas visuales graves, rápidas e irreversibles. Conclusiones: Las oclusiones vasculares combinadas de arteria y vena central de la retina son poco frecuentes. Se caracterizan por pérdida súbita de la visión y hallazgos clínicos propios de ambos tipos de oclusiones: palidez retinal, mancha de color rojo cereza, dilatación venosa, hemorragias en llama, edema de disco, etc. Por lo regular tiende a relacionarse con patologías infecciosas, autoinmunitarias o tumorales, entre otras, como es el caso del síndrome antifosfolípido. Las opciones terapéuticas son limitadas y la respuesta es incierta, con un mal pronóstico visual y secuelas irreversibles

Introduction: Combined vascular occlusion of the central retinal artery and vein is a rare vascular event, characterized by sudden visual loss and uncertain prognosis. The few cases reported in literature are associated with a history of vasculitic, rheumatological, infectious or tumoral pathology. Objective: To describe a mixed retinal vascular occlusion secondary to antiphospholipid antibody syndrome. Case summary: We report a case with mixed retinal vascular occlusion in a patient with history of antiphospholipid antibody syndrome , with poor visual prognosis, difficult treatment and severe irreversible sequelae. Conclusions: Combined retinal vascular occlusions are rare entities characterized by sudden vision loss and clinical findings of both types of occlusions: retinal pallor, cherry red spot, venous dilatation, hemorrhages, disc edema, etc. Usually, these are related to infectious, autoimmune or neoplasic diseases, like antiphospholipid syndrome. The therapeutic options are limited and their effectiveness is vague, leading to poor visual prognosis and irreversible sequelae

Vasculitis Oblioterativa Idiopática. Reporte de tres casos / Idiopathic obliterative retinal vasculitis. Three cases report

Se presentan tres casos de mujeres jóvenes que presentaron perdida de agudeza visual sin otros síntomas asociados, al examen físico se encontraron signos de vasculitis obliterativa de la retina. Se realizaron estudios complementarios tanto oftalmológicos como sistémicos, pero no se encontró ningún hallazgo sugestivo de una patología primaria como causa de la vasculitis. Se les diagnosticó entonces vasculitis obliterativa idiopática de la retina. Es escasa la información que existe en la literatura sobre esta patología, por lo cual el diagnóstico final generalmente se hace de forma tardía, retrasando también un tratamiento oportuno.

This article presents three cases of young women who presented visual acuity loss without other symptoms, the ophthalmologic exam showed evidence of obliterative vasculitis. Complementary ocular and systemic exams were made but there was no fi nding suggesting a primary pathology as the cause of the vasculitis. Thus, they were diagnosed with idiopathic obliterative retinal vasculitis. There is scarce information about this entity in the medical literature.

Enfermedad de Coats, presentación de un caso y revisión de la literatura / Coats Disease, case report and literatura review

La enfermedad de Coats, es una vasculopatía retiniana idiopática que sin tratamiento puede progresar a desprendimiento de retina exudativo y glaucoma neovascular. Se considera una patología de difícil diagnóstico, por su presentación clínica que simula otras vasculopatías retinianas ó retinoblastoma. Resulta indispensable contar con herramientas clínicas y paraclínicas para llegar a un diagnóstico acertado y poder realizar un manejo adecuado y oportuno. Presentamos el caso de un niño de 17 años, con enfermedad de Coats valorado y tratado en el Hospital Militar Central de Bogotá desde los 5 años de edad; Se realiza seguimiento clínico de 12 años de evolución y se discuten posibles diagnósticos diferenciales.

Coats disease is an idiopathic retinal vasculopathy that can progress to exudative retinal detachment and neovascular glaucoma if is not treated. It is considered a condition of difficult diagnosis due to clinical presentation, simulating retinoblastoma or other retinal vascular disease. It is essential to have clinical and paraclinical tools to have a correct diagnosis and to make adequate and timely handling. We report the case of a child of 17 years old with Coats disease assessed and treated at the Central Military Hospital in Bogota from 5 years of age during 12 years. Th e clinical evolution is described and a brief depiction of the disease is presented with its diff erential diagnoses.

Manifestaciones oculares y orbitarias de enfermedades gastrointestinales / Ocular and orbital manifestations of gastrointestinal diseases

El propósito de este artículo es revisar las patologías de origen gastrointestinal que se manifiestan sobre los tejidos oculares, en algunos casos, como signo predictor o temprano de la enfermedad y en otros, generando enfermedad sobre el ojo y/o sus anexos.De igual manera se revisan patologías sistémicas de origen no ocular ni gastrointestinal pero que terminan envolviendo en su curso a ambos sistemas.

The purpose of this article is to perform a review over gastrointestinal diseases can affect the ocular tissues. Sometimes like a predictor symptom and in other instances the eye become as a one of the many organs affected by the severity of the basis disease. In the same way both gastrointestinal system and visual system may be involved as part of a systemic disease.