Cavitación coroidea asociada a coloboma macular. Estudio multimodal. Imagen en face / Choroid cavitation associated with macular coloboma. Multimodal study. Image en face

La cavitación intracoroidea es un hallazgo identificado con OCT descrito inicialmente en pacientes miopes, pero también aparece en pacientes no miopes. Puede presentarse tanto en el área peripapilar como en el polo posterior. El coloboma macular es un defecto del desarrollo embrionario del polo posterior, y en la OCT estructural es imprescindible la ausencia del epitelio pigmentario de la retina y de los vasos coroideos para su diagnóstico. Este caso presenta la cavitación intracoroidea circunscribiendo el coloboma macular, en ausencia de membrana intercalar. La imagen en face permite valorar la relación entre ambas estructuras, así como la magnitud de las mismas. (AU)

Intrachoroidal cavitation is a finding identified with OCT initially described in myopic patients, it also appears in non-myopic patients. It can occur in both the peripapillary area and the posterior pole. Macular coloboma is a defect of embryonic development of the posterior pole, in structural OCT the absence of the retinal pigment epithelium and choroidal vessels is essential. In this case, intrachoroidal cavitation circumscribes the macular coloboma, in the absence of an intercalary membrane. The face image allows us to assess the relationship between the two structures as well as their magnitude. (AU)

Choroid cavitation associated with macular coloboma. Multimodal study. Image en face.

Intrachoroidal cavitation is a finding identified with OCT initially described in myopic patients, it also appears in non-myopic patients. It can occur in both the peripapillary area and the posterior pole. Macular coloboma is a defect of embryonic development of the posterior pole, in structural OCT the absence of the retinal pigment epithelium and choroidal vessels is essential. In this case, intrachoroidal cavitation circumscribes the macular coloboma, in the absence of an intercalary membrane. The en face image allows us to assess the relationship between the two structures as well as their magnitude.

Citrobacter koseri. Una endoftalmitis exógena inusual / Citrobacter koseri, an unusual exogenous endoftalmitis

Citrobacter koseri es un bacilo gramnegativo que causa endoftalmitis de forma muy infrecuente y agresiva, asociando mal pronóstico visual. Solo el 6% de las endoftalmitis son por gramnegativos y nuestro germen representa un pequeño porcentaje. Presentamos un varón de 65 años que trabaja en un laboratorio de animales. Acude a urgencias por pérdida de visión del ojo izquierdo debido a una hemorragia vítrea y desprendimiento de retina. Se practica una vitrectomía y 3 días después, desarrolla una endoftalmitis. Se realiza tratamiento intravítreo con inyecciones de vancomicina y ceftazidima así como tratamiento antibiótico tópico. Veinticuatro horas después, regresa con perforación corneal y una extrusión del cristalino. Ante la gravedad del cuadro se realiza una evisceración. El cultivo de las muestras confirman el microorganismo. Suponemos que la puerta de entrada del germen fueron las esclerotomías por el material de sutura expuesto, tras la manipulación de heces de roedores.(AU)

Citrobacter koseri is a bacillus that causes infrequent endophthalmitis. Six percent of cultures in endophthalmitis are Gram -, and as in these, Citrobacter koseri is associated with a poor visual prognosis. We present a 65-year-old man who works in an animal laboratory. He went to emergencies with loss of vision in his left eye due to a vitreous hemorrhage. A vitrectomy was performed and 3 days later, endophthalmitis was diagnosed. Vancomycin and ceftazidime were applied in eye drops and in two intravitreal injections. Twenty-four hours later he returned with a lens extrusion. Due to the severity of the condition, an evisceration was performed. Subsequently, the samples confirm the microorganism. We assume that the entry point for the bacterium was the sclerotomies through the exposed suture material, after handling rodent feces.(AU)

Citrobacter koseri, an unusual exogenous endoftalmitis.

Citrobacter koseri is a bacillus that causes infrequent endophthalmitis. 6% of cultures in endophthalmitis are Gram -, and as in these, C. koseri is associated with a poor visual prognosis. We present a 65-year-old man who works in an animal laboratory. He went to emergencies with loss of vision in his left eye due to a vitreous hemorrhage. A vitrectomy was performed and 3 days later, endophthalmitis was diagnosed. Vancomycin and Ceftazidime were applied in eye drops and in two intravitreal injections. 24 h later he returned with a lens extrusion. Due to the severity of the condition, an evisceration was performed. Subsequently, the samples confirm the microorganism. We assume that the entry point for the bacterium was the sclerotomies through the exposed suture material, after handling rodent feces.

Concordancia inter e intraobservador en la medida de los agujeros maculares por tomografía de coherencia óptica / Inter- and intra-observer agreement in the measurement of macular holes by optical coherence tomography

Antecedentes y objetivo El agujero macular de espesor completo (AMEC) es una lesión foveal causada por un defecto del espesor completo de la retina neurosensorial. En su diagnóstico y en la indicación de tratamiento quirúrgico se tiene en cuenta la medida del agujero según la herramienta proporcionada por la OCT. Dicha medida puede ser realizada por varios oftalmólogos a lo largo del seguimiento de un paciente. El objetivo de este estudio es averiguar si existe variabilidad intraindividual e interindividual en dichas mediciones. Material y métodos Revisión retrospectiva de imágenes de b-scans de OCT con diagnóstico de AMEC. Se realizaron mediciones del diámetro mínimo del AMEC mediante la herramienta manual disponible en el DRI-Triton (Topcon, Japón) en las escalas 1:1 y 1:2, en días diferentes, por 2 especialistas en retina y 2 residentes. Se compararon dichas mediciones para valorar la correspondencia interobservador e intraobservador Resultados Se analizan 34 imágenes. Para la variabilidad intraobservador se obtuvo un índice de correlación superior a 0,98 en todos los casos. Para la variabilidad interobservador, el coeficiente de correlación intraclase fue de 0,94 (IC del 95%, 0,91-0,97) para la escala 1:1, y de 0,94 (IC del 95%, 0.91-0,97) para la escala 1:2. Conclusiones Los valores del tamaño de los AMEC medidos por OCT son reproducibles entre oftalmólogos especialistas y residentes y son independientes de la escala de la imagen en la que se realice dicha medición (AU)

Background and objective A full-thickness macular hole (FTMH) is a foveal lesion caused by a defect in the full thickness of the neurosensory retina. Its diagnosis and the indication for surgical treatment take into account the measurement of the hole according to the tool provided by the OCT. This measurement can be performed by several ophthalmologists during the follow-up of a patient. The aim of this study is to find out whether there is intra-individual and inter-individual variability in these measurements. Material and methods Retrospective review of OCT b-scan images with a diagnosis of FTMH. Measurements of the minimum diameter of the FTMH were performed using the hand-held tool available on the DRI-Triton (Topcon, Japan) at 1:1 and 1:2 scales, on different days, by 2retina specialists and 2residents. These measurements were compared to assess inter-observer and intra-observer correspondence. Results Thirty-four images were analysed. For intra-observer variability, a correlation index higher than 0.98 was obtained in all cases. For inter-observer variability, the intra-class correlation coefficient was 0.94 (95% CI: 0.91-0.97) for the 1:1 scale, and 0.94 (95% CI: 0.91-0.97) for the 1:2 scale. Conclusions OCT-measured AMEC size values are reproducible between ophthalmic specialists and residents and are independent of the imaging scale at which the measurement is made (AU)

Agujero macular iatrogéno durante la inyección de perfluorocarbono líquido en una cirugía de desprendimiento de retina / Iatrogenic macular hole during liquid perfluorocarbon injection in retinal detachment surgery

Reportar la formación de agujero macular durante la inyección intravítrea de perfluorocarbono líquido en la cirugía programada de desprendimiento de retina. Caso clínico Varón de 73 años con desprendimiento de retina regmatógeno superotemporal. Durante la inyección de perfluorocarbono líquido se produce un agujero macular de espesor completo con acumulación del perfluorocarbono en el espacio subretiniano. El líquido se extrajo a través del agujero macular. La tomografía de coherencia óptica confirmó un agujero macular de espesor total en el examen postoperatorio. Un mes después se repara con técnica de colgajo invertido de membrana limitante interna con resultado funcional satisfactorio. La inyección de perflurocarbono líquido intravítreo es electiva, facilita el drenaje del fluido subretiniano en los desprendimientos de retina. Algunas complicaciones han sido asociadas a su empleo, intraoperatorias y postoperatorias. Hasta el momento no ha sido reportado ningún caso de agujero macular completo producido durante la inyección intravítrea de perfluorocarbono (AU)

To describe a macular hole development during intravitreal injection of perfluorocarbon liquid used to repair a rhegmatogenous retinal detachment. Clinical case A 73-year-old man presented with superotemporal rhegmatogenous retinal detachment. During surgery, along the perflorocarbon liquid injection, a full thickness macular developed and perfluorocarbon was accumulated in subretinal space. Perfluorocarbon liquid was then extracted through the macular hole. Postoperatively, ocular coherence tomography confirmed the existence of a full-thickness macular hole. One month later, this macular hole was successfully treated with the use of an inverted internal limiting membrane flap. Intravitreous liquid PFC injection is a resource to aid in subretinal fluid exit. A number of complications, both intra and postoperative, have been associated with the use of PFC. This is the first reported case of a complete macular hole secondary to PFC injection (AU)

Iatrogenic macular hole during liquid perfluorocarbon injection in retinal detachment surgery.

To describe a macular hole development during intravitreal injection of perfluorocarbon liquid used to repair a regmatogenous retinal detachment. CLINICAL CASE: A 73-year-old man presented with superotemporal regmatogenous retinal detachment. During surgery, along the perflorocarbon liquid injection, a full thickness macular developed and perfluorocarbon was accumulated in subretinal space. Perfluorocarbon liquid was then extracted through the macular hole. Postoperatively, ocular coherence tomography confirmed the existence of a full-thickness macular hole. One month later, this macular hole was successfully treated with the use of an Inverted internal limiting membrane flap. Intravitreous liquid PFC injection is a resource to aid in subretineal fluid exit. A number of complications, both intra and postoperative, have been associated with the use of PFC. This is the first reported case of a complete macular hole secondary to PFC injection.

Acute Horner syndrome secondary to glandular fever due to Epstein Barr virus infection.

We present a clinical situation where a 47-year old female patient consulted with left partial ptosis and miosis that started, two weeks before, with an episode of glandular fever secondary to Epstein-Barr infection. Apraclonidine 0.5% and Phenylephrine 1% drop testing was performed with results consistent with suspected left Horner Syndrome (HS), with a probable postganglionic location. Magnetic Resonance Angiography (MRA) at the moment of the acute presentation did not show any image suggesting carotid arterial dissection but showed irregular narrowing of the left internal carotid artery on its paravertebral extracranial way, consistent to enlarged intra-carotid sheath lymphoid tissue. A week later, a Doppler ultrasound was performed, showing bilateral images compatible with internal carotid arterial dissection. When Postganglionar HS is suspected, the first aetiology to rule out is a carotid arterial dissection because of its potentially fatal outcome and for being a more described entity as postganglionic HS aetiology. However, it is also evidenced that a certain diagnose is not always possible. Furthermore, we describe the enlarged internal carotid artery sheath lymphoid tissue as a possible cause of sympathetic nerve disruption causing a Postganglionar HS, although not common.

[Methicillin-resistant Staphylococcus epidermidis infectious keratitis: Clinical and microbiological profile].

OBJECTIVE: Staphylococcus epidermidis (SE) is a common cause of bacterial keratitis in certain geographic areas. A high percentage of resistance to methicillin is shown, which gives it cross resistance to beta-lactams and sometimes resistance to other antibacterial groups. We analyzed clinical and microbiological variables in patients with infectious keratitis due to SE. METHODS: Medical records of 43 patients with suspected infectious keratitis and microbiological confirmation for SE, between October 2017 and October 2020, were retrospectively studied. Clinical characteristics (risk factors, size of lesions, treatment, evolution) and microbiological (susceptibility to antibiotics) were analyzed, and groups of patients with methicillin-resistant (MRSE) and methicillin-susceptible (MSSE) infection were compared. RESULTS: MRSE was present in 37.2% of infectious keratitis. All isolates were sensitive to vancomycin and linezolid. Rates of resistance to tetracyclines and ciprofloxacin were 50% and 56% in the MRSE group, and 11% and 7% in the MSSE group. The clinical characteristics, including size of lesion, visual axis involvement, inflammation of anterior chamber, presence of risk factors and follow-up time, did not show statistically significant differences between groups. CONCLUSIONS: MRSE is a common cause of infectious keratitis caused by SE and shows a high rate of multidrug resistance. Clinically, it does not differ from MSSE keratitis. Additional work is needed to confirm these findings.

Comportamiento de los fluidos tamponadores migrados a cámara anterior / Behaviour of buffer fluids migrated to the anterior chamber

Una complicación del uso de fluidos tamponadores en la cirugía vitreorretiniana es la posible migración a cámara anterior (CA).