Efectos secundarios oculares de las terapias oncológicas. Revisión / Ocular side effects of oncological therapies: Review

Con el avance de la terapia contra el cáncer en los últimos años, ha aumentado el conocimiento de los mecanismos involucrados en esta enfermedad, lo que ha supuesto un aumento de la calidad de vida y de la supervivencia de los pacientes con afecciones tumorales anteriormente consideradas incurables o refractarias al tratamiento. El número de fármacos utilizados ha sufrido un aumento exponencial, y a pesar de que la toxicidad implícita es menor que la de la terapia antineoplásica convencional, conllevan la aparición de nuevos efectos adversos asociados, que el oftalmólogo debe reconocer y manejar.(AU)

With the advance of cancer therapy in recent years, the knowledge of the mechanisms involved in this disease has increased, which has meant an increase in the quality of life and survival of patients with tumor pathologies previously considered incurable or refractory to treatment. The number of drugs used has increased exponentially in number, and although the implicit toxicity is lower than that of conventional antineoplastic therapy, they lead to the appearance of new associated adverse effects that the ophthalmologist must recognize and manage.(AU)

Ocular side effects of oncological therapies: Review.

With the advance of cancer therapy in recent years, the knowledge of the mechanisms involved in this disease has increased, which has meant an increase in the quality of life and survival of patients with tumor pathologies previously considered incurable or refractory to treatment. The number of drugs used has increased exponentially in number, and although the implicit toxicity is lower than that of conventional antineoplastic therapy, they lead to the appearance of new associated adverse effects that the ophthalmologist must recognize and manage.

COVID-19 pandemic: Impact on the rate of viral conjunctivitis.

OBJECTIVE: The COVID-19 pandemic led Spain to order a state of alert with the cessation of non-essential activities on 14 March 2020, and to implement public health interventions (such as home confinement) and other health recommendations to prevent the spread of the SARS-CoV-2 virus (hand washing and the obligation to wear face-masks). These factors could have influenced the rate of viral conjunctivitis. METHOD: In this retrospective, noninterventional, descriptive study, the incidence of viral conjunctivitis in an emergency department of a national hospital is compared over two distinct time periods: pre-COVID (13 March-30 September 2019, one year before the start of the pandemic) and COVID (13 March-30 September 2020). RESULTS: In the first period there were 436 cases of conjunctivitis, of which 168 (38.5%) were confirmed cases of viral conjunctivitis 168 (38.5%), while in the second period there were 121 recorded cases, of which the most frequent were allergic and traumatic (23 cases; 19% each group), bacterial (15 cases; 12.3%) and viral (15 cases; 12.3%). The diagnosis of viral conjunctivitis is the one that suffered the most significant relative reduction (48.5%), while other types of conjunctivitis hardly changed their relative frequency between these two periods of time. CONCLUSIONS: Viral conjunctivitis is the most frequent infectious disease of the eye and has a transmission rate similar to that of coronavirus, so the measures implemented could positively affect its incidence.

Pandemia COVID-19: impacto sobre la tasa de conjuntivitis virales / COVID-19 pandemic: Impact on the rate of viral conjunctivitis

Objetivo: La pandemia COVID-19 condujo a España al decreto de estado de alarma con cese de actividades no esenciales el 14 de marzo de 2020 y a intervenciones de salud pública, como el confinamiento domiciliario y otras recomendaciones sanitarias para evitar la propagación del virus SARS-CoV-2: la higiene de manos y la obligatoriedad de portar mascarillas. Estos factores podrían haber influido en la tasa de conjuntivitis virales. Método: En este estudio descriptivo retrospectivo no intervencionista se compara la incidencia de conjuntivitis virales en un servicio de urgencias de un hospital nacional sobre dos periodos de tiempo: pre-COVID (13 de marzo a 30 de septiembre de 2019, un año antes del inicio de la pandemia) y COVID (13 de marzo a 30 de septiembre de 2020). Resultados: En el primer periodo hubo 436 conjuntivitis, de las cuales 168 (38,5%) fueron casos confirmados de conjuntivitis viral 168 (38,5%), mientras que en el segundo periodo hubo 121 registros, de los cuales los más frecuentes fueron las conjuntivitis alérgicas y las traumáticas, con 23 casos (19% cada grupo); las conjuntivitis bacterianas, con 15 casos (12,3%), y las conjuntivitis virales, con 15 casos (12,3%). El diagnóstico de conjuntivitis viral es el que experimenta una reducción relativa más importante (48,5%), mientras que otros tipos de conjuntivitis apenas cambian su frecuencia relativa entre estos dos periodos de tiempo. Conclusiones: La conjuntivitis viral, como patología infecciosa más frecuente del ojo, tiene una transmisión similar a la del coronavirus, por lo que las medidas implantadas podrían afectar positivamente a su incidencia.

Objective: The COVID-19 pandemic led Spain to order a state of alert with the cessation of non-essential activities on 14 March 2020, and to implement public health interventions (such as home confinement) and other health recommendations to prevent the spread of the SARS-CoV-2 virus (hand washing and the obligation to wear face-masks). These factors could have influenced the rate of viral conjunctivitis.Method: In this retrospective, noninterventional, descriptive study, the incidence of viral conjunctivitis in an emergency department of a national hospital is compared over two distinct time periods: pre-COVID (13 March-30 September 2019, one year before the start of the pandemic) and COVID (13 March-30 September 2020).Results: In the first period there were 436 cases of conjunctivitis, of which 168 (38.5%) were confirmed cases of viral conjunctivitis 168 (38.5%), while in the second period there were 121 recorded cases, of which the most frequent were allergic and traumatic (23 cases; 19% each group), bacterial (15 cases; 12.3%) and viral (15 cases; 12.3%). The diagnosis of viral conjunctivitis is the one that suffered the most significant relative reduction (48.5%), while other types of conjunctivitis hardly changed their relative frequency between these two periods of time.Conclusions: Viral conjunctivitis is the most frequent infectious disease of the eye and has a transmission rate similar to that of coronavirus, so the measures implemented could positively affect its incidence.

[COVID-19 pandemic: Impact on the rate of viral conjunctivitis]. / Pandemia COVID-19: impacto sobre la tasa de conjuntivitis virales.

OBJECTIVE: The COVID-19 pandemic led Spain to order a state of alert with the cessation of non-essential activities on 14 March 2020, and to implement public health interventions (such as home confinement) and other health recommendations to prevent the spread of the SARS-CoV-2 virus (hand washing and the obligation to wear face-masks). These factors could have influenced the rate of viral conjunctivitis. METHOD: In this retrospective, noninterventional, descriptive study, the incidence of viral conjunctivitis in an emergency department of a national hospital is compared over two distinct time periods: pre-COVID (13 March-30 September 2019, one year before the start of the pandemic) and COVID (13 March-30 September 2020). RESULTS: In the first period there were 436 cases of conjunctivitis, of which 168 (38.5%) were confirmed cases of viral conjunctivitis 168 (38.5%), while in the second period there were 121 recorded cases, of which the most frequent were allergic and traumatic (23 cases; 19% each group), bacterial (15 cases; 12.3%) and viral (15 cases; 12.3%). The diagnosis of viral conjunctivitis is the one that suffered the most significant relative reduction (48.5%), while other types of conjunctivitis hardly changed their relative frequency between these two periods of time. CONCLUSIONS: Viral conjunctivitis is the most frequent infectious disease of the eye and has a transmission rate similar to that of coronavirus, so the measures implemented could positively affect its incidence.

Características clínicas e histopatológicas de ojos enucleados por melanoma uveal en un hospital terciario en España / Clinical and histopathological features of choroidal melanoma-related enucleated eyes in a Spanish tertiary hospital

Objetivo: Estudiar las variables clínicas y anatomopatológicas de mal pronóstico en una muestra de pacientes con melanoma maligno de úvea que requirieron enucleación como tratamiento definitivo en un hospital terciario en Madrid (España) durante un período de tiempo de 6 años. Material y métodos: Estudio retrospectivo, observacional, longitudinal. Se analiza la presencia de factores clínicos y anatomopatológicos conocidos de mal pronóstico y otros en 30 melanomas malignos: 20 enucleados de novo (grupo A) y 10 tras recibir tratamiento con radioterapia (grupo B). Se estudia el grado de fiabilidad diagnóstica de la resonancia magnética nuclear, comparándola con la histología (gold standard) para predecir la presencia de invasión escleral y extraescleral. Resultados: El tamaño tumoral, la rotura de la membrana de Bruch, la invasión escleral y la proximidad al nervio óptico fueron los factores de mal pronóstico más determinantes. Se logró controlar la enfermedad en el 93% de los casos, con una incidencia de diseminación metastásica del 6% y una supervivencia del 100% a una media de seguimiento de 3 ± 1,5 (rango 1,2-6) años. La sensibilidad de la resonancia magnética nuclear, en nuestra población, para detectar infiltración escleral fue del 27%, y extraescleral, del 100%. Conclusiones: El análisis de los datos clínicos e histopatológicos recogidos justifican la enucleación como tratamiento final en los pacientes estudiados. La resonancia magnética nuclear no resultó un buen método de cribado para detectar la extensión escleral

Objective: To study clinical and pathological variables leading to a poor prognosis in a sample of uveal malignant melanoma patients who required eyeball enucleation as final treatment approach. All patients were seen and treated in the same public tertiary hospital in Madrid (Spain) within a 6-year time-period. Materials and methods: Longitudinal observational retrospective study. The presence of clinical and pathologic factors known to be linked to poor prognosis, as well as other features, was assessed in 30 malignant melanoma: 20 de novo-enucleated malignant melanoma eyes (group A), and 10 in eyes that received radiotherapy prior to enucleation (group B). The diagnostic reliability of magnetic resonance imaging was assessed by comparing it with the histology results (gold standard) as a means to detect scleral and extra-scleral extension. Results: Tumour size, Bruch's membrane rupture, scleral infiltration, and distance to the optic nerve were the most decisive factors for a poor prognosis in the study sample. In 93% of cases the condition was under control, with a 6% incidence rate of metastatic spread and a 100% rate of overall survival for a mean follow-up period of 3 ± 1.5 (range 1.2-6) years. In the study population, the sensitivity of the magnetic resonance imaging to detect scleral infiltration was 27%, which increased to 100% for identifying extra-scleral involvement. Conclusions: The analyses of the clinical and pathological data collected within the framework of this study justify enucleation as the treatment of choice for the patients of this study. Magnetic resonance imaging was not found to be an optimum screening method to detect scleral infiltration in this study sample

Clinical and histopathological features of choroidal melanoma-related enucleated eyes in a Spanish tertiary hospital. / Características clínicas e histopatológicas de ojos enucleados por melanoma uveal en un hospital terciario en España.

OBJECTIVE: To study clinical and pathological variables leading to a poor prognosis in a sample of uveal malignant melanoma patients who required eyeball enucleation as final treatment approach. All patients were seen and treated in the same public tertiary hospital in Madrid (Spain) within a 6-year time-period. MATERIALS AND METHODS: Longitudinal observational retrospective study. The presence of clinical and pathologic factors known to be linked to poor prognosis, as well as other features, was assessed in 30 malignant melanoma: 20 de novo-enucleated malignant melanoma eyes (group A), and 10 in eyes that received radiotherapy prior to enucleation (group B). The diagnostic reliability of magnetic resonance imaging was assessed by comparing it with the histology results (gold standard) as a means to detect scleral and extra-scleral extension. RESULTS: Tumour size, Bruch's membrane rupture, scleral infiltration, and distance to the optic nerve were the most decisive factors for a poor prognosis in the study sample. In 93% of cases the condition was under control, with a 6% incidence rate of metastatic spread and a 100% rate of overall survival for a mean follow-up period of 3±1.5 (range 1.2-6) years. In the study population, the sensitivity of the magnetic resonance imaging to detect scleral infiltration was 27%, which increased to 100% for identifying extra-scleral involvement. CONCLUSIONS: The analyses of the clinical and pathological data collected within the framework of this study justify enucleation as the treatment of choice for the patients of this study. Magnetic resonance imaging was not found to be an optimum screening method to detect scleral infiltration in this study sample.

Absceso iridiano tras endocarditis bacteriana en un paciente con leucemia. Diagnóstico diferencial / Iris abscess after bacterial endocarditis in a patient with leukaemia. Differential diagnosis

OBJETIVO: Describir un caso de absceso iridiano en un paciente con leucemia. CASO CLÍNICO: Varón, 46 años, con leucemia promielocítica y endocarditis presentó disminución de agudeza visual en ojo izquierdo (OI). A la exploración oftalmológica: en OI, lesión nodular iridiana a las 4 h con hipopión y exudado fibrinoso y en OD; tyndall +1. Cultivos de sangre y de humor acuoso dieron positivo a Staphylococcus aureus meticilina-sensible, descartando células blásticas en anatomía patológica. Se trató con antibióticos sistémicos con resolución completa de la inflamación. CONCLUSIÓN: El absceso iridiano es un foco inusual de émbolo séptico tras endocarditis bacteriana. En un paciente con leucemia es implescindible descartar metástasis extramedular porque condiciona el pronóstico

PURPOSE: To report a case of iris abscess due to bacterial endocarditis. CASE REPORT: A 46-year-old male under diagnosis of promielocitic leukemia and endocarditis presented with decreased vision in left eye (OS). Ophthalmic exploration revealed iris abscess and hypopyon with fibrinous exudate in iris of the left eye and tyndall +1 in right eye (OD). Blood culture and anterior chamber paracentesis was positive for methicillin-sensitive Staphylococcus aureus and negative for blastic cells in citology. Treatment with systemic antibiotic was initiated with total resolution of inflammation. CONCLUSION: Iris abscess is an unusual septic focus in bacterial endocarditis. It is crucial to rule out an extramedullary metastasis in a patient with leukemia due to the general prognosis

[Iris abscess after bacterial endocarditis in a patient with leukaemia. Differential diagnosis]. / Absceso iridiano tras endocarditis bacteriana en un paciente con leucemia. Diagnóstico diferencial.

PURPOSE: To report a case of iris abscess due to bacterial endocarditis. CASE REPORT: A 46-year-old male under diagnosis of promielocitic leukemia and endocarditis presented with decreased vision in left eye (OS). Ophthalmic exploration revealed iris abscess and hypopyon with fibrinous exudate in iris of the left eye and tyndall +1 in right eye (OD). Blood culture and anterior chamber paracentesis was positive for methicillin-sensitive Staphylococcus aureus and negative for blastic cells in citology. Treatment with systemic antibiotic was initiated with total resolution of inflammation. CONCLUSION: Iris abscess is an unusual septic focus in bacterial endocarditis. It is crucial to rule out an extramedullary metastasis in a patient with leukemia due to the general prognosis.

Role of inflammation in endophthalmitis.

Inflammation originating from infection of the vitreous cavity is called endophthalmitis. Attention has been focused on the epidemiologic, microbiologic reports, and treatment options; unfortunately, the role of the host immune reaction in the visual function damage is still not well understood. Endophthalmitis occurs most frequently after cataract surgery. In this paper we review the published literature regarding inflammatory mediators and apoptosis during the course of endophthalmitis. Toll-like receptors, cytokines, high-mobility group box 1 proteins, aB-crystallin and apoptosis have been studied during clinical and experimental cases of endophthalmitis. Further understanding of the host-immune reaction to vitreous infection is essential for the development of new therapies. The use of intravitreal antibiotics and corticosteroids, vitrectomy and systemic antibiotics for the preservation of visual function is still discouraging.

Siderosis bulbi. Presentación clínica de un caso de tres años de evolución / Siderosis bulbi. Clinical presentation of a case of three years from onset

Caso clínico: Se presentan las características clínicas y funcionales de un paciente de 30 años con siderosis bulbi de tres años de evolución, y el tratamiento mediante facoemulsificación y vitrectomía para la eliminación de los restos metálicos. Discusión: A pesar de que la mayoría de los cuerpos extraños intraoculares (CEIO) tienen un efecto deletéreo inmediato, en casos de cuerpos pequeños, localizados y con poca afectación visual, es posible su observación. Sin embargo, con el tiempo, el hierro se deposita en el epitelio pigmentado de la retina, produciendo cambios a nivel macular y periférico responsables de pérdida progresiva de visión. La cirugía de extracción del CEIO puede frenar la progresión de esta dolencia(AU)

Case report: The clinical and functional characteristics of a 30 years-old patient with three years-evolution siderosis bulbi are described in this paper, as well as the treatment using phacoemulsification and vitrectomy for the elimination of the metallic remains. Discussion: In spite of the fact that the majority of the intraocular foreign bodies (IOFB) have a dangerous immediate effect, in cases of small, local bodies and with little visual deterioration, observation is possible. Nevertheless, with time, the iron settles on the pigmented epithelium of the retina, producing changes at macula and peripheral level, which are responsible for the gradual loss of vision. The surgical removal of the IOFB can stop the progression of this pathology(AU)

[Siderosis bulbi. Clinical presentation of a case of three years from onset]. / Siderosis bulbi. Presentación clínica de un caso de tres años de evolución.

CASE REPORT: The clinical and functional characteristics of a 30 years-old patient with three years-evolution siderosis bulbi are described in this paper, as well as the treatment using phacoemulsification and vitrectomy for the elimination of the metallic remains. DISCUSSION: In spite of the fact that the majority of the intraocular foreign bodies (IOFB) have a dangerous immediate effect, in cases of small, local bodies and with little visual deterioration, observation is possible. Nevertheless, with time, the iron settles on the pigmented epithelium of the retina, producing changes at macula and peripheral level, which are responsible for the gradual loss of vision. The surgical removal of the IOFB can stop the progression of this pathology.

[Nosocomial outbreak of epidemic keratoconjunctivitis in a neonatal intensive care unit]. / Brote nosocomial de queratoconjuntivitis epidémica en una unidad de cuidados intensivos neonatal.

OBJECTIVE: To describe an epidemic nosocomial outbreak of keratoconjunctivitis affecting at least 43 people in a Neonatal Intensive Care Unit in Madrid, between May and October 2002, perform epidemiologic research and determine preventive measures to prevent new outbreaks. METHODS: Description of the outbreak, clinical case definition, microbiologic and epidemiologic research through the use of questionnaires. Analysis of the incidence of subepithelial infiltrates 1 year after infection and the use of topical corticosteroid therapy. RESULTS: The epidemic began in the Neonatal Service, with a pair of twins being found as the initial focus. Dissemination occurred to about 24 workers of the unit, and 19 workers from other services. The microbiologic diagnosis confirmed adenovirus in 10 conjunctival smears and one serologically, with the remainder obeying clinical and epidemiological criteria of such infection. Infected patients using topical corticosteroids had a higher incidence of infiltrates 12 months later than those not using such agents (p=0.003 in Fisher test). CONCLUSIONS: Epidemic keratoconjunctivitis occurs frequently, is highly contagious and has possible long-term sequelae, necessitating the use of preventive measures to avoid spread and new outbreaks.

Brote nosocomial de queratoconjuntivitis epidémica en una unidad de cuidados intensivos neonatal / Nosocomial outbreak of epidemic keratoconjunctivitis in a neonatal intensive care unit

Objetivos: Descripción de un brote nosocomial epidémico de queratoconjuntivitis ocurrido en Madrid (Unidad de Cuidados Intensivos Neonatal) entre los meses de mayo y octubre de 2002 y que afectó al menos a 43 trabajadores del centro; investigación del posible origen y valoración de secuelas. Medidas preventivas para evitar nuevos brotes. Material y métodos: Estudio descriptivo del brote, definición de caso clínico, investigación microbiológica y epidemiológica mediante encuesta. Análisis de la relación entre la tasa de infiltrados subepiteliales 1 año después de la infección y la tasa de uso de corticoide tópico. Resultados: El brote epidémico empezó en el Servicio de Neonatología, encontrándose como focos iniciales unos gemelos prematuros ingresados en dicha unidad. La diseminación se produjo en 24 trabajadores de la unidad, y otros 19 trabajadores de otros Servicios. El diagnóstico microbiológico contrafirma infección por adenovirus en 10 exudados conjuntivales y una serología, el resto cumple criterios clínicos y epidemiológicos. Aunque es una muestra pequeña y no concluyente, en este estudio los pacientes que usaron corticoide tópico tienen mayor tasa de infiltrados que los que no usaron (p = 0,003 en test exacto de Fisher). Conclusiones: La queratoconjuntivitis epidémica es una enfermedad frecuente y en la mayoría banal, pero su alta tasa de contagiosidad y sus posibles secuelas requieren que se preste mayor atención a las medidas preventivas para evitar nuevos brotes

Objective: To describe an epidemic nosocomial outbreak of keratoconjunctivitis affecting at least 43 people in a Neonatal Intensive Care Unit in Madrid, between May and October 2002, perform epidemiologic research and determine preventive measures to prevent new outbreaks. Methods: Description of the outbreak, clinical case definition, microbiologic and epidemiologic research through the use of questionnaires. Analysis of the incidence of subepithelial infiltrates 1 year after infection and the use of topical corticosteroid therapy. Results: The epidemic began in the Neonatal Service, with a pair of twins being found as the initial focus. Dissemination occurred to about 24 workers of the unit, and 19 workers from other services. The microbiologic diagnosis confirmed adenovirus in 10 conjunctival smears and one serologically, with the remainder obeying clinical and epidemiological criteria of such infection. Infected patients using topical corticosteroids had a higher incidence of infiltrates 12 months later than those not using such agents (p=0.003 in Fisher test). Conclusions: Epidemic keratoconjunctivitis occurs frequently, is highly contagious and has possible long-term sequelae, necessitating the use of preventive measures to avoid spread and new outbreaks

[Bilateral sixth nerve and left third nerve palsy after head trauma]. / Parálisis del VI par bilateral y III par izquierdo postraumático.

CASE REPORT: To describe a case of combined bilateral cranial nerve palsy of traumatic origin. To determine the lesions that produce the symptoms is useful to define the final prognosis and the best treatment. DISCUSSION: We report the case of a patient who developed a bilateral sixth nerve and left third nerve palsy after head trauma. The underlying lesion was a diffuse axonal injury. After an observation period during which no spontaneous improvement occurred, we administered botulinum toxin with a successful clinical result. Bilateral combined traumatic cranial nerve palsies are rare. When a diffuse axonal injury is present, the chance of spontaneous resolution is poor.

Parálisis del VI par bilateral y III para izquierdo postraumático / Bilateral sixth nerve and left third nerve palsy after nead trauma

Caso clínico: Describir un caso de parálisis bilateral combinada de origen traumático. Conocer las lesiones que ocasionan la clínica nos es útil para inferir el pronóstico final y tratamiento más adecuado.Discusión: Presentamos un paciente con una parálisis del III par izquierdo y VI par bilateral de origen traumático. El daño anatomofuncional era una lesión axonal difusa. Tras un período de observación sin presentar mejoría se realizó una inyección de toxina botulínica con la que mejoró clínicamente. Las lesiones de pares craneales combinadas y bilaterales traumáticas son infrecuentes. Si son por un daño axonal difuso las expectativas empeoran

Case report: To describe a case of combined bilateral cranial nerve palsy of traumatic origin. To determine the lesions that produce the symptoms is useful to define the final prognosis and the best treatment.Discussion: We report the case of a patient who developed a bilateral sixth nerve and left third nerve palsy after head trauma. The underlying lesion was a diffuse axonal injury. After an observation period during which no spontaneous improvement occurred, we administered botulinum toxin with a successful clinical result. Bilateral combined traumatic cranial nerve palsies are rare. When a diffuse axonal injury is present, the chance of spontaneous resolution is poor

[Treatment of nasolacrimal duct obstruction with Song's stent. Long term efficacy]. / Tratamiento de la obstrucción del conducto naso-lagrimal mediante prótesis de Song. Eficacia a largo plazo.

PURPOSE: To evaluate the long-term efficacy (5 years) of Song's stent in the treatment of naso-lachrymal duct obstruction. MATERIALS AND METHODS: We examined Song's stents installed in 64 eyes from 62 patients with naso-lachrymal duct obstruction (NLD). Of the 64, 48 were women and 14 men of mean age 60 SD 13.17 years. Obstructions of right side 62.5% and left side 37.5%, and location in dacriocystography: sac-NLD junction 82.8%, distant NLD 10.9%, medium NLD 3.1% and both proximal and complete NLD 1.6%. CLINICAL PRESENTATION: chronic epiphora 96.8%, acute dacriocystitis 67.2%, purulent discharge 25% and mucocele 17.2%. Mean follow-up period was 25.23 months. RESULTS: 13 stents were removed and 2 changed during the follow-up. 67.2% were patent at the end of the study; epiphora reduced to 32.8%, number of acute dacryocystitis, purulent discharge and mucocele to 1.6%. Subjective improvement was found in 73.5%. Surgical complications included epistaxis (15.6%) and pain (14.1%), and post-operative complications included reobstruction in 22 cases within a mean time of 8.6 months. CONCLUSIONS: Song's stent is a quick and useful option in treatment of epiphora. Despite not being efficient in all cases, it leads to improvement of symptoms and avoidance of surgery in the majority of cases. However, it requires periodical washes to maintain its patency.

Tratamiento de la obstrucción del conducto naso-lagrimal mediante prótesis de Song: Eficacia a largo plazo / Treatment of nasolacrimal duct obstruction with songs stent. Long term efficacy

Objetivo: Evaluar la eficacia a largo plazo (5 años) de la prótesis nasolagrimal de Song en el tratamiento de la obstrucción del conducto naso-lagrimal. Material y métodos: Se estudiaron 64 ojos (62 pacientes) con prótesis de Song por obstrucción del conducto naso-lagrimal (CNL), 48 mujeres y 14 hombres de edad media 60 años DE 13,17. El lado más frecuentemente obstruido fue el derecho (62,5%), siendo en el ojo izquierdo de 37,5%; y el tipo de obstrucción en la dacriocistografía: unión CNL-saco 82,8%, CNL distal 10,9%, CNL medio 3,1%, y proximal y completo, ambos del 1,6%. La clínica previa más frecuente fue la epífora (96,8%), dacriocistitis aguda (67,2%), conjuntivitis de repetición (25%) y mucocele (17,2%). El tiempo medio de seguimiento fue de 25,23 meses (máximo 53 y mínimo 2). Resultados: Durante el seguimiento se retiraron 13 prótesis y recambiaron 2. Al final siguen permeables 43 (67,2%); la epífora se redujo al 32,8% y el número de episodios de dacriocistitis aguda, conjuntivitis de repetición y mucocele se redujo al 1,6%. El 73,5% de los encuestados manifestaron una mejoría subjetiva. La complicación intraoperatoria más frecuente fue la epístaxis (15,6%) y dolor (14,1%), y de las post-operatorias la obstrucción en 22 casos, con un tiempo medio de 8,6 meses. Conclusiones: La prótesis de Song es una opción útil y rápida en el tratamiento de las obstrucciones del CNL. Pese a no ser eficaz en todos, produce una mejoría sintomática en la mayoría, permitiendo evitar la cirugía. No obstante, se requieren lavados periódicos para mantener su permeabilidad(AU)

Purpose: To evaluate the long-term efficacy (5 years) of Songs stent in the treatment of naso-lachrymal duct obstruction. Materials and methods: We examined Songs stents installed in 64 eyes from 62 patients with naso-lachrymal duct obstruction (NLD). Of the 64, 48 were women and 14 men of mean age 60 SD 13.17 years. Obstructions of right side 62.5% and left side 37.5%, and location in dacriocystography: sac-NLD junction 82.8%, distant NLD 10.9%, medium NLD 3.1% and both proximal and complete NLD 1.6%. Clinical presentation: chronic epiphora 96.8%, acute dacriocystitis 67.2%, purulent discharge 25% and mucocele 17.2%. Mean follow-up period was 25.23 months. Results: 13 stents were removed and 2 changed during the follow-up. 67.2% were patent at the end of the study; epiphora reduced to 32.8%, number of acute dacryocystitis, purulent discharge and mucocele to 1.6%. Subjective improvement was found in 73.5%. Surgical complications included epistaxis (15.6%) and pain (14.1%), and post-operative complications included reobstruction in 22 cases within a mean time of 8.6 months. Conclusions: Songs stent is a quick and useful option in treatment of epiphora. Despite not being efficient in all cases, it leads to improvement of symptoms and avoidance of surgery in the majority of cases. However, it requires periodical washes to maintain its patency(AU)

Amaurosis bilateral como secuela de la intoxicación aguda por metanol: a propósito de un caso / Bilateral blindness as a consequence of acute methanol intoxication: a case report

La intoxicación por metanol supone una preocupación para la salud pública y ambiental por las acciones selectivas de su metabolito neurotóxico, formaldehído en la retina, nervio óptico y sistema nervioso central. Se presenta un caso de ceguera por metanol y se discute su fisiopatología, diagnóstico y tratamiento. Pese a que esta neuropatía es rara actualmente, el diagnóstico precoz y el tratamiento adecuado son cruciales para mejorar el pronóstico (AU)