Langerhans cell histiocytosis mimicking acute dacryocystitis.

Langerhans cell histiocytosis (LCH) is a myeloid neoplasm characterized by clonal neoplastic proliferation of Langerhans-type dendritic cells associated with an inflammatory infiltrate predominantly composed of lymphocytes and eosinophils. In this article, we present an unusual case of LCH with significant swelling in the left lacrimal sac region in a 3-year-old child, clinically mimicking acute dacryocystitis. Microscopically, it showed intense inflammatory infiltrate and histiocytes with irregular nuclei. The tumor cells were positive for S-100 protein, CD1a, and CD207 (langerin). Molecular study was positive for the V600E/E2/D mutation (EXON 15). This case emphasizes the importance of careful clinical, radiographic, and microscopic evaluation, as some neoplasms may mimic common benign lesions.

Prevalence of metastases outside the liver and abdominal lymph nodes on 68Ga-DOTATOC-PET/CT in patients with small intestinal and pancreatic neuroendocrine tumours.

Metastases outside the liver and abdominal/retroperitoneal lymph nodes are nowadays detected frequently in patients with neuroendocrine tumours (NETs), owing to the high sensitivity of positron emission tomography (PET) with Gallium-68-DOTA-somatostatin analogues (68Ga-SSA) and concomitant diagnostic computed tomography (CT). Our aim was to determine the prevalence of extra-abdominal metastases on 68Ga-DOTATOC-PET/CT in a cohort of patients with small intestinal (Si-NET) and pancreatic NET (Pan-NET), as well as that of pancreatic metastasis in patients with Si-NET. Among 2090 patients examined by 68Ga-DOTATOC-PET/CT at two tertiary referral centres, a total of 1177 patients with a history of Si- or Pan-NET, were identified. The most recent 68Ga-DOTATOC-PET/CT report for each patient was reviewed, and the location and number of metastases of interest were recorded. Lesions outside the liver and abdominal nodes were found in 26% of patients (n = 310/1177), of whom 21.5% (255/1177) were diagnosed with Si-NET and 4.5% (55/1177) Pan-NET. Bone metastases were found in 18.4% (215/1177), metastases to Virchow's lymph node in 7.1% (83/1177), and lung/pleura in 4.8% (56/1177). In the subset of 255 Si-NET patients, 5.4% (41/255) manifested lesions in the pancreas, 1.5% in the breast (18/255), 1.3% in the heart (15/255) and 1% in the orbita (12/255). In Si-NET patients, the Ki-67 proliferation index was higher in those with ≥2 metastatic sites of interest, than with 1 metastatic site, (p <0.001). Overall, extra-abdominal or pancreatic metastases were more often found in patients with Si-NET (34%) than in those with Pan-NET (13%) (p <0.001). Bone metastases were 2.6 times more frequent in patients with Si-NET compared to Pan-NET patients (p <0.001). Lesions to the breast and orbita were encountered in almost only Si-NET patients. In conclusion, lesions outside the liver and abdominal nodes were detected in as many as 26% of the patients, with different prevalence and metastatic patterns in patients with Si-NET compared to Pan-NET. The impact of such metastases on overall survival and clinical decision-making needs further evaluation.

Avaliação da utilização de biomateriais aloplásticos na reconstrução orbital

Objetivo: analisar a utilização de materiais aloplásticos reabsorvíveis e não reabsorvíveis na reconstrução óssea orbital. Métodos: realizado uma revisão de literatura integrativa de natureza exploratória. Resultados: O diagnóstico e o tratamento de lesões traumáticas faciais obtiveram grande progresso nas últimas décadas, tratando-se de um trauma de abrangência multidisciplinar, que envolve especialidades odontológicas e médicas. Sequelas do inadequado tratamento das fraturas orbitárias, como exoftalmia, restrição da mobilidade ocular e distopia ocular ou orbital, representam problemas estéticos e funcionais muito difíceis, senão impossíveis de serem corrigidos. Verificou-se que em fraturas do tipo blow-out, o titânio é um material favorável a osseointegração, já em regiões estéticas a hidroxiapatita e cimentos de fosfato de cálcio são materiais que conseguem devolver uma anatomia adequada. Tratando-se de materiais reabsorvíveis, que são de fácil manipulação, deve-se tomar cuidado as possíveis reações teciduais, porém não existe um critério de escolha ideal, mas sim, a análise de suas vantagens e desvantagens em cada caso. Conclusão: ainda não existe consenso sobre o melhor material para fraturas de órbitas, por isso, deve-se sempre analisar suas vantagens e desvantagens de acordo com o grau da fratura do paciente, sendo uma decisão do cirurgião responsável.

Resultados quirúrgicos de pacientes con lesiones orbitarias a través de abordajes mínimamente invasivos

Introducción: Los abordajes mínimamente invasivos a la órbita constituyen métodos novedosos para el tratamiento quirúrgico de las lesiones orbitarias. Objetivos: Describir los resultados quirúrgicos de los abordajes mínimamente invasivos en pacientes con lesiones orbitarias. Método: Se realizó un estudio descriptivo retrospectivo, que incluyó a 33 pacientes del Hospital Hermanos Ameijeiras con diagnóstico de lesiones orbitarias, operados mediante abordajes mínimamente invasivos con apoyo endoscópico, con sus diferentes variables: abordajes empleados, resultados posquirúrgicos y complicaciones. Se determinó de forma posoperatoria el grado de resección imagenológica, evaluación visual, estado de la enfermedad y complicaciones. Para el análisis de los datos se utilizaron frecuencias absolutas y relativas como medidas resumen. Resultados: Existió predominio de abordajes endonasales endoscópicos extendidos a la órbita en el 48, 5 %. Se alcanzó 90,9 % de resección total de las lesiones. Entre las complicaciones: diplopía 6,1 %, enoftalmos, ptosis, infección y hematoma, 3,0 % respectivamente. Conclusiones: Los abordajes mínimamente invasivos a la órbita con apoyo endoscópico constituyen procedimientos seguros, efectivos y con baja tasa de complicaciones.

Introduction: Minimally invasive approaches to the orbit constitute novel methods for the surgical treatment of orbital lesions. Objectives: To describe the surgical results of minimally invasive approaches in patients with orbital lesions. Method: A descriptive retrospective study was carried out, which included 33 patients from the Hermanos Ameijeiras Hospital with a diagnosis of orbital lesions operated on using minimally invasive approaches with endoscopic support with their different variables: approaches used, post-surgical results and complications. The degree of imaging resection, visual evaluation, disease status, and complications were determined postoperatively. For data analysis, absolute and relative frequencies were used as summary measures. Results: A predominance of endoscopic endonasal approaches extended to the orbit was evident in 48.5%. A 90.9% total resection of the lesions was achieved. Among the complications: diplopia 6.1%, enophthalmos, ptosis, infection and hematoma, 3.0 % respectively. Conclusions: Minimally invasive approaches to the orbit with endoscopic support are safe, effective procedures with a low complication rate.

Orbital shape in goat and sheep: Symmetric analysis.

The aim of this study is to evaluate orbital symmetry in goat and sheep skulls. For this purpose, a total of 83 skulls, including 50 sheep and 33 goat skulls, were used in the study. Geometric morphometry method was applied. For symmetric analysis, one side of each orbit was photographed twice and mirror images were created. There were 36 landmards marked to determine the outer limit of the orbita. As a result of the study, asymmetric components (fluctuating asymmetry and directional asymmetry) for shape were statistically significant in both goats and sheep (p < 0.0001). The first three principal components explained 52.558% of the total shape variation in goats and 61.245% in sheep. This value for symmetric components was 59.095% and 67.742% for goats and sheep, respectively, and 66.791% and 71.154% for asymmetric components. As a result of discriminant function analysis, right and left orbital shapes showed grouping characteristics with similar success rates according to species. Although limited, the right orbit in goats (100%) and the left orbit in sheep (96.5%) were grouped more accurately.

Abordagem cirúrgica de fratura blow-out através de acesso transconjuntival: relato de caso / Surgical approach to blow-out fracture through transconjunctival access: case report

Introdução: a região orbitária é bastante suscetível a fraturas, devido a sua posição exposta e a ossos frágeis. As fraturas do tipo blow-out caracterizam-se pela fratura do assoalho orbitário com ou sem herniação de conteúdo para o seio maxilar, gerando consequências funcionais e estéticas. Relato do caso: paciente do sexo feminino, 48 anos de idade, vítima de queda da própria altura, compareceu ao Hospital Geral do Estado da Bahia com queixa de diplopia, apresentando fratura de assoalho de órbita direita. Foi programada uma abordagem transconjuntival e instalação de tela de titânio para reconstrução. Na alta hospitalar, a paciente negou diplopia, não apresentando prejuízos funcionais ou estéticos. Conclusão: o acesso transconjuntival possibilita uma adequada exposição do assoalho de órbita, para colocação de telas, deixando uma cicatriz imperceptível na conjuntiva. Apesar das vantagens, este acesso cirúrgico apresenta maior complexidade técnica, sendo pouco realizado pelos cirurgiões

Introduction: the orbital region is very susceptible to fractures due to its exposed position and fragile bones. Blow-out fractures are characterized by fractures of the orbital floor with or without herniation of contents to the maxillary sinus, generating functional and aesthetic consequences. Case report: a 48-year-old female patient, victim of a fall from her height, presented to the General Hospital of the State of Bahia complaining of diplopia, presenting with a fracture of the floor of the right orbit. A transconjunctival approach and installation of titanium mesh for reconstruction were scheduled. At hospital discharge, the patient denied diplopia, with no functional or aesthetic impairments. Conclusion: the transconjunctival approach allows adequate exposure of the orbital floor for mesh placement, leaving an imperceptible scar on the conjunctiva. Despite the advantages, this surgical approach presents greater technical complexity and is rarely performed by surgeons.

The refractory secondary hyperparathyroidism presenting with retro-orbital brown tumor: a case report.

BACKGROUND: Tertiary hyperparathyroidism describes the autonomous and excessive secretion of parathyroid hormone (PTH) by the parathyroid glands after longstanding secondary hyperparathyroidism in chronic kidney disease. Brown tumors are a sign of uncontrolled hyperparathyroidism. In this case, we have reported a refractory and destructive hyperparathyroidism storm. Also, it presented with atypical onset and unexpected adenoma location. CASE PRESENTATION: A 37-year-old man was diagnosed with end-stage kidney disease 22 years ago. He has been undergoing dialysis treatment since that time. Recently, he was admitted to the ophthalmology department due to the unilateral anterior bulging of the right eye and drooping of the eyelid. Magnetic resonance imaging exhibited an extraconal mass lesion located in the right orbital posterior superolateral position. Computerized tomography scans considered expansile bone lesion with peripheral calcification and originating from the sphenoid wing. The bone mass lesion was resected via craniotomy due to the compressive effect. The pathological findings were consistent with brown tumors. Plasma intact PTH level was 4557 pg/mL. The patient informed that he underwent parathyroidectomy and two leg fractures operation in a medical query. Parathyroid scintigraphy determined three distinct foci consistent with adenomas and one of them was in mediastenum. Second parathyroidectomy was recommended to the patient but the patient refused surgery. Despite his medication and dialysis regimen being revised, PTH levels were maintained at higher levels in follow-up. CONCLUSIONS: We presented a hyperparathyroidism case that was resistant to all treatments and exhibited all the severe complications in a long-term dialysis patient. Furthermore, this case has revealed the importance and difficulty of secondary hyperparathyroidism management.

The ability of contemporary cardiologists to judge the ischemic impact of a coronary lesion visually.

BACKGROUND: Landmark trials showed that invasive pressure measurement (Fractional Flow Reserve, FFR) was a better guide to coronary stenting than visual assessment. However, present-day interventionists have benefited from extensive research and personal experience of mapping anatomy to hemodynamics. AIMS: To determine if visual assessment of the angiogram performs as well as invasive measurement of coronary physiology. METHODS: 25 interventional cardiologists independently visually assessed the single vessel coronary disease of 200 randomized participants in The Objective Randomized Blinded Investigation with optimal medical Therapy of Angioplasty in stable angina trial (ORBITA). They gave a visual prediction of the FFR and Instantaneous Wave-free Ratio (iFR), denoted vFFR and viFR respectively. Each judged each lesion on 2 occasions, so that every lesion had 50 vFFR, and 50 viFR assessments. The group consensus visual estimates (vFFR-group and viFR-group) and individual cardiologists' visual estimates (vFFR-individual and viFR-individual) were tested alongside invasively measured FFR and iFR for their ability to predict the placebo-controlled reduction in stress echo ischemia with stenting. RESULTS: Placebo-controlled ischemia improvement with stenting was predicted by vFFR-group (p < 0.0001) and viFR-group (p < 0.0001), vFFR-individual (p < 0.0001) and viFR-individual (p < 0.0001). There were no significant differences between the predictive performance of the group visual estimates and their invasive counterparts: p = 0.53 for vFFR vs FFR and p = 0.56 for viFR vs iFR. CONCLUSION: Visual assessment of the angiogram by contemporary experts, provides significant additional information on the amount of ischaemia which can be relieved by placebo-controlled stenting in single vessel coronary artery disease.

Lacrimal gland pleomorphic adenoma: a narrative review / Adenoma pleomórfico de glândula lacrimal: uma revisão narrativa

ABSTRACT We present a literature review of 57 publications describing this pathology, published from the year 2012. In all these studies patients were reported to depict a slow-growing, motionless mass, which is painless at most times. All cases were managed by total excision, except for one report where adjuvant radiotherapy was applied. Among the several therapeutic strategies, the total tumor resection, preserving the tumor pseudocapsule intact, appears to be a consensus in treating the disease efficiently. Furthermore, fine-needle aspiration biopsy, including the assessment of genetic alterations, has proved to be a valuable tool in the diagnosis of challenging cases. Our literature survey also suggests that an incisional biopsy before the surgery may lead to the pseudocapsule disruption, thus considerably increasing the chances of adenoma recurrence, enabling its malignization. At present, genetics studies indicate that the molecular aberrations involved in the adenoma are similar to those represented in the salivary gland tumor pathogenesis. Further, in the recurrent cases, the pathology becomes difficult to treat and multiple surgeries may be required, occasionally, leading to radical surgery treatment.

RESUMO Uma revisão narrativa da literatura de 57 publicações que descrevem esta patologia, publicada a partir de 2012. Os pacientes têm uma massa de crescimento lento e imóvel, que na maioria das vezes é indolor. Todos os casos foram tratados por excisão total, com exceção de um relatório de radioterapia adjuvante. Entre as estratégias terapêuticas encontradas, a ressecção total do tumor, preservando a pseudocápsula tumoral intacta, parece ser um consenso. Alternativamente, a biópsia por aspiração de agulha fina incluindo a avaliação de alterações genéticas pode representar uma ferramenta valiosa nos casos diagnósticos desafiadores. Uma biópsia incisional antes da cirurgia não é recomendada, pois a ruptura da pseudocápsula aumenta consideravelmente a recorrência do adenoma, permitindo até mesmo sua malignização. Com relação à genética, estudos atuais indicam que as aberrações moleculares envolvidas no adenoma são semelhantes às da patogênese do tumor da glândula salivar. Para casos de recorrência, a patologia torna-se difícil de tratar e múltiplas cirurgias podem ser necessárias, às vezes levando a um tratamento cirúrgico radical.

Trauma ocular pediátrico y repercusiones visuales. Revisión sistemática

Introducción: En 2016, aproximadamente 55 millones de pacientes en todo el mundo sufrieron lesiones oculares. La carga de sufrimiento tras las lesiones oculares es muy alta, sobre todo por las consecuencias de estas lesiones, que son en gran parte responsables de la ceguera monocular. Objetivo: Sistematizar los referentes teóricos sobre el trauma ocular pediátrico y su impacto en los resultados visuales. Método: Se realizó una revisión sistemática del trauma ocular pediátrico y su impacto en los resultados visuales, basada en la literatura publicada en PubMed, Trip Medical Database y British Medical Journal en el periodo 2018-2022. El nivel de evidencia se evaluó mediante la escala de Oxford y se determinó el sexo, la edad, el tipo de lesión ocular, lugar de ocurrencia del trauma ocular y secuelas postlesión reportadas. Resultados: La evidencia recolectada fue principalmente de estudios retrospectivos de corte transversal que corresponde a nivel de evidencia según escala de Oxford 2b. El trauma ocular fue más común en niños (77 %) que en niñas (23 %) y la edad promedio fue de 10,5±1,96 años. Hubo mayor incidencia de trauma ocular cerrado (56%). Los lugares fuera del domicilio fueron los más reportados (64%). En lo que refiere a las consecuencias de los traumatismos oculares en edades pediátricas se pudo observar que la mayor frecuencia reportada fue la no presencia de secuelas (52,16 %), contra el 48,47 % de los repostados con secuelas. Conclusiones: Existen consideraciones básicas que se pueden comunicar al paciente que pueden prevenir efectos graves o permanentes en la visión. El examen oftalmológico profesional permite una evaluación temprana y evita complicaciones por subestimar la lesión ocular aguda.

Introduction: In 2016, approximately 55 million patients worldwide suffered eye injuries. The burden of suffering after eye injuries is very high, especially due to the consequences of these injuries, which are largely responsible for monocular blindness. Objective: To systematize the theoretical references on pediatric ocular trauma and its impact on visual results. Method: A systematic review of pediatric ocular trauma and its impact on visual outcomes was carried out, based on the literature published in PubMed, Trip Medical Database and British Medical Journal in the period 2018-2022. The level of evidence found was evaluated using the Oxford scale and the sex, age, type of ocular injury, place of occurrence of the ocular trauma and reported post-injury sequelae were determined. Results: The evidence collected was mainly from retrospective cross-sectional studies that correspond to the level of evidence according to the Oxford 2b scale. Ocular trauma was more common in boys (77%) than in girls (23%) and the average age was 10.5±1.96 years. There was a higher incidence of blunt ocular trauma (56%). Places outside the home were the most reported (64%). Regarding the consequences of ocular trauma in pediatric ages, it could be observed that the highest frequency reported was the absence of sequelae (52.16%), compared to 48.47% of those refueled with sequelae. Conclusions: There are basic considerations that can be communicated to the patient that can prevent serious or permanent effects on vision. Professional ophthalmological examination allows early evaluation and avoids complications due to underestimation of acute eye injury.

Introdução: Em 2016, aproximadamente 55 milhões de pacientes em todo o mundo sofreram lesões oculares. A carga de sofrimento após lesões oculares é muito elevada, especialmente devido às consequências destas lesões, que são em grande parte responsáveis pela cegueira monocular. Objetivo: Sistematizar os referenciais teóricos sobre trauma ocular pediátrico e seu impacto nos resultados visuais. Método: Foi realizada uma revisão sistemática sobre trauma ocular pediátrico e seu impacto nos resultados visuais, com base na literatura publicada no PubMed, Trip Medical Database e British Medical Journal no período 2018-2022. O nível de evidência encontrado foi avaliado pela escala de Oxford e foram determinados sexo, idade, tipo de lesão ocular, local de ocorrência do trauma ocular e sequelas pós-lesão relatadas. Resultados: As evidências coletadas foram principalmente provenientes de estudos transversais retrospectivos que correspondem ao nível de evidência da escala Oxford 2b. O trauma ocular foi mais comum em meninos (77%) do que em meninas (23%) e a idade média foi de 10,5±1,96 anos. Houve maior incidência de trauma ocular contuso (56%). Os locais fora de casa foram os mais relatados (64%). Quanto às consequências do trauma ocular em idade pediátrica, pôde-se observar que a maior frequência relatada foi a ausência de sequelas (52,16%), contra 48,47% dos reabastecidos com sequelas. Conclusões: Existem considerações básicas que podem ser comunicadas ao paciente e que podem prevenir efeitos graves ou permanentes na visão. O exame oftalmológico profissional permite avaliação precoce e evita complicações por subestimação da lesão ocular aguda.

Treatment of orbital lymphatic malformation with oral sirolimus: a case report / Malformação linfática orbital tratada com sirolimo oral: relato de caso

ABSTRACT It is estimated that lymphatic malformations in children account for 6% of all benign vascular malformations. New medical therapies have been developed for the management of lymphatic orbital disease. The purpose of this article was to describe a clinical case of orbital venolymphatic malformation in a 10-year-old boy, causing proptosis and palpebral edema. The lesion was initially treated with local sclerotherapy. However, the lesion relapsed, and was successfully treated with oral sirolimus. Prospective studies are warranted to determine the appropriate dose and extend the indications of sirolimus in these patients.

RESUMO A incidência de malformações linfáticas em crianças é estimada em 6% de todas as malformações vasculares benignas. Têm sido desenvolvidos novos tratamento para doenças linfáticas orbitárias. Nosso objetivo é descrever um caso clínico de malformação venolinfática orbitária em um menino de 10 anos de idade, causando proptose e edema palpebral. A lesão foi tratada inicialmente com escleroterapia local. No entanto, a lesão teve recidiva e foi tratada com sucesso com sirolimo oral. Ainda são necessários estudos prospectivos para estabelecer a dose apropriada e a duração do tratamento com sirolimo nesses pacientes.

Orbitopatía tiroidea. Puntos clave para el diagnóstico y tratamiento / Thyroid orbitopathy. Tricks for diagnosis and treatment

La orbitopatía tiroidea (OT) es una patología autoinmune de etiología desconocida. Se trata de una enfermedad edematosa e inflamatoria crónica y a veces subaguda o aguda, cuyas características principales son edema palpebral, úlceras corneales, hipertensión ocular, exoftalmos generalmente bilateral, estrabismo restrictivo, diplopía y neuropatía óptica. El objetivo principal es realizar una revisión y actualización acerca del enfoque diagnóstico y terapéutico de la OT. Realizar una revisión y actualización acerca del enfoque diagnóstico, terapéuticos de la OT. Métodos: Revisión de la literatura publicada referente a la OT y manera actual de enfocar esta patología. Resultados: La OT es una enfermedad inflamatoria orbitaria con un posible origen autoinmune y que suele asociarse a trastornos metabólicos de la glándula tiroidea. Fisiopatológicamente su mecanismo no está claro. Afecta mayormente a mujeres y está negativamente influenciada por factores como el tabaquismo, la edad, el sexo y la raza. Es imprescindible clasificarla en cuanto a su severidad y su actividad para un correcto manejo. Conclusiones: El conocimiento clínico de OT es esencial para el diagnóstico precoz de la enfermedad. El tratamiento médico, en caso de OT activa, debe ser precoz, agresivo y acorde a la fase en que se presente el paciente con el fin de evitar las graves consecuencias de la OT. El tratamiento quirúrgico deberá ser lógico y ordenado, pero a su vez rápido, con el fin de devolver al paciente al entorno laboral, social y familiar. (AU)

Purpose: Thyroid orbitopathy (TO) is an autoimmune disease of unknown etiology. It is a chronic and sometimes subacute or acute edematous and inflammatory disease, the main characteristics of which are eyelid edema, corneal ulcers, ocular hypertension, generally bilateral exophthalmos, restrictive strabismus, diplopia and optic neuropathy. The main purpose of this work is to review and update the current diagnostic and therapeutic approaches. To propose a practical, basic and precocious approach based in the knowledge of the TO. Methods: Literature review and exposition of our experience in the management of TO. Results: TO is an inflammatory orbital disease that probably has an autoimmune origin and most of the time is related to systemic disorders of the thyroid gland. Pathogenesis of the disease is not yet fully understood. Women are more likely to develop TO, and the disease is clearly affected by several factors such as smoking, age, sex and race. It is crucial to determine TO severity and activity for a correct management. Conclusions: Clinical knowledge is essential for the early diagnosis of this disorder, and it is the most important factor for the proper management of the disease. The medical treatment must be initiated promptly and should be aggressive and based in the current phase of the disease, in order to avoid the severe damage that follows TO. The surgical approach must be logical and sequential, but, on the other hand, must be rapid and aggressive in order to return the patient to his/her labour, social and familiar environment. (AU)

La lipotransferencia como complemento seguro en la reconstrucción orbitaria / Lipotransfer as a Safe Adjunct in Orbital Reconstruction

Los defectos periorbitarios independientemente de su causa, suelen relacionarse con los servicios médicos oftalmológicos; sin embargo, en ocasiones requieren de la intervención del cirujano plástico. La pérdida de un globo ocular tiene repercusiones funcionales, estéticas y psicológicas en las personas que la sufren. Puede exponer asimetrías de los tejidos subyacentes más profundos que mejoran con el lipoinjerto al devolver los contornos de los tejidos blandos alrededor del ojo. El objetivo de presentar esta serie de casos es mostrar la utilidad del lipoinjerto autólogo asistido con células madre del tejido adiposo como complemento de la reconstrucción de la órbita. Se presentan tres casos que acudieron al servicio de Cirugía Plástica del Hospital Clínico Quirúrgico Hermanos Ameijeiras remitidas desde el servicio de Cirugía Plástica Ocular del Instituto Cubano de Oftalmología Ramón Pando Ferrer por atrofia de la grasa periorbitaria por cirugía de cavidades anoftálmicas. Se verificó que cumplieran con los criterios de selección de pacientes para cirugía plástica y se citaron para tratamiento quirúrgico con técnica de lipotransferencia asistida con células madre. La lipotransferencia asistida con células madre derivadas del tejido adiposo constituye un complemento terapéutico seguro y necesario para obtener mejores resultados estéticos en la reconstrucción de la órbita. El éxito final está en lograr una buena apariencia de los párpados, con la capacidad para retener una prótesis ocular que permita el crecimiento adecuado del hueso facial y mejorar el aspecto estético(AU)

Periorbital defects, regardless of their etiology, are usually related to ophthalmologic medical services; however, sometimes they require the intervention of the plastic surgeon. The loss of an eyeball has functional, aesthetic and psychological repercussions in those who suffer it. It can expose deeper underlying tissue asymmetries that improve with lipografting by restoring the soft tissue contours around the eye. The purpose of presenting this case series is to show the utility of autologous adipose tissue stem cell-assisted lipograft as an adjunct to orbital reconstruction. Three cases are presented that came to the Plastic Surgery Service of the Hospital Clínico Quirúrgico Hermanos Ameijeiras referred from the Ocular Plastic Surgery Service of the Instituto Cubano de Oftalmología Ramón Pando Ferrer for atrophy of the periorbital fat due to surgery of anophthalmic cavities. It was verified that they met the criteria for selection of patients for plastic surgery and they were scheduled for surgical treatment with stem cell-assisted lipotransfer technique. Stem cell assisted lipotransfer is a safe and necessary therapeutic complement to obtain better aesthetic results in the reconstruction of the orbit. The ultimate success lies in achieving a good appearance of the eyelids, with the ability to retain an ocular prosthesis that allows adequate growth of the facial bone and improve the aesthetic appearance(AU)

Comparación Placas de Titanio vs. Placas Reabsorbibles en Fracturas de Orbita: Revisión de literatura / Comparison of Titanium Plates vs. Resorbable Plates in Orbital Fractures: Literature Review

RESUMEN Introducción: Los tratamientos para fracturas de órbita se basan en la corrección del defecto de las lesiones orbitarias de tipo blow in y blow out (o de estallido), mediante diversas placas y mallas biocompatibles con el organismo, dándose una cicatrización de primera generación evitando un callo óseo y una fijación más rígida. Para el diagnóstico de este tipo de lesiones tenemos inflamación periorbitaria, enoftalmos, diplopía, equimosis, hemorragia subconjuntival. Existen diversos materiales reconstructivos siendo estos compuestos por distintas materias primas, como son los aloplásticos y autógenos; donde encontramos varios tipos como placas de titanio y las placas reabsorbibles siendo estas las más comunes y usadas actualmente, por su bajo estímulo a reabsorciones óseas y evitando efectos secundarios a largo plazo. Estas placas presentan diversos grados de ductilidad y resistencia. Se informó sobre varias complicaciones según el tipo de placas como es la cicatrización, las cirugías postquirúrgicas en caso de placas de titanio, etc. El objetivo de esta revisión es la evaluación de la eficacia las placas reabsorbibles versus placas de titanio en fracturas de órbita. Materiales y métodos: La investigación es de carácter documental, descriptivo y no experimental. En el cual se emplea una metodología de identificación e inclusión de artículos científicos tipo prisma. Resultados y conclusiones: Se verificaron las ventajas y desventajas tanto de las placas reabsorbibles como las de titanio siendo estas similares en la biocompatibilidad con el organismo humano, así como también varias diferencias como el soporte, fuerzas, resistencia de estas, concluyendo que es debatible el material ideal para tratar fracturas de órbita. Se seleccionaron artículos tomando en cuenta el título y objetivos; considerando estudios comparativos, revisiones sistemáticas, revisiones de literatura, los cuales comprendían criterios con respecto a fracturas de órbita y tratamientos quirúrgicos. La búsqueda arrojó 55 artículos en PubMed, 65 en Google, 4 en Scielo y 29 en Science direct, de los cuales se excluyeron libros, monografías, estudios experimentales, dando como resultado 21 artículos para el desarrollo de esta revisión bibliográfica. Y que fueron leídos y analizados en su totalidad, estudiando los objetivos, metodología y conclusión de cada uno de ellos para la posterior comparación.

ABSTRACT Introduction: Treatments for orbit fractures are based on the correction of the defect of blow in and blow out orbital injuries, by means of various plates and meshes biocompatible with the organism, giving a first-generation healing avoiding a bony callus and a more rigid fixation. For the diagnosis of this type of lesions we have periorbital inflammation, enophthalmos, diplopia, ecchymosis, subconjunctival hemorrhage. There are several reconstructive materials being these composed of different raw materials, such as alloplastic and autogenous, where we find several types such as titanium plates and resorbable plates being these the most common and currently used, for its low stimulus to bone resorption and avoiding long-term side effects. These plates have different degrees of ductility and resistance. Several complications have been reported depending on the type of plates, such as scarring, post-surgical surgeries in the case of titanium plates, etc. The objective of this review is to evaluate the efficacy of resorbable versus titanium plates in orbital fractures. Materials and methods: This research are a documentary, descriptive and non-experimental nature. A prism-type methodology of identification and inclusion of scientific articles was used. Results and conclusions: The advantages and disadvantages of both resorbable and titanium plates were verified, being these similar in biocompatibility with the human organism, as well as several differences such as support, forces, resistance of the same, concluding that it is debatable. The ideal material to treat orbital fractures. Articles were selected considering the title and objectives; considering comparative studies, systematic reviews, literature reviews, which included criteria regarding orbital fractures and surgical treatments. The search yielded 55 articles in PubMed, 65 in Google, 4 in Scielo and 29 in Science direct, from which books, monographs, experimental studies were excluded, resulting in 21 articles for the development of this bibliographic review. The 21 articles were read and analyzed in their entirety, studying the objectives, methodology and conclusion of each one of them for subsequent comparison.

Correção secundária de Fratura Blow-Out: relato de caso / Secondary correction of Blow-Out Fracture: case report / Corrección secundaria de Fractura Blow-Out: reporte de caso

Objetivo: Discutir o tratamento cirúrgico secundário de uma fratura de órbita tipo Blow-Out, explorando os desafios e limitações relacionados a este padrão de fratura. Relato de Caso: Paciente sexo masculino, 50 anos, ASA I relatando histórico de agressão física e quatro cirurgias prévias em região orbitária direita. Clinicamente foram observados sinais como enoftalmo, hipoftalmo, encurtamento da pálpebra inferior, dificuldade de oclusão palpebral, entrópio, hiperemia em conjuntiva, além de presença de secreção purulenta, todos em região orbitária à direita. Diante do exposto, uma nova intervenção cirúrgica foi proposta pela Cirurgia e Traumatologia Bucomaxilofacial, na tentativa corrigir alguns problemas listados, além de encaminhamento a outras especialidades. Encontra-se em acompanhamento de um ano, com boa evolução. Conclusão: O tratamento de fraturas orbitárias é um dos mais desafiadores, especialmente quando se trata sequelas. A definição pelo melhor momento para realização destes procedimentos não é um consenso, sendo necessário uma avaliação clínica criteriosa. Apesar da utilização dos enxertos autógenos ser amplamente recomendada, os materiais aloplásticos vem se tornando a primeira escolha para tratamento das correções secundárias pelas diversas vantagens oferecidas.

Aim: To discuss the secondary surgical treatment of a Blow-Out orbit fracture, exploring the challenges and limitations related to this fracture pattern. Case report: Male patient, 50 years old, ASA I reporting a history of physical aggression and four previous surgeries in the right orbital region. Clinically, enophthalmos, hypophthalmos, shortening of the lower eyelid, difficulty in eyelid occlusion, entropion, hyperemia in the conjunctiva were observed, in addition to the presence of purulent secretion, all in the right orbit. In view of the above, a new surgical intervention was proposed by Buccomaxillofacial Surgery and Traumatology, in an attempt to correct some listed problems, in addition to referral to other specialties. He is being followed up for one year, with good progress. Conclusion: The treatment of orbital fractures is one of the most challenging, especially when dealing with sequelae. The definition of the best time to perform these procedures is not a consensus, requiring a careful clinical evaluation. Although the use of autogenous grafts is widely recommended, alloplastic materials are becoming the first choice for treating secondary corrections due to the several advantages offered.

Objetivo: Discutir el tratamiento quirúrgico secundario de una fractura orbitaria Blow-Out, explorando los desafíos y las limitaciones relacionadas con este patrón de fractura. Caso Clínico: Paciente masculino, 50 años, ASA I, que refi ere antecedentes de agresión física y cuatro cirugías previas en región orbitaria derecha. Clínicamente se observaron signos como enoftalmos, hipoftalmos, acortamiento del párpado inferior, difi cultad en la oclusión palpebral, entropión, hiperemia en la conjuntiva, además de la presencia de secreción purulenta, todos en la región orbitaria derecha. Ante lo anterior, se propuso una nueva intervención quirúrgica desde Cirugía Oral y Maxilofacial y Traumatología, en un intento de corregir algunos de los problemas enumerados, además de la derivación a otras especialidades. Está en seguimiento desde hace un año, con buena evolución. Conclusión: El tratamiento de las fracturas de órbita es uno de los más desafi antes, especialmente cuando se trata de secuelas. La defi nición del mejor momento para realizar estos procedimientos no es un consenso, lo que requiere una evaluación clínica cuidadosa. A pesar de que se recomienda ampliamente el uso de injertos autógenos, los materiales aloplásticos se han convertido en la primera opción para el tratamiento de correcciones secundarias debido a las múltiples ventajas que ofrecen.

Effect of retrobulbar prostaglandin analog injection on orbital fat in rats.

PURPOSE: Periorbital fat atrophy is a known side effect of topical prostaglandin analogs (PA). This side effect may have implications in the treatment of diseases like thyroid orbitopathy. In this in vivo study we aimed to evaluate the effects of retrobulbar injection of three different PAs on orbital fat. METHODS: Eighteen adult male Wistar-albino rats were divided into three groups of six animals. 0.1 ml of 0.03% bimatoprost, 0.005% latanoprost, or 0.005% travoprost was injected into the right orbits and saline was injected into the left orbits, as controls. Both orbits were exenterated after 3 weeks. Histological cross-sections were analyzed using ImageJ image analysis software. Intraconal adipocyte density was calculated. RESULTS: There was no significant difference in the adipocyte density between the PA injected orbits and the control side in each of the three groups. When calculations from all three groups were analyzed together, again the difference in the adipocyte density between the PA injected orbits and the control side was not significant. CONCLUSION: No significant fat atrophy was noted in this rat model three weeks after retrobulbar injection of PAs. To evaluate retrobulbar injection of PA as a potential therapy for orbital diseases with fat proliferation, in vivo studies in different animal models, higher concentrations of PA, or longer follow-up duration are required.

A semi-analytical model to estimate Chlorophyll-a spatial-temporal patterns from Orbita Hyperspectral image in inland eutrophic waters.

It can be challenging to accurately estimate the Chlorophyll-a (Chl-a) concentration in inland eutrophic lakes due to lakes' extremely complex optical properties. The Orbita Hyperspectral (OHS) satellite, with its high spatial resolution (10 m), high spectral resolution (2.5 nm), and high temporal resolution (2.5 d), has great potential for estimating the Chl-a concentration in inland eutrophic waters. However, the estimation capability and radiometric performance of OHS have received limited examination. In this study, we developed a new quasi-analytical algorithm (QAA716) for estimating Chl-a using OHS images. Based on the optical properties in Dianchi Lake, the ability of OHS to remotely estimate Chl-a was evaluated by comparing the signal-to-noise ratio (SNR) and the noise equivalent of Chl-a (NEChl-a). The main findings are as follows: (1) QAA716 achieved significantly better results than those of the other three QAA models, and the Chl-a estimation model, using QAA716, produced robust results with a mean absolute percentage difference (MAPD) of 11.54 %, which was better than existing Chl-a estimation models; (2) The FLAASH (Fast Line-of-sight Atmospheric Analysis of Spectral Hypercubes) atmospheric correction model (MAPD = 22.22 %) was more suitable for OHS image compared to the other three atmospheric correction models we tested; (3) OHS had relatively moderate SNR and NEChl-a, improving its ability to accurately detect Chl-a concentration and resulting in an average SNR of 59.47 and average NEChl-a of 72.86 µg/L; (4) The increased Chl-a concentration in Dianchi Lake was primarily related to the nutrients input, and this had a significant positive correlation with total nitrogen. These findings expand existing knowledge of the capabilities and limitations of OHS in remotely estimating Chl-a, thereby facilitating effective water quality management in eutrophic lake environments.

Proptosis como presentación inicial de un fibroma osificante etmoidal en edad pediátrica / Proptosis as Initial Presentation of an Ethmoid Ossifying Fibroma in Pediatric Age

El fibroma osificante es un tumor óseo benigno poco común, cuya localización más frecuente son los huesos maxilofaciales, pero su origen en el seno etmoidal es raro. La mayor incidencia se describe entre la segunda y la cuarta décadas de la vida. Se efectuó una revisión en la literatura nacional sobre fibromas osificantes etmoidales con extensión orbitaria, y no se encontraron reportes publicados. Se presenta el caso de una paciente de 10 años de edad que fue remitida a consulta de Oculoplastia por notar protrusión ocular izquierda desde hacía tres meses. Se le realizó ultrasonido, tomografía computarizada y resonancia magnética en los que se evidenció una lesión tumoral de seno etmoidal con compromiso de órbita izquierda que ocasionaba proptosis, con características imagenológicas sugestivas de un probable fibroma osificante. La biopsia endoscópica nasal confirmó el diagnóstico(AU)

Ossifying fibroma is an uncommon benign bone tumor, whose most frequent location is the maxillofacial bones, but its origin in the ethmoid sinus is rare. The highest incidence is described between the second and fourth decades of life. A review of the national literature on ethmoid ossifying fibromas with orbital extension was carried out, and no published reports were found. We present the case of a 10-year old female patient who was referred to Oculoplasty consultation for noticing left ocular protrusion for three months. Ultrasound, computed tomography and magnetic resonance imaging showed a tumor lesion of the ethmoidal sinus with involvement of the left orbit causing proptosis, with imaging characteristics suggestive of a probable ossifying fibroma. Nasal endoscopic biopsy confirmed the diagnosis(AU)

Comparison of Anatomical Preformed Titanium Implants and Patient-Specific CAD/CAM Implants in the Primary Reconstruction of Isolated Orbital Fractures-A Retrospective Study.

BACKGROUND/AIM: Reconstruction of the fractured orbit remains a challenge. The aim of this study was to compare anatomical preformed titanium orbital implants with patient-specific CAD/CAM implants for precision and intraoperative applicability. MATERIAL AND METHODS: A total of 75 orbital reconstructions from 2012 to 2022 were retrospectively assessed for their precision of implant position and intra- and postoperative revision rates. For this purpose, the implant position after digital orbital reconstruction was checked for deviations by mirroring the healthy orbit at 5 defined points, and the medical records of the patients were checked for revisions. RESULTS: The evaluation of the 45 anatomical preformed orbital implant cases showed significantly higher deviations and an implant inaccuracy of 66.6% than the 30 CAD/CAM cases with only 10% inaccuracy. In particular, the CAD/CAM implants were significantly more precise in medial and posterior positioning. In addition, the intraoperative revision rates of 26.6% vs. 11% after 3D intraoperative imaging and the postoperative revision rates of 13% vs. 0 for the anatomical preformed implants were significantly higher than for patient-specific implants. CONCLUSION: We conclude that patient-specific CAD/CAM orbital implants are highly suitable for primary orbital reconstruction. These seem to be preferable to anatomical preformed implants in terms of precision and revision rates.