A Modified Bicanalicular Crawford Placement Method for Congenital Nasolacrimal Duct Obstruction: Reducing Need for Operative Room Removal.

PURPOSE: This study introduces a method for Crawford bicanalicular stent placement for congenital nasolacrimal duct obstruction by looping the ends to themselves which are tied together with dissolvable sutures to ease in-office removal. METHODS: This is a single institution, retrospective study that evaluates outcomes of patients aged 5 years and under who underwent bicanalicular stenting for congenital nasolacrimal duct obstruction by a single surgeon (G.S.E.) between 2004 and 2020. Only primary surgeries were included in the analysis. Stenting could be accompanied by balloon dilatation and/or turbinate infracture. Age, sex, follow-up time, complications, type of intervention, extrusion, recurrence, and operative room removal were recorded. RESULTS: This study included 56 eyes from 54 patients with a mean age of 19.0 ± 9.5 months (range, 8-50 months). There was a 30.3% extrusion rate, a 5.4% rate of recurrence of disease, and a 3.6% rate of operative room removal. The average follow-up time was 25.1 ± 39.8 months (range, 1-132 months). For patients with or without extrusion, there were no significant differences between age, sex, laterality, type of intervention, follow-up time, or rate of recurrence. Each eye that had recurrence (3 total) or needed operative room removal (2 total) underwent only bicanalicular stenting without accompanying procedures, although the difference in rates between procedures was also not statistically significant. CONCLUSIONS: This method had a low recurrence and operative room removal rate, with similar extrusion and complication rates to other bicanalicular stent and intubation methods for the treatment of congenital nasolacrimal duct obstruction.

Genome-wide association study and meta-analysis in multiple populations identifies new loci for peanut allergy and establishes C11orf30/EMSY as a genetic risk factor for food allergy.

BACKGROUND: Peanut allergy (PA) is a complex disease with both environmental and genetic risk factors. Previously, PA loci were identified in filaggrin (FLG) and HLA in candidate gene studies, and loci in HLA were identified in a genome-wide association study and meta-analysis. OBJECTIVE: We sought to investigate genetic susceptibility to PA. METHODS: Eight hundred fifty cases and 926 hyper-control subjects and more than 7.8 million genotyped and imputed single nucleotide polymorphisms (SNPs) were analyzed in a genome-wide association study to identify susceptibility variants for PA in the Canadian population. A meta-analysis of 2 phenotypes (PA and food allergy) was conducted by using 7 studies from the Canadian, American (n = 2), Australian, German, and Dutch (n = 2) populations. RESULTS: An SNP near integrin α6 (ITGA6) reached genome-wide significance with PA (P = 1.80 × 10-8), whereas SNPs associated with Src kinase-associated phosphoprotein 1 (SKAP1), matrix metallopeptidase 12 (MMP12)/MMP13, catenin α3 (CTNNA3), rho GTPase-activating protein 24 (ARHGAP24), angiopoietin 4 (ANGPT4), chromosome 11 open reading frame (C11orf30/EMSY), and exocyst complex component 4 (EXOC4) reached a threshold suggestive of association (P ≤ 1.49 × 10-6). In the meta-analysis of PA, loci in or near ITGA6, ANGPT4, MMP12/MMP13, C11orf30, and EXOC4 were significant (P ≤ 1.49 × 10-6). When a phenotype of any food allergy was used for meta-analysis, the C11orf30 locus reached genome-wide significance (P = 7.50 × 10-11), whereas SNPs associated with ITGA6, ANGPT4, MMP12/MMP13, and EXOC4 and additional C11orf30 SNPs were suggestive (P ≤ 1.49 × 10-6). Functional annotation indicated that SKAP1 regulates expression of CBX1, which colocalizes with the EMSY protein coded by C11orf30. CONCLUSION: This study identifies multiple novel loci as risk factors for PA and food allergy and establishes C11orf30 as a risk locus for both PA and food allergy. Multiple genes (C11orf30/EMSY, SKAP1, and CTNNA3) identified by this study are involved in epigenetic regulation of gene expression.

Classification accuracy of serum Apo A-I and S100B for the diagnosis of mild traumatic brain injury and prediction of abnormal initial head computed tomography scan.

The objective of the current study was to determine the classification accuracy of serum S100B and apolipoprotein (apoA-I) for mild traumatic brain injury (mTBI) and abnormal initial head computed tomography (CT) scan, and to identify ethnic, racial, age, and sex variation in classification accuracy. We performed a prospective, multi-centered study of 787 patients with mTBI who presented to the emergency department within 6 h of injury and 467 controls who presented to the outpatient laboratory for routine blood work. Serum was analyzed for S100B and apoA-I. The outcomes were disease status (mTBI or control) and initial head CT scan. At cutoff values defined by 90% of controls, the specificity for mTBI using S100B (0.899 [95% confidence interval (CI): 0.78-0.92]) was similar to that using apoA-I (0.902 [0.87-0.93]), and the sensitivity using S100B (0.252 [0.22-0.28]) was similar to that using apoA-I (0.249 [0.22-0.28]). The area under the receiver operating characteristic curve (AUC) for the combination of S100B and apoA-I (0.738, 95% CI: 0.71, 0.77), however, was significantly higher than the AUC for S100B alone (0.709, 95% CI: 0.68, 0.74, p=0.001) and higher than the AUC for apoA-I alone (0.645, 95% CI: 0.61, 0.68, p<0.0001). The AUC for prediction of abnormal initial head CT scan using S100B was 0.694 (95%CI: 0.62, 0.77) and not significant for apoA-I. At a S100B cutoff of <0.060 µg/L, the sensitivity for abnormal head CT was 98%, and 22.9% of CT scans could have been avoided. There was significant age and race-related variation in the accuracy of S100B for the diagnosis of mTBI. The combined use of serum S100B and apoA-I maximizes classification accuracy for mTBI, but only S100B is needed to classify abnormal head CT scan. Because of significant subgroup variation in classification accuracy, age and race need to be considered when using S100B to classify subjects for mTBI.

Medial rectus surgery for convergence excess esotropia with an accommodative component: a comparison of augmented recession, slanted recession, and recession with posterior fixation.

UNLABELLED: Richard G. Scobee was an internationally renowned strabismologist whose life was short yet very productive. The first section of this paper describes his life and contributions to strabismology and orthoptics. The second section of this paper reports the results of our strabismological study. INTRODUCTION AND PURPOSE: Many different surgical procedures exist for the treatment of children or adults with convergence excess esotropia. We report on our results of augmented recession, slanted recession, and recession with posterior fixation of the medial rectus muscle in such situations. We also report on the incidence of induced vertical deviations. METHODS: Using a retrospective chart review of 800 patients, we excluded patients with confounding strabismus conditions and pharmacological treatments leaving 131 patients included in the study. Slanted reinsertion of medial rectus (twenty-seven patients); posterior fixation with recession of medial rectus (twenty-two patients); augmented medial rectus recession (fifty-eight patients); nonaugmented recession of medial rectus (seventy-three patients). The distance near disparity postoperatively was evaluated using a life table analysis in which all patients were grouped according to the length of time postoperatively. Induced vertical deviation was evaluated at least 6 months postoperatively. RESULTS: At all time periods postoperatively, the patients with slanted recessions showed the greatest reduction in distance near disparity and that reduction was the most stable over time. At 12- 14 months postoperatively, the range in reduction measured 7.9- 11(Δ) among all three procedures. At 15- 18 months postoperatively, the range in reduction measured 16.9- 19.3(Δ) diopters among the three procedures. At greater than 6 months postoperatively, the slanted and augmented recession groups showed up to 1(Δ) of right hypertropia and the posterior fixation and nonaugmented groups showed up to 0.6(Δ) of left hypertropia. CONCLUSIONS: All three medial rectus procedures used in our retrospective study (slanted recession, augmented recession, recession with posterior fixation) reduced the distance near disparity. The greatest and most stable reduction at all time periods postoperatively occurred with the slanted recession. The induced vertical deviation is small in all procedures and is acceptable at 1(Δ) or less. The augmented and slanted recessions are easier to perform than the posterior fixation with recession. We recommend that the slanted reinsertion of the medial rectus recession be considered as a viable option in the surgical correction of esotropia with a distance near disparity.

Postoperative results of absorbable, subconjunctival adjustable sutures.

BACKGROUND: Adjustable sutures have improved our ability to treat patients with strabismus. Inherent with its use, however, is the postoperative chore of dealing with the exposed sutures necessitating intervention in all patients. We describe a new surgical technique that utilizes a fornix incision in which absorbable sutures are placed in the subconjunctival space. METHODS: We conducted a retrospective review of patients in which this technique was utilized. Thirty patients were identified. RESULTS: Twenty-one patients required postoperative manipulation; ten were aligned in the postoperative recovery area in the period prior to discharge and eight in an office setting between days 1 and 4 postoperatively. Three patients were adjusted at both times. The patients adjusted in the immediate postoperative period experienced slightly less discomfort. Twenty-seven of the 30 patients (90%) had successful surgical outcome. Postoperative complications included more tissue response than is normally seen: four patients had a suture granuloma and two patients had a subconjunctival infection postoperatively. CONCLUSION: The use of absorbable subconjunctival sutures in strabismus surgery reduces the need for postoperative manipulation in some patients and allows for delayed adjustment in other patients.

Sarcoidosis juvenil: tratamiento con metotrexato

Objetivos: Evaluar la efectividad del metotrexate (MTX) como agente ahorrador de corticoesteroides en niños con sarcoidosis por medio de un estudio abierto no controlado. Métodos: Se administro MTX a 7 niños con sarcoidosis comprada histológicamente (4M,3H). La edad media al diagnóstico de la enfermedad fue 11 años (7-16) y el promedio de seguimiento de los pacientes fue 20.6 meses (6-38). La duración promedio de la enfermedad fue 21 meses (8-38m) y el MTX se administró en promedio durante 13 meses (6-28m); se utilizó la vía oral en dosis semanal de 10-15mg/m2. Según la respuesta individual, la dosis de corticoesteroides se redujo gradualmente. Con el fin de ser incluidos en el estudio todos los pacientes habían recibido MTX por un mínimo de 6 meses. Se consideró que la respuesta fue benéfica, al apreciarse mejoría clínica o la estabilización de los síntomas sin progresión de la enfermedad al disminuir gradualmente la dosis de corticoesteroides. La medición de respuesta clínica se determinó con base: (1) un índice de severidad para determinar la respuesta global; (2) exitosa disminución en la dosis de corticoesteroides; y (3) mejoría de los parámetros de laboratorio. Resultados: Se encontró mejora significativa en el índice de severidad clínica y en los parámetros paraclínicos. La dosis promedio de prednisona fue exitosamente disminuida de 49 mg/día a 18 mg/dí después de tres meses de haber iniciado el MTX y a 7.3 mg/día al final del estudio. Otros parámetros clínicos y de laboratorio (Hgb, VSG y niveles de ECA) mejoraron significativamente después del comienzo del medicamento. No se observaron efectos adversos con el uso del medicamento. Conclusión: Nuestro estudio sugiere que el uso de dosis bajas de MTX en la sarcoidosis juvenil, es efectivo, seguro y que también tiene propiedades ahorradoras de corticoesteroides