Orbital magnetic resonance imaging is useful in age-related distance esotropia / Utilidad de la resonancia magnética orbitaria en la esotropía asociada a la edad

Purpose: To describe findings for orbital magnetic resonance imaging (MRI) in patients with age-related distance esotropia (ARDE). Methods: We compared 31 orbital MRI from patients with ARDE (77 ± 7 SD years) with 2 control groups: 32 orbits from individuals aged 18-50 years (33 ± 8 SD years) and 16 orbits from individuals aged >60 years (77 ± 7 SD years). MRI scans were acquired using 3D fast field echo in T1 sequence without fat saturation. Exclusion criteria for all groups were neurological or thyroid disease and a relevant ophthalmological history (e.g., high myopia, diplopia from another etiology, complicated cataract surgery, etc.). Muscle displacement and characteristics of the lateral rectus-superior rectus (LR-SR) intermuscular band were analyzed. Results: The analysis of the muscles and angles revealed a series of statistically significant differences (p < 0.07) between the groups. Subjects with ARDE had LR pulley positions 1.32 ± 0.19 mm lower than in younger controls, and the medial rectus (MR) pulley positions were 0.68 ± 0.19 mm lower than in younger. Older controls had LR and MR pulley positions 0.85 ± 0.20 mm and 0.49 ± 0.23 mm lower than in younger. ARDE subjects had LR pulley positions 0.46 ± 0.26 mm lower than in older control group. The LR-SR band was absent in 35.5% of ARDE patients and in 12.5% of older control group (p = 0.168). Conclusions: MRI showed that displacements of LR and LR-SR band degeneration could facilitate the diagnosis of patients with ARDE

Objetivo: Describir los hallazgos encontrados en la resonancia magnética orbitaria (RMN) en pacientes con esotropía asociada a la edad (ETAE). Métodos: Comparamos 31 RMN orbitarias de pacientes con ETAE (77 ± 7 DE años) con 2 grupos control: 32 órbitas de individuos con edades comprendidas entre 18 y 50 años (33 ± 8 DE años) y 16 órbitas de individuos con edades >60 años (77 ± 7 DE años). Las RMN se adquirieron utilizando eco de campo rápido 3D en secuencia T1 sin saturación de grasa. Los criterios de exclusión para todos los grupos fueron enfermedad neurológica o tiroidea y antecedentes oftalmológicos relevantes (ej.: alta miopía, diplopía de otra etiología, cirugía complicada de cataratas...). Se analizaron el desplazamiento muscular y las características de la banda intermuscular recto lateral-recto superior (RL-RS). Resultados: El análisis de los músculos y ángulos reveló una serie de diferencias estadísticamente significativas (p < 0,07) entre los grupos. Los sujetos con ETAE presentaban la polea del RL 1,32 ± 0,19 mm inferior a los controles jóvenes y la polea del recto medial (RM) 0,68 ± 0,19 mm inferior a los sujetos jóvenes. Los controles de mayor edad tenían las poleas del RL y del RM posicionadas 0,85 ± 0,2 mm y 0,49 ± 0,23 mm inferiores a los jóvenes. Los sujetos con ETAE tenían la polea del RL 0,46 ± 0,26 mm inferior a la del grupo control de mayor edad. La banda RL-RS estaba ausente en el 35,5% de los pacientes con ETAE y en el 12,5% del grupo control de mayor edad (p = 0,168). Conclusiones: La RMN reflejó que los desplazamientos del RL y la degeneración de la banda RL-RS podrían facilitar el diagnóstico de los pacientes con ETAE

Orbital magnetic resonance imaging is useful in age-related distance esotropia.

PURPOSE: To describe findings for orbital magnetic resonance imaging (MRI) in patients with age-related distance esotropia (ARDE). METHODS: We compared 31 orbital MRI from patients with ARDE (77±7 SD years) with 2 control groups: 32 orbits from individuals aged 18-50 years (33±8 SD years) and 16 orbits from individuals aged >60 years (77±7 SD years). MRI scans were acquired using 3D fast field echo in T1 sequence without fat saturation. Exclusion criteria for all groups were neurological or thyroid disease and a relevant ophthalmological history (e.g., high myopia, diplopia from another etiology, complicated cataract surgery, etc.). Muscle displacement and characteristics of the lateral rectus-superior rectus (LR-SR) intermuscular band were analyzed. RESULTS: The analysis of the muscles and angles revealed a series of statistically significant differences (p<0.07) between the groups. Subjects with ARDE had LR pulley positions 1.32±0.19mm lower than in younger controls, and the medial rectus (MR) pulley positions were 0.68±0.19mm lower than in younger. Older controls had LR and MR pulley positions 0.85±0.20mm and 0.49±0.23mm lower than in younger. ARDE subjects had LR pulley positions 0.46±0.26mm lower than in older control group. The LR-SR band was absent in 35.5% of ARDE patients and in 12.5% of older control group (p=0.168). CONCLUSIONS: MRI showed that displacements of LR and LR-SR band degeneration could facilitate the diagnosis of patients with ARDE.