Oclusión arterial asociada con un asa vascular prepapilar. Cambios anatómicos en el seguimiento a largo plazo / Arterial occlusion associated with a prepapillary vascular loop. Anatomical changes on the long term follow up

Paciente de 13 años de edad que presenta un escotoma del campo visual superior de 48 horas de evolución. Mejor agudeza visual corregida de 20/20 en ambos ojos. La exploración del fondo de ojo derecho reveló un asa vascular prepapilar torsionada asociada a un área de blanqueamiento retiniano y atenuación vascular tanto en el sector nasal como temporal, la cual no afectaba fóvea. Durante el seguimiento el asa vascular desaparece y es reemplazada por tejido glial sobre el disco óptico. La mejor agudeza visual corregida permaneció en 20/20. Este caso muestra el comportamiento del asa vascular posterior a la oclusión de la misma. La ausencia de flujo sanguíneo produce un colapso de las paredes arteriales, que con el tiempo llevan a la formación de tejido glial

We report the case of a 13-year-old patient who complains of an acute superior visual field scotoma in the last 48hours. Best corrected visual acuity (BCVA) was 20/20 in both eyes. The right eye fundus examination revealed torsion of a prepapillary loop in the inferior branch of the retinal artery, associated with a arterial vascular attenuation and whitenning of the inferior retina that involved both nasal and temporal branches but spared the foveal region. During the follow-up the vascular loop dissapeared and only glial tissue was seen in front of the optic nerve head. BCVA remained 20/20 in both eyes. This report shows the evolution of the vascular loop after an occlusion. The absence of blood flow produces a collapse of the arterial walls, in time the vascular loop is replaced by glial tissue

Arterial occlusion associated with a prepapillary vascular loop. Anatomical changes on the long term follow up. / Oclusión arterial asociada con un asa vascular prepapilar. Cambios anatómicos en el seguimiento a largo plazo.

We report the case of a 13-year-old patient who complains of an acute superior visual field scotoma in the last 48hours. Best corrected visual acuity (BCVA) was 20/20 in both eyes. The right eye fundus examination revealed torsion of a prepapillary loop in the inferior branch of the retinal artery, associated with a arterial vascular attenuation and whitenning of the inferior retina that involved both nasal and temporal branches but spared the foveal region. During the follow-up the vascular loop dissapeared and only glial tissue was seen in front of the optic nerve head. BCVA remained 20/20 in both eyes. This report shows the evolution of the vascular loop after an occlusion. The absence of blood flow produces a collapse of the arterial walls, in time the vascular loop is replaced by glial tissue.