Transscleral filtration revealing a chorioretinal coloboma

Benjamin Scemla; Quentin Duroi; Pierre Duraffour; Vaël Souedan; Antoine P Brézin

doi:10.1016/j.ajoc.2020.101003

Transscleral filtration revealing a chorioretinal coloboma

Am J Ophthalmol Case Rep. 2020 Dec 19:21:101003. doi: 10.1016/j.ajoc.2020.101003. eCollection 2021 Mar.

Authors

Benjamin Scemla¹, Quentin Duroi¹, Pierre Duraffour¹, Vaël Souedan¹, Antoine P Brézin¹

Affiliation

¹ Université de Paris, Centre d'Ophtalmologie de l'Assistance Publique - Hôpitaux de Paris, Hôpital Cochin, 27 rue du faubourg Saint-Jacques, 75014, Paris, France.

Abstract

Purpose: We report the case of a 19-year-old patient who presented with an ocular hypotony due to a transscleral filtration through an isolated congenital chorioretinal coloboma in his right eye.

Observations: The initial examination showed a decimal best corrected visual acuity (BCVA) decreased to 0.7 and a marked hypotony. A localized infero-nasal chemosis and a conjunctival hyperemia were observed. The fundus examination showed chorioretinal folds and an edematous disc. In the infero-nasal retinal periphery, a chorioretinal coloboma was seen with a full-thickness scleral defect. Ultrasound biomicroscopy showed the area of the coloboma through which the percolation of fluid occurred.

Conclusions and importance: A favorable outcome was observed within 6 weeks and BCVA improved to 1.0 three months later. The intraocular pressure (IOP) increased to 11 mmHg, but the bleb-like filtration could still be seen together with some persistent chorioretinal folds. Ultrasound Biomicroscopy (UBM) imaging was helpful to understand the mechanism of this uncommon complication of a coloboma.

Keywords: Chorioretinal coloboma; Ocular hypotony; Transscleral filtration.

Publication types

Case Reports