RT Journal Article SR Electronic T1 Open-Angle Glaucoma and Paraoptic Cyst: First Description of a Series of 11 Patients JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology DO 10.3174/ajnr.A4194 A1 A. Bertrand A1 C. Vignal A1 F. Lafitte A1 P. Koskas A1 O. Bergès A1 F. Héran YR 2015 UL http://www.ajnr.org/content/early/2015/01/02/ajnr.A4194.abstract AB SUMMARY: We report 11 patients who were referred to our institution for severe open-angle glaucoma who had a paraoptic cyst on MR imaging. All cysts were extraoptic and retrolaminar; most were deforming the adjacent optic nerve. Cysts had a high signal on T2 and FLAIR sequences, and a variable signal on T1 and variable echogenicity, suggesting different proteinaceous content. Arterial vascularization of the optic nerve was normal. Cyst volumes were inversely correlated with the severity of glaucoma on the same eye (P < .01–.05, Spearman correlation coefficient). We hypothesized that such cysts may reflect a valve mechanism, which would allow preservation of the translamina cribrosa pressure and thus could preserve visual function. The rarity of this association, together with the frequent mass effect of the cyst on the optic nerve, stresses the necessity of long-term follow-up in these patients. Abbreviations MDmean deviationOCToptical coherence tomographyPSDpattern standard deviationUSultrasound