Extensive Cerebral Venous Sinus Thrombosis Due to Medroxyprogesterone Acetate.

This retrospective patient report describes a unique case of cerebral venous sinus thrombosis arising from hormonal contraceptive use, and the management of said thrombosis and its secondary ophthalmic manifestations. The patient initially presented with significant visual decline, headaches, florid disc oedema, and vessel tortuosity, due to extensive sinus thromboses that were causing increased intracranial pressure. It was determined that the root cause of the thrombosis was the use of injectable medroxyprogesterone acetate, leading to a hypercoagulable state. Optic nerve sheath fenestration was performed for this patient as an early intervention. The patient, though ultimately experiencing some vision loss, was able to recover and retain limited unilateral central vision, despite a protracted hospital course. We hope to propose that optic nerve sheath fenestration, in conjunction with anti-coagulation therapy, may be a consideration for patients with similar presentations on an individualised basis, in order to prevent vision loss from cerebral venous sinus thrombosis. Though studies are limited, we believe early intervention may be what allowed our patient to retain some central vision, and suggest more studies be done into the utility of this procedure for patients with this clinical vignette.