[A case of Terson's syndrome with an interesting MRI finding].

We report a case of a 62-year-old woman admitted to our hospital in a semicomatose state. CT scan and MRI on admission revealed a dense subarachnoid hemorrhage and intracerebral hematoma in the right frontal lobe. Digital subtraction angiography showed a saccular aneurysm located in the anterior communicating artery, so radical neck clipping of the aneurysm was performed via the right pterional approach. The operation was unevential. The patient complained of bilateral visual disturbance on the next day and FLAIR image of MRI demonstrated clearly crescent shaped and mobile high intense lesions corresponding to subhyaloid vitreous hemorrhage in both eye balls. The fundoscopic examination revealed an intravitreous hemorrhage which gradually disappeared over the next 12 days. Terson's syndrome after subarachnoid hemorrhage has been linked to an entity of poor prognosis, so it is beneficial that characteristic findings in FLAIR image of MRI can lead to correct diagnosis of Terson's syndrome earlier.