Third ventricle tumor with Bruns sign as the first manifestation: a case report.

This article reported a case of a third ventricle tumor with Bruns syndrome sudden disturbance of consciousness as the first manifestation, to improve the clinician's understanding and awareness of the fatal signs. A 38-year-old healthy man was admitted to our hospital for a sudden onset coma for 2 hours. Head magnetic resonance imaging (MRI) showed midbrain aqueduct occlusion, intraductal abnormal nodule signal, considering space-occupying lesions. On the fourth day of admission, the patient was scheduled to undergo ventriculoscopic resection of the mass, but the patient had a small ventricular foramen, which was difficult to explore the posterior part of the third ventricle, and the possibility of injuring the vein was high. Finally, the third ventriculostomy was performed by ventriculoscope. 6 months later, the tumor grew slowly and the patient had no hydrocephalus.