Transorbital intracranial penetrating injury-an anatomical classification.

BACKGROUND: A transorbital intracranial injury with a wooden foreign body can be very difficult to diagnose and manage. The orbit forms an easy path for low-velocity foreign bodies into the intracranial space. The severity of the injury is often masked by unobtrusive superficial wounds. Computed tomography (CT) findings may be misinterpreted as pneumocephalus. CASE DESCRIPTION: We present a young gentleman who had a fall under the influence of alcohol near a bush and, on clinical presentation, had very little signs of a penetrating injury in the skin. There was some numbness in the V1 distribution of the trigeminal nerve. Further investigation and management are described. CONCLUSION: Although magnetic resonance imaging is more sensitive and specific, a CT angiogram with 3-dimensional reconstruction will provide much insight into the mode of intervention required. We present an anatomical classification for such injuries.

Case report: optic disc edema without hydrocephalus in acoustic neuroma.

Traditionally, visual disturbance and optic disc edema are regarded as late manifestations of acoustic neuromas indicating increased intracranial pressure as a result of obstructive hydrocephalus or a sizeable mass lesion. We report the case of a 56-year-old man who presented with visual disturbance and bilateral optic disc edema. Classic features of hydrocephalus were absent. Magnetic resonance imaging showed a large acoustic neuroma. However, there was no ventriculomegaly and at surgery intracranial pressure was normal. We suggest that cerebrospinal fluid protein may have a role in the formation of optic disc edema through a normal pressure communicating type of hydrocephalus. Furthermore, patients with acoustic neuromas and a visual disturbance related to optic disc edema may be inappropriate for treatment with stereotactic radiosurgery and should be offered early surgery to prevent visual deterioration.