Superior sagittal sinus obstruction and tuberculous abscess.

Intracranial tumours such as meningiomas may occasionally produce raised intracranial pressure by occluding a venous sinus. More uncommonly, midline tumours in the occipital regions of the skull can produce elevated intracranial pressure by non-thrombotic compression of the superior sagittal sinus. We present a case of raised intracranial pressure secondary to non-thrombotic obstruction of the superior sagittal sinus by a midline tuberculous abscess.