Aneurysmal cyst of the frontal bone: case report and review of the literature.

A case of an aneurysmal bone cyst of the skull is presented. To date, six cases involving the frontal bone have been reported in the literature. We review the clinicopathological features, investigative procedures and management options of this rare calvarial tumour.

Brown-Sequard syndrome and an intradural arteriovenous fistula in a child.

A case of spinal dural arteriovenous fistula presenting in a 7-year-old child as a Brown-Sequard syndrome is reported. Spinal arteriovenous fistulae are reviewed with emphasis on classification, pathophysiology, investigations and management.

Current status of myelography in the evaluation of the thoracic spinal cord.

The myelographic features in 35 patients with clinical thoracic spinal cord disease and normal plain radiographs were reviewed to re-evaluate the role of pre-operative myelography since the advent of computed tomography and magnetic resonance. The most frequent lesions were meningioma (9 cases), prolapsed intervertebral disc (9 cases), and metastases (8 cases). The extent and anatomical location of the lesion was demonstrated in all 19 patients without myelographic block. In 16 cases with complete block, the anatomical location was demonstrated in 14, and the extent of the lesion in four, using cervical puncture in two and CT myelography in one. Myelography remains a valuable method of assessment of the thoracic spinal cord and canal and is sufficient to allow the preoperative planning of surgical management in the absence of complete block. Additional investigation by computed tomography or magnetic resonance imaging is advised in the presence of complete block or an intramedullary lesion.