Normal high-resolution computed tomographic (CT) scans of 126 patients were reviewed to define the diameter, height of the bifurcation, and transverse position of the normal basilar artery. The mean diameter of the normal basilar artery is 3.17 mm at the level of the pons. In 92% of normal subjects, the basilar bifurcation is located in the interpeduncular cistern adjacent to the dorsum sellae ...

Objective NA. Background We report a case of neuroblastoma, pediatric neuroendocrine tumor the sympathetic nervous system, in 3-year-old female with multiple cranial nerve involvement. Design/Methods A afebrile, lethargic presented bilateral eyelid droop, right head tilt, slurred speech, gagging, abnormal walking and no bowel movement. Neurological examination noted ptosis, dysarthria, left ton...

Chondroid chordoma is a variant of chordoma; it may rarely involve the petrous temporal bone and has a high propensity for recurrence. Chordoma rarely metastasizes but it is, nevertheless, associated with a poor outcome. We report a rare case of chondroid chordoma with extensive recurrence and pulmonary metastases.

Introduction The anatomy of the posterior circulation is very complex and variable. The basilar artery which forms the spine of posterior cerebral circulation usually terminates by dividing into two posterior cerebral arteries [1]. Basilar termination is the most frequent site of aneurysm [2]. The variations may also alter the relationships with and compress oculomotor nerve [3]. There are, how...

Basilar impression is a skeletal malformation characterized by translocation of the upper cervical spine and clivus into the foramen magnum, giving rise to various symptoms related to brainstem, upper spinal cord, and cerebellar compression. It is generally classified as primary (familial), in which the defect is unaccompanied by intrinsic abnormalities of bone, or as secondary, reflecting an i...

130 CMYK Brain Surgery: complication avoidance and management. New York: Churchill Livingston; 1993. pp. 2221-44. 2. Kanaan IU, Ellis M, Safi T, Al Kawi MZ, Coates R. Craniocervical junction tuberculosis: a rare but dangerous disease. Surg Neurol 1999;51:21-5. 3. Selvapandian S, Chandy MJ. Tuberculous granuloma of the clivus. Br J Neurosurg 1993;7:581-2. 4. Sencer S, Sencer A, Aydin K, Hepgul K...

Clival chordoma is a rare primary bone tumour that arises from the remnant of the notochord and typically occurs in older adults. Upon imaging, the tumour can be seen arising from the clivus and causes clival destruction. This usually provides insight for a diagnosis. Here we present a case of a non-enhancing, pre-pontine mass that was hypointense on T1W and hyperintense on T2W in an adolescent...

Internuclear ophthalmoplegia is a remarkable finding, particularly in patients victims of head injury. The medial longitudinal fasciculus, which is believed to be lesioned in cases of internuclear ophthalmoplegia, has an unique brain stem position and the mechanism involved in brain stem contusions implies a maximal intensity of shearing forces on the skull base. We describe a very rare associa...

INTRODUCTION Chordoma is a rare malignant tumour with an incidence of metastasis of less than 10 percent. Usually arising from clivus its posterior extension may involve the brainstem before presenting as nasal mass and obstruction. Surgery is the main mode of treatment with adjuvant radiotherapy. However surgery is rarely possible for a large intracranial lesion. CASE PRESENTATION We report ...