Collet-Sicard syndrome is characterized by the unilateral paralysis of cranial nerves IX–XII. The most common cause is an extradural tumor in the posterior fossa. This syndrome may occasionally occur because of distant metastases. Collet-Sicard syndrome which results from metastatic prostate carcinoma is very rare. A review of the English literature showed that this is the second report of meta...

Haemangioblastoma (HBs) may occur sporadically in the central nervous system, or in association with von Hippel-Lindau (VHL) disease. Haemangioblastoma of the central nervous system is often seen in the posterior cranial fossa. VHL is an autosomaly dominant disorder. In sporadic HBs tumours, VHL alleles are reported to be inactive in up to 50% of tumours. Five patients with tumours of the poste...

Background: Pattern of origin of anterior inferior artery is important in interpretation of posterior circulatory stroke and during posterior cranial fossa surgery for aneurysms, arteriovenous malformations, tumors, posterior cerebral revascularization, and in diagnostic as well as interventional neuroradiology. The pattern displays ethnic variation but data from African populations are scanty....

A 7-month-old Caucasian girl presented with an acquired, spasmodic torticollis to the right side with the head tilted downwards, photophobia and epiphora. Diagnostic work-out revealed a posterior fossa pilocytic astrocytoma. The symptoms improved after surgical resection. There is evidence of internuclear connections between cranial nerves II, V and VII acting as important mechanisms in this tr...

essential for the congenital type of cholesteatoma particularly in the petrous pyramid. Magnetic resonance has largely replaced CT for the soft tissue demonstration of masses in the petrous temporal bone and posterior cranial fossa particularly when assisted by Gadolinium enhancement. GdMRI is now the definitive investigation for acoustic neuromas although adequate preliminary screening is nece...

A patient with an uncommonly situated congenital intradural arachnoid cyst is reported. The cyst extended from the cervical spinal canal into the posterior cranial fossa and was posterolateral to the spinal cord. The patient's initial complaint was urinary hesitancy. The location of the cyst is unique and the presenting complaint rare.

A 27-year-old woman presented with a history of loss of balance and deafness in the left ear for 2 weeks. Computed tomography and arteriography demonstrated a giant aneurysm 49 mm in diameter in the posterior cranial fossa. Surgical removal of the aneurysm was unsuccessful.

During routine osteology demonstration of the posterior cranial fossa we noticed a transverse bony canal in the middle third of the clivus of an adult male skull. The canal was situated 1.8 cm in front the anterior border of the foramen magnum. The length of the canal was 0.6 cm long. The possible embryological basis and clinical significance of the variation was discussed.

During regular dissection classes, we came across tripled falx cerebelli in a male cadaver. The main (middle) falx cerebelli was large and was attached to the internal occipital crest. It contained the occipital sinus. There were two smaller folds (right and left), one on either side of the falx cerebelli. There were two aberrant venous sinuses; each one connecting the ipsilateral sigmoid and t...

Introduction: Posterior Fossa arachnoid cysts (PFAC) are rare lesions in the childhood. Owing to wide variety of cystic malformations within posterior cranial fossa, PFAC have long attracted attention pediatric neurosurgeons because they can produce not only neurological symptons but also behaviro and learning deficts, addition presenting major surgical challenges. Surgical treatment is warrant...