Until recently, angiography has been of little help in the diagnosis of mass lesions of the posterior fossa. Advances in neuroradiology have now made posterior fossa angiography the procedure of choice in many cases. The anatomy and radiography of the veins of the posterior fossa have been detailed by Huang and Wolf (1965, 1966). Reports of angiographic (especially venographic) features of post...

Intracranial teratomas represent a rare lesion accounting for 0.1%-0.7% of all intracranial tumors. Those in the fourth ventricle have rarely been reported. The present case is that of a 28-year-old man with occipital headache for two months. MRI examination revealed a well-defined extra-axial cystic lesion in posterior fossa in the midline herniating through the foramen magnum. Pre operatively...

One case of traumatic posterior fossa subdural hematoma (PFSH) is described. This location represent 1% of the subdural hematomas. Computerized Tomography (CT) was used in the diagnosis and follow-up of the hematoma. The etiology and physiopathology of this process are discussed.

Posterior fossa emissary veins are valveless veins that pass through cranial apertures. They participate in extracranial venous drainage of the posterior fossa dural sinuses. The mastoid emissary vein, condylar veins, occipital emissary vein, and petrosquamosal sinus are the major posterior fossa emissary veins. We believe that posterior fossa emissary veins can be detected by radiologists befo...

Aseptic meningitis is a recognised complication after posterior fossa surgery. It is often self limiting but occasionally runs a protracted course requiring repeated CSF examination to exclude infection, and treatment with systemic steroids. A patient is described with aseptic meningitis after posterior fossa surgery who underwent posterior fossa re-exploration nearly 3 years after the initial ...

Oligodendrogliomas comprise approximately 4% of the total of brain tumours, and of this group only 7% are found in the posterior fossa, including 2% in the fourth ventricle. Oligodendrogliomas of the fourth ventricle therefore comprise less than one case in 1,000 to 1,500 brain tumours (0 08 %). One cannot expect to encounter much more than one in a lifetime even in a large-neurosurgical experi...

Vestibular schwannomas are the most common cerebellopontine angle tumors. These tumors commonly present with ipsilateral dysfunction of acoustic, vestibular, trigeminal, and facial nerves.1 Presentation of the vestibular schwannoma with contralateral facial nerve dysfunction is quite uncommon, and the contralateral facial paresis has been mentioned as a false localizing sign for posterior fossa...

BACKGROUND Keyhole craniotomies are increasingly being used for lesions of the skull base. Here we review our recent experience with these approaches for resection of intracranial meningiomas. METHODS Clinical and operative data were gathered on all patients treated with keyhole approaches by the senior author from January 2012 to June 2013. Thirty-one meningiomas were resected in 27 patients...

AIM Neurothekeomas are benign tumors of presumed neural sheath origin. They are primarily found in superficial soft tissues, located in the upper portion of the body. Here, we report a case of intracranial neurothekeoma. RESULTS A 37-year-old female presented at our clinic with sudden-onset left hemifacial pain of varying duration. The physical and neurological examination fin...