We report a young girl who presented with headache and back pain. Dynamic MRI revealed no cerebrospinal egress from the median aperture (Foramen of Magendie) of the fourth ventricle and syringomyelia. A posterior cranial fossa exploration was performed and agenesis of the median aperture was observed. Following surgical penetration of the posterior aspect of the fourth ventricle and at the most...

In spite of the development of a superior (middle cranial fossa) and posterior (translabyrinthine) approach to the temporal bone, tumours situated in the infralabyrinthine and apical compartments of the pyramid and surrounding base of the skull were still a challenge for neurosurgeons and otologists as well. The infratemporal fossa approach closes the existing gap in the surgical management of ...

Aneurysmal bone cyst (ABC) is a benign osteolytic bony lesion that can be locally destructive. It is usually observed in the first and second decades of life. This expansile bone lesion commonly involves the metaphysis of long tubular bones, posterior elements of the vertebrae, and flat bones. The skull base is an uncommon location for this tumor with a reported incidence of 3 to 6%. In the lit...

The authors describe a previously unreported malformation involving paired, bilaterally symmetrical dermal sinus tracts in the retro-auricular area, both of which passed through the asterion and posterior fossa dura mater to end intracranially. Cranial dermal sinus tracts are congenital lesions that virtually always originate from the midline scalp posteriorly at the external occipital protuber...

The fossa navicularis (FN) is an anatomical variant on the ventral surface of the basilar part of the occipital bone that, to date, has only been investigated in bone specimens. We aim to clarify the structure of the fossa navicularis by gross anatomical, radiological, and histological methods. The FN was found in the occipital bone of the Caucasian male cadaver. There was no bony or histologic...

Purpose: The aim of this study is to evaluate the morphological changes in Magnetic Resonance Images (MRI) Chiari Malformation Type-1 (CMI) patients by performing morphometric measurements fossa cranii posterior (FCP) and cranium.
 Materials Methods: Our retrospective included a control group 32 (16 females, 16 males) 12 (6 males, 6 females) with CMI between ages 21 47 years. Measurements ...

Abstract Neurovascular conflicts are common in the posterior fossa and basal cisterns due to coexistence of important neural vascular structures. conflict arising from compression cranial nerves by pulsatile flow adjacent atherosclerotic arteries is well known associated with conditions like trigeminal neuralgia, hemifacial spasm, glossopharyngeal neuralgia. The medulla be affected dilated tort...

OBJECTIVE To describe the sonographic appearance and temporal changes of the structures of the posterior cranial fossa in fetuses at a crown-rump length (CRL) between 45 and 84 mm in transvaginal acquired three-dimensional volume blocks. METHODS This was a prospective, cross-sectional, observational study including 80 fetuses, whose mothers attended Kepler University Hospital Linz or the Ambu...

Ritscher-Schinzel syndrome was first described 1987, in the case of two sisters of healthy parents who have had posterior fossa malformations, congenital heart defects and craniofacial anomalies (5). It is believed that this is an autosomal recessive hereditary disorder. So far, according to ORD data (Office of Rare Disease of the National Institutes of Health), only about 30 cases are reported...

The lateral limit of endoscopic endonasal surgery has yet to be defined. The aim of this study was to investigate the lateral limit of endoscopic endonasal surgery at the level of the sphenoid sinus. Access from the sphenoid sinus to the middle cranial fossa through the cavernous sinus triangles was evaluated by cadaver dissection. Anatomical analysis demonstrated that the medial temporal dura ...