The resolution of syringohydromyelia without hindbrain herniation after posterior fossa decompression

1998 ◽  
Vol 89 (2) ◽  
pp. 212-216 ◽  
Author(s):  
Bermans J. Iskandar ◽  
Gary L. Hedlund ◽  
Paul A. Grabb ◽  
W. Jerry Oakes
Keyword(s):  
Spinal Dysraphism ◽  
Spinal Cord Tumor ◽  
Rare Condition ◽  
Posterior Fossa Decompression ◽  
Resonance Imaging ◽  
Content Type ◽  
Hindbrain Herniation ◽  
Pathophysiological Condition ◽  
Preoperative Magnetic Resonance ◽  
Fine Print

Object. To provide more information about this rare condition, the authors describe five cases of syringohydromyelia without hindbrain herniation. Preoperative magnetic resonance imaging with and without gadolinium—diethylenetriamine pentaacetic acid revealed no evidence of spinal cord tumor, arachnoiditis, or spinal dysraphism. Methods. Craniocervical decompression was performed in all patients, after which there was resolution of the symptoms in the four symptomatic patients, and all five showed marked reduction in the size of the syrinx. Conclusions. The authors hypothesize the rare occurrence of syringohydromyelia resulting from a Chiari-like pathophysiological condition but lacking a hindbrain hernia. Patients with this condition may benefit from craniocervical decompression.

scholarly journals The resolution of syringohydromyelia without hindbrain herniation after posterior fossa decompression

2000 ◽  
Vol 8 (3) ◽  
pp. 1-5 ◽  
Author(s):  
Bermans J. Iskandar ◽  
Gary L. Hedlund ◽  
Paul A. Grabb ◽  
W. Jerry Oakes
Keyword(s):  
Marked Reduction ◽  
Spinal Dysraphism ◽  
Spinal Cord Tumor ◽  
Rare Condition ◽  
Posterior Fossa Decompression ◽  
Rare Occurrence ◽  
Resonance Imaging ◽  
Hindbrain Herniation ◽  
Pathophysiological Condition ◽  
Preoperative Magnetic Resonance

Object To provide more information about this rare condition, the authors describe five cases of syringohydromyelia without hindbrain herniation. Preoperative magnetic resonance imaging with and without gadolinium-diethylenetriamine pentaacetic acid revealed no evidence of spinal cord tumor, arachnoiditis, or spinal dysraphism. Methods Craniocervical decompression was performed in all patients, after which there was resolution of the symptoms in the four symptomatic patients, and all five showed marked reduction in the size of the syrinx. Conclusions The authors hypothesize the rare occurrence of syringohydromyelia resulting from a Chiari-like pathophysiological condition but lacking a hindbrain hernia. Patients with this condition may benefit from craniocervical decompression.

Preoperative magnetic resonance imaging localization of convexity brain lesions

1995 ◽  
Vol 82 (3) ◽  
pp. 509-510 ◽  
Author(s):  
Ely Ashkenazi ◽  
Shlomo Pomeranz ◽  
Felix Umansky ◽  
John M. Gomori
Keyword(s):  
Magnetic Resonance ◽  
Brain Lesions ◽  
Resonance Imaging ◽  
Cerebral Lesions ◽  
Mr Image ◽  
Content Type ◽  
Preoperative Magnetic Resonance ◽  
The Brain ◽  
Intraoperative Guidance ◽  
Fine Print

✓ The authors present a simple and accurate new technique for preoperative localization of convexity lesions of the brain by means of magnetic resonance (MR) imaging. This method uses measurements from the initial diagnostic MR image and provides precise intraoperative guidance to cortical and subcortical cerebral lesions.

Duplicated abducent nerve and its course: microanatomical study and surgery-related considerations

2001 ◽  
Vol 95 (5) ◽  
pp. 853-858 ◽  
Author(s):  
Giorgio Iaconetta ◽  
Enrico Tessitore ◽  
Madjid Samii
Keyword(s):  
Internal Carotid ◽  
The Other ◽  
Resonance Imaging ◽  
Anatomical Variant ◽  
Content Type ◽  
Rare Finding ◽  
Preoperative Magnetic Resonance ◽  
Abducent Nerve ◽  
Fine Print ◽  
Rule Out

Object. The anatomy of the abducent nerve is well known; its duplication (ranging from 5 to 28.6%), however, has rarely been reported in the literature. The authors performed a microanatomical study in 100 cadaveric specimens (50 heads) to evaluate the prevalence of this phenomenon and to provide a clear anatomical description of the course and relationships of the nerve. The surgery-related implications of this rare anatomical variant will be highlighted. Methods. The 50 human cadaveric heads (100 specimens) were embalmed in a 10% formalin solution for 3 weeks. Fifteen of them were injected with colored neoprene latex. A duplicated abducent nerve was found in eight specimens (8%). In two (25%) of these eight specimens the nerve originated at the pontomedullary sulcus as two independent trunks: in one case the superior trunk was thicker than the inferior and in the other it was thinner. In the other six cases (75%) the nerve originated as a single trunk, splitting in two trunks into the cisternal segment: in two of them the trunks ran below the Gruber ligament, whereas in four specimens one trunk ran below and one above it. In all the specimens, the duplicated nerves fused again into the cavernous sinus, just after the posterior genu of the internal carotid artery. Conclusions. Although the presence of a duplicated abducent nerve is a rare finding, preoperative magnetic resonance imaging should be performed to rule out this possibility, thus tailoring the operation to avoid postoperative deficits.

Extensive arachnoid ossification with associated syringomyelia presenting as thoracic myelopathy

1999 ◽  
Vol 91 (2) ◽  
pp. 223-229 ◽  
Author(s):  
Konstantin V. Slavin ◽  
Randall R. Nixon ◽  
Gary M. Nesbit ◽  
Kim J. Burchiel
Keyword(s):  
Literature Search ◽  
Rare Condition ◽  
Imaging Features ◽  
Arachnoid Membrane ◽  
Resonance Imaging ◽  
Thoracic Myelopathy ◽  
Content Type ◽  
Progressive Myelopathy ◽  
Highly Sensitive ◽  
Fine Print

✓ The authors present the case of progressive thoracic myelopathy caused by the extensive ossification of the arachnoid membrane and associated intramedullary syrinx. Based on their findings and results of the literature search, they describe a pathological basis for this rare condition, discuss its incidence and symptomatology, and suggest a simple classification for various types of the arachnoid ossification. They also discuss the magnetic resonance imaging features of arachnoid ossification and associated spinal cord changes. The particular value of plain computerized tomography, which is highly sensitive in revealing intraspinal calcifications and ossifications, in the diagnostic evaluation of patients with a clinical picture of progressive myelopathy is emphasized.

scholarly journals Resolution of syringomyelia in ten cases of "up-and-down Chiari malformation" after posterior fossa decompression

2010 ◽  
Vol 68 (5) ◽  
pp. 694-699 ◽  
Author(s):  
José Alberto Gonçalves da Silva ◽  
Luiz Ricardo Santiago Melo ◽  
Antônio Fernandes de Araújo ◽  
Adailton Arcanjo dos Santos Jr
Keyword(s):  
Magnetic Resonance Imaging ◽  
Fourth Ventricle ◽  
Posterior Fossa Decompression ◽  
Sitting Position ◽  
Resonance Imaging ◽  
Postoperative Mri ◽  
Hindbrain Herniation ◽  
Preoperative Magnetic Resonance ◽  
Large Opening ◽  
Magnetic Resonance Imaging Mri

The authors describe ten cases of syringomyelia without hindbrain herniation depicted by preoperative magnetic resonance imaging (MRI) in supine position. However, the herniation was observed in all cases during the operation with the patient in sitting position. The postoperative MRI revealed an intense reduction of the syrinx in all patients, as well as it was also observed a clinical amelioration in all cases. The surgical treatment was based on a large craniectomy with the patient in sitting position, tonsillectomy, large opening of the fourth ventricle and duraplasty with creation of a large cisterna magna.

Delayed nonhemorrhagic encephalopathy following mild head trauma

1989 ◽  
Vol 71 (4) ◽  
pp. 608-610 ◽  
Author(s):  
Zvi Ram ◽  
Moshe Hadani ◽  
Roberto Spiegelman ◽  
Rina Tadmor ◽  
Itzchack Shacked
Keyword(s):  
Head Trauma ◽  
Clinical Course ◽  
Rare Condition ◽  
Neurological Deficits ◽  
Ct Scans ◽  
Unknown Etiology ◽  
Resonance Imaging ◽  
Content Type ◽  
The Brain ◽  
Fine Print

✓ Delayed nonhemorrhagic encephalopathy following mild head trauma is a rare condition with an unknown etiology. The few cases reported in the literature are in young adults, all of them in the era before computerized tomography (CT) became available, and all had a devastating clinical course with multifocal ischemia or necrotic lesions found at autopsy. A case is presented of a young man with this syndrome who survived the acute encephalopathic phase with severe residual neurological deficits. Repeat CT scans during and following the acute phase as well as magnetic resonance imaging showed diffuse multifocal lesions compatible with ischemic changes and demyelination in the “watershed” areas of the brain.

Acute distortion of the anatomy of the third ventricular during third ventriculostomy

2002 ◽  
Vol 96 (3) ◽  
pp. 597-599 ◽  
Author(s):  
Jasper van Aalst ◽  
Emile A. M. Beuls ◽  
Ferenc A. van Nie ◽  
Johan S. H. Vles ◽  
Erwin M. J. Cornips
Keyword(s):  
Third Ventricle ◽  
Third Ventriculostomy ◽  
Fogarty Catheter ◽  
Resonance Imaging ◽  
Content Type ◽  
Endoscopic View ◽  
The Third ◽  
Interpeduncular Cistern ◽  
Preoperative Magnetic Resonance ◽  
Fine Print

✓ The authors report on four third ventriculostomy procedures in which upward ballooning of the third ventricular floor occurred immediately after perforation of the floor and withdrawal of a Fogarty catheter. The floor herniated into the third ventricle, hindering the endoscopic view. Preoperative magnetic resonance imaging demonstrated a similar anatomy in all four cases, consisting of hydrocephalus, extreme dilation of the third ventricle, and disappearance of the interpeduncular cistern due to a very thin, membranous floor of the third ventricle, which herniated downward, draping over the basilar artery. The authors suggest that excessive rinsing in combination with this anatomical configuration provoked the phenomenon of upward ballooning of the third ventricular floor, which is described in this report.

Unusual causes of trigeminal neuralgia treated by gamma knife radiosurgery

2002 ◽  
Vol 97 ◽  
pp. 533-535 ◽  
Author(s):  
Jin Woo Chang ◽  
Jae Young Choi ◽  
Young Sul Yoon ◽  
Yong Gou Park ◽  
Sang Sup Chung
Keyword(s):  
Trigeminal Neuralgia ◽  
Gamma Knife ◽  
Fourth Ventricle ◽  
Gamma Knife Radiosurgery ◽  
Brain Magnetic Resonance Imaging ◽  
Resonance Imaging ◽  
Segmental Demyelination ◽  
Content Type ◽  
Clinical Responses ◽  
Fine Print

✓ The purpose of this paper was to present two cases of secondary trigeminal neuralgia (TN) with an unusual origin and lesion location. In two cases TN was caused by lesions along the course of the trigeminal nerve within the pons and adjacent to the fourth ventricle. Both cases presented with typical TN. Brain magnetic resonance imaging revealed linear or wedge-shaped lesions adjacent to the fourth ventricle, extending anterolaterally and lying along the pathway of the intraaxial trigeminal fibers. The involvement of the nucleus of the spinal trigeminal tract and of the principal sensory trigeminal nucleus with segmental demyelination are suggested as possible causes for trigeminal pain in these cases. It is postulated that these lesions are the result of an old viral neuritis. The patients underwent gamma knife radiosurgery and their clinical responses have been encouraging to date.

Optic pathway glioma infiltrating into somatostatinergic pathways in a young boy with gigantism

1994 ◽  
Vol 81 (4) ◽  
pp. 595-600 ◽  
Author(s):  
Thomas J. Manski ◽  
Charles S. Ha worth ◽  
Bertrand J. Duval-Arnould ◽  
Elisabeth J. Rushing
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Optic Pathway Glioma ◽  
Optic Pathway ◽  
Resonance Imaging ◽  
Content Type ◽  
Hyperintense Signal ◽  
Immunocytochemical Studies ◽  
Stereotactic Biopsies ◽  
Fine Print

✓ The authors report gigantism in a 16-month-old boy with an extensive optic pathway glioma infiltrating into somatostatinergic pathways, as revealed by magnetic resonance imaging and immunocytochemical studies. Stereotactic biopsies of areas showing hyperintense signal abnormalities on T2-weighted images in and adjacent to the involved visual pathways provided rarely obtained histological correlation of such areas. The patient received chemotherapy, which resulted in reduction of size and signal intensity of the tumor and stabilization of vision and growth velocity.

Magnetic resonance imaging of spinal arteriovenous malformations

1987 ◽  
Vol 66 (6) ◽  
pp. 830-834 ◽  
Author(s):  
John L. Doppman ◽  
Giovanni Di Chiro ◽  
Andrew J. Dwyer ◽  
Joseph L. Frank ◽  
Edward H. Oldfield
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Arteriovenous Malformations ◽  
High Signal ◽  
Resonance Imaging ◽  
Content Type ◽  
Spinal Arteriovenous Malformations ◽  
Magnetic Resonance Imaging Mri ◽  
Spinal Avm ◽  
Fine Print

✓ Magnetic resonance imaging (MRI) was performed on 12 patients with spinal arteriovenous malformations (AVM's). Six lesions were intramedullary, five were dural, and one was in a posterior extramedullary location. Serpentine filling defects similar to the classic myelographic findings were demonstrated within the high-signal cerebrospinal fluid on T2-weighted coronal scans. The intramedullary nidus was identified by MRI as an area of low-signal intensity within the cord in all six intramedullary AVM's. Neither the dural nor the posterior extramedullary lesions showed intramedullary components. It is concluded that MRI may noninvasively provide the initial diagnosis of a spinal AVM and distinguish intramedullary from dural and extramedullary lesions.

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