Acute posterior fossa syndrome following lumbar drainage for treatment of suboccipital pseudomeningocele

2000 ◽  
Vol 92 (3) ◽  
pp. 469-474 ◽  
Author(s):  
Geoffrey T. Manley ◽  
William Dillon
Keyword(s):  
Magnetic Resonance Imaging ◽  
Cerebrospinal Fluid ◽  
Posterior Fossa ◽  
Mass Effect ◽  
Resonance Imaging ◽  
Posterior Fossa Syndrome ◽  
Radiological Findings ◽  
Content Type ◽  
Lumbar Drainage ◽  
Fine Print

✓ The authors report on a series of patients who underwent lumbar drainage of cerebrospinal fluid (CSF) for treatment of posterior fossa pseudomeningoceles and who subsequently developed an acute posterior fossa syndrome. These patients were found to have similar radiological findings demonstrating acute mass effect secondary to movement of CSF from the pseudomeningocele into the cerebellar parenchyma. Discontinuation of lumbar drainage resulted in symptomatic and radiological improvement in all patients. From these cases the authors infer that not all pseudomeningoceles communicate directly with the subarachnoid space. A readily recognizable appearance on magnetic resonance imaging that is useful in diagnosing this reversible complication of treatment for posterior fossa pseudomeningocele is also illustrated.

Spinal intramedullary spread of medulloblastoma

1986 ◽  
Vol 65 (2) ◽  
pp. 253-255 ◽  
Author(s):  
Stanley L. Barnwell ◽  
Michael S. B. Edwards
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Computerized Tomography ◽  
Posterior Fossa ◽  
Diagnostic Information ◽  
Resonance Imaging ◽  
Content Type ◽  
Fine Print

✓ The case of an 11-year-old boy is reported in whom two intramedullary lesions developed at the thoracic-cervical and thoracic-lumbar junctions 2½ years after resection and irradiation of a medulloblastoma in the posterior fossa. There was no evidence of subarachnoid spread of the tumor. Magnetic resonance imaging was used to localize these lesions, and provided much better diagnostic information than either computerized tomography scans or myelograms.

Large intramedullary lipoma of the cervical cord and posterior fossa

1986 ◽  
Vol 64 (6) ◽  
pp. 974-976 ◽  
Author(s):  
Koreaki Mori ◽  
Yoshihiko Kamimura ◽  
Yasufumi Uchida ◽  
Masahiro Kurisaka ◽  
Sueo Eguchi
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Posterior Fossa ◽  
Cervical Cord ◽  
Resonance Imaging ◽  
Content Type ◽  
Fine Print

✓ A large intramedullary lipoma of the cervical cord extending into the posterior fossa is reported in a 7-year-old boy. Magnetic resonance imaging was very useful for delineation of the anatomy of the lipoma as an aid in planning the operation.

Posttraumatic intradiploic meningoencephalocele

1996 ◽  
Vol 84 (2) ◽  
pp. 284-287 ◽  
Author(s):  
Arun-Angelo Patil ◽  
Hamid Etemadrezaie
Keyword(s):  
Magnetic Resonance Imaging ◽  
Cerebrospinal Fluid ◽  
Magnetic Resonance ◽  
Brain Tissue ◽  
Blunt Trauma ◽  
Arachnoid Membrane ◽  
Resonance Imaging ◽  
Content Type ◽  
Parietal Area ◽  
Fine Print

✓ A case of posttraumatic intradiploic meningoencephalocele is reported. The patient presented with a progressively enlarging lump in the left parietal area approximately 8 months after a blunt trauma. Magnetic resonance imaging showed an intradiploic cyst containing cerebrospinal fluid and brain tissue. These findings were confirmed at surgery. In addition, the cyst was found to have a lining of arachnoid membrane.

Subependymomas of the fourth ventricle

1985 ◽  
Vol 62 (4) ◽  
pp. 508-512 ◽  
Author(s):  
Rashid Jooma ◽  
Michael J. Torrens ◽  
John Bradshaw ◽  
Betty Brownell
Keyword(s):  
Magnetic Resonance Imaging ◽  
Fourth Ventricle ◽  
Benign Tumor ◽  
Respiratory Control ◽  
Resonance Imaging ◽  
Radiological Findings ◽  
Surgical Morbidity ◽  
Content Type ◽  
Scant Attention ◽  
Fine Print

✓ Subependymomas of the fourth ventricle are generally considered incidental postmortem findings, and have received scant attention from neurosurgeons. The authors present a surgical series of 12 cases of this disorder diagnosed over a 13-year period. The clinical and radiological findings were reviewed and correlations made with pathological studies. The subependymoma is a histologically benign tumor that tends to be calcified. It has a predilection for the fourth ventricle and a peak incidence in the fifth decade of life. It is usually of considerable size with extensive attachment at the time of its detection, and is associated with significant surgical morbidity. The authors believe that magnetic resonance imaging may be the best method of investigation. Intraoperative disturbance of circulatory or respiratory control should suggest to the surgeon that the operation be abandoned. A laser or ultrasonic aspirator may be very helpful in removing these tumors. Postoperative care must include monitoring for apnea.

Cervical epidural actinomycosis

2001 ◽  
Vol 95 (1) ◽  
pp. 132-134
Author(s):  
Behzad Eftekhar ◽  
Ebrahim Ketabchi ◽  
Mohammad Ghodsi ◽  
Ali Ahmadi
Keyword(s):  
Magnetic Resonance Imaging ◽  
Cord Compression ◽  
Clinical Entity ◽  
Rare Clinical Entity ◽  
Upper Limbs ◽  
Review Of The Literature ◽  
Resonance Imaging ◽  
Radiological Findings ◽  
Content Type ◽  
Fine Print

✓ Cervical actinomycosis causing spinal cord compression is a rare clinical entity. In a review of the literature, the authors found only 13 cases with actinomycosis-related spinal neurological deficit. The authors describe the case of a 26-year-old man who presented with neck pain and partial paresis of the upper limbs. Magnetic resonance imaging revealed a long cervical epidural enhancing lesion that extended from C-1 to T-2. The radiological findings resembled metastasis and other epidural infections. The patient was treated medically with penicillin and amoxicillin for 7 months and recovered neurologically. The authors conclude that although cervical epidural actinomycosis is a rare clinical entity resembling metastasis and other infections in this region, it should be considered so that this unique infection can be diagnosed in the least invasive fashion and, whenever possible, unnecessary surgery can be avoided.

Hydrocephalus secondary to diffuse villous hyperplasia of the choroid plexus

1996 ◽  
Vol 85 (4) ◽  
pp. 689-691 ◽  
Author(s):  
Gavin W. Britz ◽  
D. Kyle Kim ◽  
John D. Loeser
Keyword(s):  
Magnetic Resonance Imaging ◽  
Cerebrospinal Fluid ◽  
Choroid Plexus ◽  
Resonance Imaging ◽  
Ventriculoatrial Shunt ◽  
Content Type ◽  
Tomography Scanning ◽  
Csf Production ◽  
Choroid Plexus Papillomas ◽  
Fine Print

✓ Diffuse villous hyperplasia of the choroid plexus, which is distinct from bilateral choroid plexus papillomas, is extremely rare and is often associated with hydrocephalus due to the overproduction of cerebrospinal fluid (CSF). The authors describe an infant with hydrocephalus, diagnosed by computerized tomography scanning, who developed ascites following placement of a ventriculoperitoneal shunt and, subsequently, demonstrated excessive CSF production when the shunt was externalized. The patient was later successfully treated by placement of a ventriculoatrial shunt. Magnetic resonance imaging demonstrated diffuse villous hyperplasia of the choroid plexus as the cause of the patient's hydrocephalus. The literature on diffuse villous hyperplasia of the choroid plexus is reviewed.

Brainstem tethering in Dandy—Walker syndrome: a complication of cystoperitoneal shunting

1995 ◽  
Vol 83 (6) ◽  
pp. 1072-1074 ◽  
Author(s):  
John C. Liu ◽  
Joseph D. Ciacci ◽  
Timothy M. George
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Posterior Fossa ◽  
Cranial Nerve ◽  
Resonance Imaging ◽  
Content Type ◽  
Cystoperitoneal Shunt ◽  
Cystoperitoneal Shunting ◽  
Cyst Fenestration ◽  
Fine Print

✓ Treatment of the Dandy—Walker syndrome has included placement of a ventriculoperitoneal shunt alone or in combination with a posterior fossa cystoperitoneal shunt. Complications in shunting are common and are usually related to malfunction or infection. The authors present a case in which the patient developed headaches and focal cranial nerve deficits following infection caused by a cystoperitoneal shunt. Magnetic resonance imaging showed tethering of the brainstem. A posterior fossa craniotomy with microsurgical untethering and cyst fenestration achieved two goals: improvement of the focal cranial nerve deficits and elimination of the cystoperitoneal shunt.

Rapid expansion of a previously asymptomatic subependymoma

2005 ◽  
Vol 103 (6) ◽  
pp. 1084-1087 ◽  
Author(s):  
Adrian W. Laxton ◽  
Patrick Shannon ◽  
Sukriti Nag ◽  
Richard I. Farb ◽  
Mark Bernstein
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Posterior Fossa ◽  
Fourth Ventricle ◽  
Rapid Expansion ◽  
Histopathological Analysis ◽  
Resonance Imaging ◽  
Content Type ◽  
History Of ◽  
Fine Print

✓ This 39-year-old man presented with a 6-month history of occipital headaches. Magnetic resonance imaging revealed an irregularly shaped fourth ventricle mass. One month after his initial presentation, he was admitted to the hospital with significant tumor expansion and clinical deterioration. A posterior fossa craniectomy was performed and the mass was resected. Histopathological analysis of this tumor showed central necrosis with associated edema in an otherwise typical and benign-appearing subependymoma. To the authors' knowledge, this is the first reported case of rapid, nonhemorrhagic expansion associated with necrosis in a previously asymptomatic subependymoma.

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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