Histopathology of the arachnoid granulations and brain in HIV-associated cryptococcal meningitis: correlation with cerebrospinal fluid pressure.
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Surgical treatment of spinal lipoma without spina bifida at lumbar region-three case reports-.
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Three men aged 40 to 60 years presented with rare lumbar spinal intradural lipomas without spina bifida manifesting as worsening numbness, pain of the lower extremities, and bladder dysfunction. All 3 patients underwent decompressive laminectomy. The lipoma and cauda equina nerves were dissected from the dura mater under the operating microscope, untethering the spinal cord and returning the cauda equina nerves to the original position. Duralplasty was performed using an expanded polytetrafluoroethylene sheet. Postoperatively, all patients experienced improvement of their neurological deficits. In the surgical treatment of spinal lipomas, the primary purpose is untethering and decompression, which can be achieved by untethering the spinal cord, returning the cauda equina nerves to the normal position, laminectomy, and duralplasty, without removal of the lipoma. (+info)
Maternally expressed gene 3, an imprinted noncoding RNA gene, is associated with meningioma pathogenesis and progression.
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Cerebrospinal fluid dynamics in the human cranial subarachnoid space: an overlooked mediator of cerebral disease. II. In vitro arachnoid outflow model.
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Supratentorial high convexity intradural extramedullary cavernous angioma: case report.
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A 59-year-old man presented with a 2-month history of numbness in the lower left side of the face and upper left extremity. Axial T(1)-weighted magnetic resonance imaging showed a wedge-shaped mass measuring 3 x 2.5 cm in the right frontoparietal high convexity area that was heterogeneously enhanced after administration of gadolinium-diethylenetriaminepenta-acetic acid. Right frontoparietal craniotomy was performed and a bluish soft mass was found under the arachnoid membrane. The mass could be dissected free from the arachnoid membrane and the brain surface. Histological examination revealed the typical findings of cavernous angioma. Cavernous angioma should be considered in the differential diagnosis of supratentorial high convexity intradural extramedullary tumor, especially appearing as a heterogeneously enhanced mass adjacent to the brain parenchyma causing mass effect. (+info)
Cerebrospinal fluid absorption disorder of arachnoid villi in a canine model of hydrocephalus.
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Allergic reaction following arachnoid plasty with a fibrin sealant.
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A 65-year-old woman underwent surgical treatment of an unruptured aneurysm in the left middle cerebral artery. Surgical craniotomy using arachnoid plasty with a fibrin sealant was completed without incident, but abrupt neurological deterioration occurred on the 9th postoperative day. Antibiotic treatment was given, but the symptoms did not resolve. Neuroimaging and physical findings indicated allergic reaction rather than infectious process. Therefore, systemic steroids were administered that resulted in dramatic resolution of symptoms. Nine months later, lymphocyte stimulation test of materials used in arachnoid plasty revealed positive response to a component of the combination pair in fibrin glue. The fibrin sealant placement method is a widely accepted and familiar technique, but surgeons should anticipate possible allergic reactions such as those observed in the present case. (+info)