Characterization of cyclic CSF flow in the foramen magnum and upper cervical spinal canal with MR flow imaging and computational fluid dynamics. (41/83)

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Endoscopic management of large multicompartmental intraventricular arachnoid cyst extending from foramen magnum to foramen of Monro. (42/83)

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Syringomyelia associated with Chiari I malformation treated with foramen magnum decompression and duraplasty using a polyglycolic acid patch and fibrin glue: a case report. (43/83)

A 31-year-old woman presented with worsening numbness and pain in the arms and chest. Neurological findings at admission were decreased pain sensation and temperature sensation in the arms and chest. Magnetic resonance demonstrated a large cervical syrinx from the level of C4 to Th4 associated with Chiari I malformation. Occipital craniectomy and C1 laminectomy were performed for foramen magnum decompression. Intraoperative ultrasonography, performed after removal of the outer membrane of the dura mater at the level of the foramen magnum, revealed insufficient decompression. Therefore, the dura mater was completely opened and duraplasty was performed with a polyglycolic acid patch and fibrin glue. Sufficient decompression was thus achieved. The neurological symptoms and signs improved within the first postoperative month, and magnetic resonance showed a decrease in the size of the syrinx and no cerebrospinal fluid leakage. In patients undergoing foramen magnum decompression with duraplasty, the use of a polyglycolic acid patch and fibrin glue renders suturing unnecessary and avoids the common complications associated with suture duraplasty.  (+info)

Peak CSF velocities in patients with symptomatic and asymptomatic Chiari I malformation. (44/83)

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Pathophysiology of persistent syringomyelia after decompressive craniocervical surgery. Clinical article. (45/83)

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Usefulness of phase contrast cine mode magnetic resonance imaging for surgical decision making in patients with hydrocephalus combined with achondroplasia. Case report. (46/83)

A 1-year 9-month-old girl presented with achondroplasia. Serial magnetic resonance (MR) imaging demonstrated mild compression of the medulla oblongata by the occipital bone, macrocrania, and progressive hydrocephalus. Cerebrospinal fluid (CSF) flow study using MR imaging clearly demonstrated CSF flow disturbance at the cervicospinal junction. Foramen magnum decompression was performed for her hydrocephalus and compressed medulla. Postoperative CSF flow study demonstrated improvement of CSF flow at the craniocervical junction. The patient has remained in a stable condition for 7 months postoperatively. Achondroplasia represents hydrocephalus or medullary compression caused by narrowed foramen magnum, which can result in sudden death in some infants. Surgical indications and methods for hydrocephalus combined with achondroplasia remain controversial because the natural history of the hydrocephalus has remained unclear. CSF flow study using MR imaging can provide useful information regarding the surgical indication and methods for the treatment of hydrocephalus combined with achondroplasia.  (+info)

Foramen magnum ontogeny in Homo sapiens: a functional matrix perspective. (47/83)

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A three-dimensional comparison of a morphometric and conventional cephalometric midsagittal planes for craniofacial asymmetry. (48/83)

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