(a.) Pertaining to a thin membrane of the brain and spinal cord, between the dura mater and pia mater.
(a.) Covered with, or composed of, soft, loose hairs or fibers, so as to resemble a cobweb; cobwebby.
(n.) The arachnoid membrane.
(n.) One of the Arachnoidea.
Example Sentences:
(1) Diagnostic work-up and management of intracranial arachnoid cysts are still controversial.
(2) Seventy-eight patients presented optochiasmal arachnoiditis: 12 had trigeminal neuralgia; 1, arachnoiditis of the cerebellopontile angle; 6, arachnoiditis of the convex surface of the brain; and 3, the hypertensive hydrocephalic syndrome due to occlusion of the CSF routes.
(3) Within the arachnoid mater the immunoreactivity was concentrated in the basal zone of the arachnoid membrane, thus appearing as a narrow fluorescent band near the border of the dura.
(4) True arachnoid cysts of the suprasellar region are uncommon and have rarely been diagnosed pre-operatively.
(5) Four mechanisms for the formation of ectopic meningioma have been suggested: (a) direct extension of an intracranial lesion; (b) distant metastasis from an intracranial meningioma; (c) origin from arachnoid cells within the sheaths of cranial nerves; and (d) origin from embryonic nests of arachnoid cells.
(6) A series is reported of 9 cases of supratentorial arachnoid cysts in children under the age of 14 years.
(7) The second patient had optic nerve involvement as well as two intracranial parenchymal lesions and granulomatous arachnoiditis.
(8) The association of an arachnoidal cyst in the middle cranial fossa with a subdural haematoma or intracystic bleeding is emphasised.
(9) In addition, it proposes a modification of the standard dural closure that may reduce the incidence of contributory adhesive arachnoiditis by the creation of a capacious cerebrospinal fluid space about the neural plaque.
(10) Subarachnoid alumina may be a good model for human arachnoiditis.
(11) The delayed appearance of syringomyelia after a severe single spinal trauma resulting in contusion of the spinal cord without the complication of arachnoiditis is a more recent issue, but is now well-known.
(12) Many thousands of arachnoid villi subtend all the membranes from the intrathecal space, and many of these end in the large epidural veins.
(13) SSFP MR images helped markedly in diagnosis of hemorrhagic, epidermoid, and arachnoid cysts.
(14) The main causes are Potts Disease, arachnoiditis, tropical spastic paraplegia, trauma, lathyrism and cord compression.
(15) The author evaluates the dynamics of immune reactivity of the body in patients with cerebral arachnoiditis with consideration of main clinical syndrome--hypertensive-hydrocephalic, epileptiform, autonomic-vascular dystonia syndromes in different variants of the course of the process.
(16) This observation relates a case of spinal arachnoiditis with paraplegia, for a 56 year old patient hospitalized for a S.A.H.
(17) These findings suggest alternative drainage pathways for CSF besides the arachnoid villi (Pacchionian bodies) including connections with lymphatics in the neck and along the olfactory nerve, and around the cribiform plate to the nasal submucosa, and with proptosis, perhaps also through the aqueous humor-canal of Schlemm and nasolacrimal duct.
(18) Gross morphological features of cystic larvae, complex arachnoid cysts, granulomatous abscesses, basal meningitis and mineralised nodules correlated closely with the images obtained, especially on MR, where resolution permitted visualisation of larval protoscolices.
(19) CT scan demonstrated an arachnoid cyst in the left Sylvian fissure.
(20) The authors report long-term results in 17 patients with surgically treated congenital intradural spinal arachnoid cysts.
Meninges
Definition:
(n. pl.) The three membranes that envelop the brain and spinal cord; the pia mater, dura mater, and arachnoid membrane.
Example Sentences:
(1) A review of campylobacter meningitis by Lee et al in 1985 reported nine cases occurring in neonates, of which only one case was caused by C. fetus.
(2) Such complications as intracerebral haematoma or meningeal haemorrhage may occur during the usually benign course of the disease.
(3) Two patients presented in addition to intestinal manifestations massive extraintestinal symptoms, both with septicemia and meningitis.
(4) The diagnosis of meningeal cyst was confirmed in a non-invasive way by MRI showing a mass with the same signal intensities as CSF on both T1 and T2 weighted images.
(5) Cefuzoname seems to be among the middle ranks of beta-lactam agents as far as penetration rate is concerned; however, when its potent antibacterial activity and broad spectrum are taken into account, the concentrations in CSF in patients with meningitis seem worth examining.
(6) There were no signs of meningeal leukemia, no pathological changes were caused by the intrathecal MTX treatment.
(7) The results demonstrated tumor cells infiltrating the surface meninges and a severe astrocytic reaction associated with oedema in the periventricular and brain stem subpial white matter.
(8) Unexpectedly long retention times were noted for the chlorinated solvents, particularly for chloroforn, which showed a specific long-term retention in the cerebellum, meninges and spinal nerves, indicating interactions with specific nervous tissue receptors.
(9) 96 patients with meningitis due to Neisseria meningitidis and Diplococcus pneumoniae were treated with epicillin or ampicillin according to a predesigned randomization chart.
(10) The clinical characteristics and response to therapy of a patient with meningeal sarcoma, one of four patients over a twenty-five year period at Memorial Sloan-Kettering Cancer Center, are described.
(11) Oligoclonal IgG proteins were detected in the cerebrospinal fluid (CSF) during the 2nd week after onset of meningitis or later in 4 out of 10 patients, and could be detected as late as 11 and 12 months after meningitis in 2 patients.
(12) Although intensive care medicine and chemotherapy of bacterial infections have made great progress during the last 30 years, therapeutic efficacy in bacterial meningitis in adult patients could not be improved.
(13) The heads were examined for adult and larval meningeal worms (Parelaphostrongylus tenuis) by physical examination of the brain surfaces, and the Baermann technique, respectively, and for ear mites by examination of ear scrapings.
(14) Staphylococcus epidermidis is a recognized cause of nosocomial meningitis in low-birth-weight infants and frequently occurs without CSF abnormalities.
(15) Although intracranial tuberculoma is uncommon in children, it must be included in the differential diagnosis of all tuberculous meningitis.
(16) The concentrations that were obtained in the CSF were not high enough to justify the exclusive use of fosfomycin in the treatment of meningitis.
(17) Meningitis and meningoencephalitis are common manifestations of infection; solid granulomas occur but are unusual, and intraventricular granulomas are distinctly rare.
(18) Their cases were not compatible with missed meningitis.
(19) Its complications are exceptional (rhinorrhoea, meningitis, orbital trauma), but require a detailed preoperative examination in order to reveal variations in sinus anatomy.
(20) This review examines their use in respiratory tract infections, bacterial meningitis, skin-structure infections, and urinary tract infections in adult patients.