(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.
Crust
Definition:
(n.) The hard external coat or covering of anything; the hard exterior surface or outer shell; an incrustation; as, a crust of snow.
(n.) The hard exterior or surface of bread, in distinction from the soft part or crumb; or a piece of bread grown dry or hard.
(n.) The cover or case of a pie, in distinction from the soft contents.
(n.) The dough, or mass of doughy paste, cooked with a potpie; -- also called dumpling.
(n.) The exterior portion of the earth, formerly universally supposed to inclose a molten interior.
(n.) The shell of crabs, lobsters, etc.
(n.) A hard mass, made up of dried secretions blood, or pus, occurring upon the surface of the body.
(n.) An incrustation on the interior of wine bottles, the result of the ripening of the wine; a deposit of tartar, etc. See Beeswing.
(n.) To cover with a crust; to cover or line with an incrustation; to incrust.
(v. i.) To gather or contract into a hard crust; to become incrusted.
Example Sentences:
(1) In certain cases the ulcerous crust is removed with chloramine.
(2) A rapid evolution of epithelialization was found in case of treated animals as distinguished from control sample, where the infected crust was far from being healed.
(3) Future ice loss and bending of the crust due to rising sea levels have the potential ultimately to raise levels of both earthquake and volcanic activity.
(4) A search for an intact blister is always warranted when erosions, oozing, or crusts are noted.
(5) In general, healthy panelists evaluated the cakes as sweeter, crust bitterness as greater, and overall eating quality as higher than the panel members with carbohydrate metabolic disorders.
(6) The tanks fell from 2,000ft on to the salt crust of the open desert and burst open as they struck the ground.
(7) A negative correlation between the number of mites and the presence and extensiveness of crusts was observed.
(8) The presence of subcorneal pustules in a solitary, indolent, crusted plaque, or in erythema annulare-like lesions with a trailing scale, is evidence of atypical psoriasis.
(9) Requirements for intranasal douching with saline have varied; however, we have had no problems with bothersome crusting following b.i.d.
(10) Disadvantages are a longer healing period and temporary crust formation as in conchotomy, the high technical effort and cost of the laser.
(11) Crusting was found around the lashes, and the lids developed loss of lashes and hair.
(12) Within three weeks after treatment was initiated, all animals were free of crusts.
(13) After the crust falls, carrying away some tattoo pigment on its deeper surface, a pale-pink scar forms, then gradually fades in several months.
(14) We report a case of nonvesicular hydroa vacciniforme in which only extensive crusting associated with hypertrophic scarring on sun-exposed skin was present.
(15) The absorption of mercury was investigated after three phase crusting by Grob on a second-degree scald burn of 10 to 15% of the body surface in rats.
(16) For oxalate stones a separation of the outer layer (crust) from the inner layer (core) marked the point of maximum load.
(17) The vesicles progress to pustules, then to crusts that eventually are lost.
(18) A case of localized CrS appearing as a yellowish and crusted plaque on the second right toe is reported in a woman with AIDS.
(19) All the patients were elderly women who developed chronic, extensive, pustular, crusted and occasionally eroded lesions of the scalp which produced scarring alopecia.
(20) For all their apparent beauty and fragility, just think of coral reefs as big lumps of rock with a living crust.