Die Aplasie der perisylvischen Region

Markakis, E.; Heyer, R.; Stoeppler, L; Werry, H

doi:10.1055/s-0028-1090311

Cited by 4 publications

(3 citation statements)

References 6 publications

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“…This latter mechanism has been suggested by Robinson, 5~ and still has its proponents. 32,39 This paper presents our observations in a scanning electron microscopy (SEM) and transmission electron microscopy (TEM) study of the cyst lining in four cases, and reviews our findings in four other cases we have reported previously. ~9'2~ Enzyme ultracytochemistry was performed in one case for the demonstration of (Na + + K+)-ATPase and alkaline phosphatase.…”

mentioning

confidence: 80%

Arachnoid cysts of the Sylvian fissure

Kito¹,

Houthoff²,

Blaauw³

et al. 1984

Journal of Neurosurgery

200

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Morphological and enzyme ultracytochemical evidence is presented to support the contention that the walls of arachnoid cysts secrete fluid. Clinical evidence has already suggested this phenomenon, including intracranial pressure elevation and expansion in some cases, and the observation that arachnoid cysts constitute closed compartments with a fluid content that cannot be derived from other cerebrospinal fluid-containing spaces. Ultrastructurally, the cyst lining showed a similarity to subdural neurothelium and the neurothelial lining of arachnoid granulations in such morphological features as intercellular clefts with sinusoid dilatations, desmosomal intercellular junctions (upon which tonofilaments may be abutting), pinocytotic vesicles, multivesicular bodies, lysosomal structures, and the presence of a basal lamina. Some of these features, together with the presence of microvilli on the luminal surface, are consistent with fluid secretion. Moreover, enzyme cytochemistry demonstrated (Na+ + K+)-ATPase in the plasma membranes lining the cavity, either directly (the apical membranes), or via the intercellular clefts (the basolateral membranes), and, with alkaline phosphatase occupying the opposite plasma membranes, this structural organization indicates fluid transport toward the lumen. It may be surmised that arachnoid cysts derive from subdural neurothelium differentiating towards arachnoid villus mesothelium.

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mentioning

confidence: 80%

Arachnoid cysts of the Sylvian fissure

Kito¹,

Houthoff²,

Blaauw³

et al. 1984

Journal of Neurosurgery

200

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“…The most appropriate therapeutics for treating arachnoid cyst still remains a matter of controversy. There seems to be a consensus favoring conservative treatment in asymptomatic cases 3,4,10,[13][14][15][16] . However it is known that in such cases there is a great risk of intracranial bleeding (subdural or intra-cystic) after minor trauma.…”

Section: Discussionmentioning

confidence: 99%

“…However it is known that in such cases there is a great risk of intracranial bleeding (subdural or intra-cystic) after minor trauma. The origin of the bleeding is possibly related to rupture of delicate veins, tenuously adherent to the cyst capsule 16,17 . This has led some authors to indicate surgical treatment, even in the asymptomatic cases.…”

Section: Discussionmentioning

confidence: 99%

Arachnoid cyst: adversity ans plasticity

Borges

Zambelli

Fernandes

et al. 1999

Arq. Neuro-Psiquiatr.

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-We report four cases of surgically treated intracranial arachnoid cysts, one with cyst-peritoneal shunt and three with craniotomy and arachnoid membrane resection. Their classification and etiopathogeny are discussed, and especially the different methods of treatment comparing the drastic complications (adversities) with the favorable solutions in severe clinical cases (plasticity) treated at our institution.KEY WORDS: arachnoid cyst, shunt, intracerebral hemorrhage, brain plasticity, craniotomy, endoscopy. Cisto aracnóideo: adversidade e plasticidadeRESUMO -Apresentamos revisão da classificação dos cistos de aracnóide, etiopatogenia e diferentes formas de tratamento em relação às complicações drásticas (adversidade) e às soluções favoráveis (plasticidade) em casos graves, tratados na instituição de origem. Foram tratados quatro casos através de derivação cistoperitoneal ou craniotomia extensa com ressecção da membrana cística, sempre analisados de acordo com a gravidade dos sintomas, localização e extensão da lesão. PALAVRAS-CHAVE: cisto aracnóideo, derivação, hemorragia intracerebral, plasticidade cerebral, craniotomia, endoscopia.The arachnoid cyst consists of a fluid collection covered by a membrane similar to arachnoid, located between the arachnoid and the piamater 1,2 . The congenital arachnoid cyst or primary cyst should be differentiated from other congenital or acquired abnormalities which range from prosencephalic cyst, dilated cisterns, loculations of the subarachnoid space secondary to brain traumatism, hemorrhage or inflammatory processes 2-8 . The heterogeneous cysts are denominated secondary cysts. Arachnoid cysts represent approximately 1% of the intracranial expansive lesions 9 . The origin of the arachnoid cyst is probably related to an abnormal development of the arachnoid, which can divide or duplicate itself 10,11 . Structural features of the arachnoid cyst wall is different from the normal arachnoid membrane 12 . Its symptoms are very diverse, such as headaches, epilepsy, hydrocephaly, intracranial hypertension, macrocephaly, calvarium proeminence, cranial nerves palsies, vertigo, discrete proptosis, hemiparesis, mental retardation or even be asymptomatic. The arachnoid cyst of the middle fossa, the most frequent, is generally discovered in patients under the age of 20, however, it can be found at any age 9 . It is much more common and also more frequent in diagnosed males on the left side. The clinical picture in elderly patients is similar to that of chronic subdural hematoma or normal pressure hydrocephalus, usually in form of dementia, hemiparesis, ataxia, bladder incontinence or gait disturbances 13 .We present a review of the cysts classification , etiopathogeny, different methods of treatment in addition to the drastic complications (adversities) and the favorable solutions in severe clinical cases (plasticity), treated at the institution of origin.

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Primary intracranial arachnoidal cysts

et al. 1991

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Sixty-seven cases (41 males and 26 females) of arachnoidal cysts in children under 11 years are reported. About 53% of cases were diagnosed before 1 year of life. Thirty-one (42.2%) were supratentorial (interhemispheric 9, temporal fossa 10, convexity 5, sylvian fissure 3, supra- and/or retrosellar 4); 31 (46.2%) infratentorial (supra- and/or retrocerebellar 22, foramen of Magendie 3, quadrigeminal cistern 5, pontocerebellar 1); 5 (7.5%) supra- and infratentorial. Macrocephaly was the presenting symptom in 48 cases (71.5%). Associated features were frequent: cranial asymmetry in 24; aqueductal stenosis in 10; agenesis of corpus callosum in 8; deficient cerebellar lobullation in 4; Chiari I malformation in 2; neurofibromatosis type 1 with dysgenetic zones of the brain in 1; arteriovenous malformation in 1. Diagnosis was made at autopsy in six cases in the days before computed tomography and magnetic resonance: three patients had a cyst in the supra- and retrocerebellar midline; two had a cyst in the quadrigeminal cistern and the sixth was a rare case with the cyst passing from the posterior fossa to the left lateral ventricle through a hole in the basal surface of the brain. Small and some middle-sized cysts were not treated. Big and some middle-sized cysts were usually treated by cysto- and/or ventriculoperitoneal shunts. Arachnoidal cysts of the quadrigeminal cistern usually present with aqueductal stenosis and have to be treated with ventriculoperitoneal shunt. Craniotomy and fenestration of the cysts were performed in some cases with good results. The average mental level of these children is usually moderately low.

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Die Aplasie der perisylvischen Region

Cited by 4 publications

References 6 publications

Arachnoid cysts of the Sylvian fissure

Arachnoid cysts of the Sylvian fissure

Arachnoid cyst: adversity ans plasticity

Primary intracranial arachnoidal cysts

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