INTRODUCTION: @entity145 are cavities with a content similar to cerebrospinal fluid, frequently communicating with the subarachnoid space. They make up 1% of the intracranial space occupying lesions, and although typically seen in @entity1 (13%), they may be undiagnosed until the @entity1 has become adult. @entity1 AND METHODS: We review a series of 35 cases of @entity145 in @entity1 , which had been investigated in the Neuropaediatric Department during 1987 1999. The @entity1 had had cranial CAT and MR, and transcranial echography studies. RESULTS: In 85.7% there was a single cyst. The Sylvan fissure and posterior fossa were the commonest sites. The age of diagnosis was under 1 year in 54.3% and at birth in 25.7%. There were other associated @entity3002 in 31.4%, with agenesis of the @entity6789 in 45.5%. The most frequent clinical features on presentation of the condition were @entity4651 (31.4%) and @entity302 crises (25.7%). The surgical treatment most often used was cystoperitoneal shunt. CONCLUSIONS: Congenital @entity145 are caused by alteration in the embryogenesis of the central nervous system, and hence their association with other @entity600 and prevalence in @entity1 . The most frequent clinical findings were @entity4651 , due to the size of the cyst or the associated @entity1276 , and @entity302 secondary to cortical @entity146 caused by pressure. Management of symptomatic lesions is surgical. The cystoperitoneal shunt was generally used in our series, since this was followed by clinical improvement in most cases.

[Intracranial XXXX . A study of a series of 35 cases].

@entity1 :: ('9606', 'Species') :: ['children', 'patients', 'patient', 'PATIENTS'] @entity1276 :: ('MESH:D006849', 'Disease') :: ['hydrocephaly'] @entity146 :: ('MESH:D001523', 'Disease') :: ['irritation'] @entity3002 :: ('MESH:D009421', 'Disease') :: ['malformations of the central nervous system'] @entity600 :: ('MESH:D000014', 'Disease') :: ['malformations'] @entity145 :: ('MESH:D016080', 'Disease') :: ['arachnoid cysts', 'Arachnoid cysts', 'congenital intracranial arachnoid cysts'] @entity302 :: ('MESH:D004827', 'Disease') :: ['epileptic seizures', 'epileptic'] @entity4651 :: ('MESH:D058627', 'Disease') :: ['macrocephaly'] @entity6789 :: ('MESH:D061085', 'Disease') :: ['corpus callosum']
@entity145 :: (MESH:D016080,Disease) :: ['arachnoid cysts']
