We report two @entity1 with asymptomatic @entity145 which resolved spontaneously without any surgical intervention and history of major head and body @entity130 . The first @entity1 was a 10-year-old @entity1 with an @entity145 in the right sylvian fissure. The second @entity1 was a 1-year-old @entity1 with a right cerebral convexity @entity145 . Both of them were asymptomatic. @entity145 spontaneously disappeared within 2 years following initial diagnosing. There was no major head and body @entity130 except usual home, school and sports activity. We speculated that the cysts ruptured into cerebrospinal fluid circulation by the mechanical effects of some forced activities to the brain tissue and cyst, such as excessive @entity1353 , coughing and sport activities. These factors may change the balance between intracystic and pericystic pressure and facilitate the rupturing of the cyst into subdural, subarachnoid and intraventricular spaces. These cases demonstrate that neurosurgical intervention of asymptomatic @entity145 is not absolutely indicated in the paediatric age group. Close follow up with computerized tomography (CT) and magnetic resonance imaging (MRI) is a treatment option in the @entity1 with @entity145 located in the middle cranial fossa and cerebral convexity.

Spontaneous disappearance of two asymptomatic XXXX in two different locations.

@entity1 :: ('9606', 'Species') :: ['children', 'girl', 'patient', 'boy', 'child'] @entity145 :: ('MESH:D016080', 'Disease') :: ['arachnoid cysts', 'Arachnoid cysts', 'arachnoid cyst'] @entity130 :: ('MESH:D014947', 'Disease') :: ['trauma'] @entity1353 :: ('MESH:D004417', 'Disease') :: ['breathing']
@entity145 :: (MESH:D016080,Disease) :: ['arachnoid cysts']
