We report a case of @entity1276 due to posterior @entity11757 . The @entity1 was a 4-year-old @entity1 , presenting @entity10 and @entity390 , with a medical history of @entity1393 2 months before. Cerebrospinal fluid provided no evidence of @entity281 , and symptoms caused by @entity428 gradually deteriorated, although @entity653 infusion was effective temporarily. Computed tomography revealed marked @entity11757 in the right posterior cranial fossa. The subarachnoid space in the posterior fossa was very tight, and the cerebellum and brain stem were compressed anteriorly. Magnetic resonance imaging demonstrated stenosis of the aqueduct and foramens of Luschka and Magendie. The cerebeller tonsil was dislocated inferiorly, indicating impending @entity3976 , so an emergency operation was performed. Ventriculoperitoneal shunt was undertaken after implantation of an Ommaya reservoir for the posterior fossa subdural effusion. The @entity1 's postoperative course was uneventful, and the symptoms were improved. Although @entity11757 following @entity1393 is rare, neuroimaging studies such as CT and MRI should be examined when a young @entity1 suffers from symptoms of @entity428 .

[A case presenting with XXXX and posterior fossa subdural effusion].

@entity1 :: ('9606', 'Species') :: ['patient', 'boy', 'child'] @entity390 :: ('MESH:D009325', 'Disease') :: ['nausea'] @entity3976 :: ('MESH:D004677', 'Disease') :: ['herniation'] @entity1276 :: ('MESH:D006849', 'Disease') :: ['hydrocephalus'] @entity428 :: ('MESH:D019586', 'Disease') :: ['increased intracranial pressure'] @entity653 :: ('MESH:D005990', 'Chemical') :: ['glycerol'] @entity11757 :: ('MESH:D013353', 'Disease') :: ['ventriculomegaly with subdural effusion', 'hydrocephalus and subdural effusion', 'cranial fossa subdural effusion'] @entity281 :: ('MESH:D007239', 'Disease') :: ['infection'] @entity1393 :: ('MESH:D008587', 'Disease') :: ['viral meningitis'] @entity10 :: ('MESH:D006261', 'Disease') :: ['headache']
@entity1276 :: (MESH:D006849,Disease) :: ['hydrocephalus']
