Organized intrasylvian subarachnoid hematoma in post-traumatic child with dyskinesia for 8 years: a case report and review of the literature.

Object: The authors present their experience with an organized intrasylvian subarachnoid hematoma (OISH) in a post-traumatic pediatric patient with dyskinesia for nearly 8 years.

Methods: An 11-year-old Chinese boy was admitted to the authors' hospital because of dyskinesia in his right upper and lower extremities. When he was 18 months old, he fell down from a trolley and then his mouth drooped to a right angle. The brain computer tomography (CT) revealed a space-occupying lesion in his left temporoparietal region. The symptom improved after 20 days of acupuncture therapy in local hospital. Two years later when he was 4 years old, his right lower limb became lame gradually with sensorial deficit. A concealed arteriovenous malformation was suggested by the brain magnetic resonance imaging and magnetic resonance angiography at that time. The child had been treated with ginkgo biloba leaf extract from 2001 to 2007 and the symptom improved gradually during that period. However, the symptom of his right upper and lower extremities deteriorated continually since January 2007. He fell down again when he was walking 1 month before he was admitted to the authors' department in July 2007. An enlarged left pterional craniotomy was performed to remove the lesion. Histopathology diagnosis was compatible with an organized hematoma with remote hemorrhage and gliosis. The child is presently healthy after 1 year's follow-up.

Conclusion: The rarity of an OISH in a post-traumatic pediatric patient with dyskinesia for nearly 8 years makes this case very peculiar. This is the first reported pediatric case of OISH found in the literature.