Superficial siderosis: A rare occurrence in children.

Superficial siderosis of the central nervous system results from deposition of hemosiderin in the subpial layers of the brain and spinal cord. Patients usually present after 40 years of age with progressive ataxia and sensorineural hearing impairment. We present the case of a twelve-year-old boy who had a surgery of the posterior fossa at the age of two years and then developed recurrent headaches, instability of gait, and hearing deficit at around ten years of age. Clinical examination revealed progressive ataxia and mild sensorineural hearing loss. He also had infrequent seizures with mild electroencephalographic abnormality. His serial magnetic resonance imaging (MRIs) showed a progressive deposition of hemosiderin in the cerebellar folia and around the brainstem, confirming a diagnosis of superficial siderosis. This case report draws attention to this rare condition, usually seen in adults, even though rarely it can be seen in children as a chronic sequela of surgery of the posterior fossa.