Lyme disease can cause vasculitis, strokes... Neuroborreliosis means Neuro Lyme.

QUOTE:
We report on a 11-year-old boy who had 2 acute hemiparesis episodes over a period of 1 month. He suffered from headache and fatigue since 1 year. He could not remember neither a tick bite nor a local erythematous skin lesion. Cranial MRI showed left capsulothalamic inflammation and a vasculitis. The patient was successfully treated by ceftriaxone. Neuroborreliosis should be considered in all children with stroke-like episode, even in the absence of a history of a tick bite.

2007

http://www.ncbi.nlm.nih.gov/pubmed/1...ubmed_RVDocSum

AND here, http://www.ncbi.nlm.nih.gov/pubmed/1...RVAbstractPlus

This concludes the same thing-

1: Neuropediatrics. 2002

Large cerebral vessel occlusive disease in Lyme neuroborreliosis.

We report on a 12-year-old, previously healthy girl with an acute hemiparesis as the predominant clinical manifestation of Lyme neuroborreliosis (LNB).
We conclude that LNB should be considered in every stroke-like episode of unknown origin in children, even in the absence of a history of a tick bite or typical skin lesions.

QUOTE:
http://www.ncbi.nlm.nih.gov/pubmed/1...RVAbstractPlus

Ischemic stroke caused by neuroborreliosis

Ischemic stroke in children is rare and its etiology is frequently unknown. CASE REPORT: We report the case of a nine-year-old boy who presented a right ischemic lenticular stroke due to neuroborreliosis, with a good outcome after antibiotic treatment.

AND


Lyme neuroborreliosis mimics stroke: a case report.


Lyme neuroborreliosis is diagnostically challenging because of its diverse manifestations. The well-documented neurologic spectrum includes lymphocytic meningitis, cranial neuropathy, and radiculoneuritis in the early disseminated stage; and peripheral neuropathy, chronic encephalomyelitis, and mild encephalopathy in the late persistent stage.

http://www.ncbi.nlm.nih.gov/pubmed/1...RVAbstractPlus