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We describe a follow-up in a 15-year-old boy with neuroborreliosis diagnosed by clinical symptoms, CSF and serum analysis. MRI revealed a thalamic lesion and an enhancement of the right trigeminal nerve clinically associated with mild hypasthesia in the right maxillary region. Both, clinical symptoms and radiological findings disappeared within 2 months after treatment. Borrelia burgdorferi specific IgM and IgG in CSF and IgG in serum became negative between 6 and 12 months after diagnosis. We show that neuroborreliosis at an early stage may present only with moderate neurological deficits and that at this stage MRI reveals distinct cerebral lesions which might even precede clinical manifestation. Thus, early diagnosis and treatment of neuroborreliosis may prevent persistent neurologic lesions.