A Mass-like Brainstem Lesion as an Unusual Presentation of Neuroborreliosis

Neuroborreliosis is an uncommon manifestation of Lyme disease, typically presenting with peripheral neuritis, radiculopathy and/or meningitis. We present an atypical case of central nervous system involvement characterized by a mass-like brainstem lesion and additional supratentorial white matter lesions, radiologically mimicking an inflammatory demyelinating process and posing a significant diagnostic challenge.