Long-Term Sequela of Intrathecal Gadolinium Extravasation: Symptoms Mimicking Post-concussive Syndrome.

Gadolinium contrast administration, usually with magnetic resonance imaging, is an important diagnostic modality in the investigation of neurological pathologies. There is little evidence in the literature suggesting repeated exposure to intrathecal gadolinium results in symptoms mimicking post-concussive syndrome (PCS). We studied one patient who received intrathecal gadolinium to investigate a pain pump malfunction and presented with encephalopathic symptoms of confusion and aphasia with imaging consistent with intracranial gadolinium extravasation. The patient was followed up regularly with repeat imaging, reassessment of persistent symptoms, and specialist evaluations; however, symptoms remained refractory and resembled PCS. Our findings indicate a need to further investigate potential associations between intrathecal gadolinium exposure and a clinical presentation consistent with PCS, irrespective of histopathological changes.