Contrast enhancement of cerebrospinal fluid on delayed MRI in a patient with an epidural abscess and renal failure.

Cerebrospinal fluid (CSF) is normally of low signal intensity on T1 weighted MRI. The case of a patient with renal failure who developed an epidural abscess, and in whom the CSF appeared of high signal intensity on delayed T1 weighted MRI is presented. Possible mechanisms for this are discussed.