American Journal of Roentgenology, Vol 173, 1109-1115, Copyright © 1999 by American Roentgen Ray Society

ARTICLES

Intrathecal gadolinium-enhanced MR myelography and cisternography: a pilot study in human patients

Q Zeng, L Xiong, JR Jinkins, Z Fan and Z Liu
Department of Radiology, General Coal Hospital, Beijing, People's Republic of China.

OBJECTIVE: This study was designed to evaluate the safety, MR imaging characteristics, and clinical response to intrathecal gadopentetate dimeglumine (gadolinium) administration in human patients. SUBJECTS AND METHODS: Eleven adult patients were included in this prospective study. Via lumbar puncture, a single dose of either 0.2 ml, 0.5 ml, or 1.0 ml of gadolinium (500 mmol/l) mixed with 5 ml of previously removed CSF was slowly injected into the lumbar subarachnoid space. Immediate and delayed MR imaging were subsequently carried out using a 1.0-T magnet. RESULTS: No patient manifested gross behavioral changes, neurologic alterations, or seizure activity. The intrathecal gadolinium-enhanced MR myelography revealed disk herniation (n = 4), posttraumatic spinal stenosis (n = 3), postsurgical noncommunicating cyst (n = 1), myelitis (n = 1), intradural extramedullary mass formation (n = 1), and intradural vascular malformation (n = 1). CONCLUSION: This pilot study shows the relative safety and feasibility of low-dose intrathecal gadolinium administration. The potential clinical applications include the evaluation of obstructions and communications of the subarachnoid space, spontaneous or traumatic CSF leaks, and CSF dynamics. Additional animal and human studies must be performed to further evaluate the long- term safety and to prove the clinical applications of this procedure in a larger number of subjects.
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