RT Journal Article SR Electronic T1 Selective MR imaging approach for evaluation of patients with Horner's syndrome. JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 223 OP 227 VO 13 IS 1 A1 K B Digre A1 W R Smoker A1 P Johnston A1 M R Tryhus A1 H S Thompson A1 T A Cox A1 W T Yuh YR 1992 UL http://www.ajnr.org/content/13/1/223.abstract AB PURPOSE To assess the usefulness of MR in the evaluation of patients with Horner's syndrome.PATIENTS AND METHODS We prospectively performed MR imaging in 33 patients with Horner's syndrome (13 preganglionic and 20 postganglionic) using a protocol specifically designed for pre- and postganglionic varieties of this syndrome. Assignment of patients to pre- or postganglionic categories was performed on the basis of pharmacologic testing.RESULTS Abnormalities in one-half of the patients with preganglionic Horner's syndrome included lateral medullary infarct, spinal cord/root disease, apical lung tumor, and paravertebral metastatic mass. Three of 20 patients with postganglionic Horner's syndrome had carotid artery dissection.CONCLUSION Routine scanning of patients who have postganglionic Horner's syndrome with cluster headaches was not helpful in our small series.