Neuroimaging yield in isolated Horner syndrome.

PURPOSE OF REVIEW: To review the yield of imaging in isolated cases of Horner syndrome in order to better understand if and when imaging will ultimately be beneficial.

RECENT FINDINGS: Imaging in Horner syndrome is commonly performed, however, imaging yield in isolated Horner syndrome has not been extensively studied. A few studies have tried to look into the yield of imaging in such cases and derive conclusions from their findings.

SUMMARY: With limited evidence-based data, the general recommendation for evaluation in pediatric cases of isolated Horner syndrome is physical examination, urinary catecholamines and imaging. In adults, it may be possible to hold-off on imaging of isolated Horner syndrome especially if evidence exists establishing chronic duration.