Abstract
A case of MLF syndrome developed immediately after a basilar aneurysm surgery was reported. This 48-year-old lady with proven subarachnoid hemorrhage was admitted on day 9 in grade II (Hunt & Kosnik) and a neck clipping of the basilar bifurcation aneurysm was performed via a pterional approach on day 14. The operation was smooth and uneventful, and neither a temporary occlusion of the parent artery nor an induced hypotension was necessary during the operation. Immediately after the operation, however, the patient presented the MLF syndrome with disturbance of convergence (anterior type of MLF syndrome by Cogan). No other brain stem signs were present.
Solitary MLF syndrome unassociated with other brain stem signs is very rare, and the aneurysm surgery as a cause of the MLF syndrome has not been reported. The etiology of the syndrome in this patient was briefly discussed.
