Abstract
1. Transposition of cerebral arteries in aneurysmal surgery was performed in 3 MCA aneurysm cases and one ACA aneurysm and one ACoA aneurysm cases. 2. This technique was effective intense cases whom we had to decide immediately and accidentary to make collateral circulation and complete clipping or trapping through STA could not be used for donor. 3. This method was more effective to obtain enough circulation and simplify in technique and shorten the operation time than STA-MCA anastomosis. 4. Difficulty in technique, for example, deep and nallow field, was the solved problem.
