Professor Juha Hernesniemi, Associate Professor Mika Niemelä, Professor Vinko Dolenc (Ljubljana, Slovenia), Professor Ali F. Krisht (Little Rock, AR, USA), Professor Ugur Türe (Istanbul, Turkey), Professor Rokuya Tanikawa (Sapporo, Japan), Professor Michael T. Lawton (San Francisco, CA, USA), Professor Evandro de Oliveira (Sao Paulo, Brazil) and Professor James I. Ausman (Los Angeles, CA, USA) along with senior, junior and nursing staff will demonstrate and discuss different approaches and microsurgical techniques in live operations in various lesions (aneurysms, AVMs, cavernomas, extrinsic and intrinsic tumors and spine surgery).