Brain surgeries aim to eliminate the pathological process without damage to brain tissues. The neurosurgeon reviews and assesses preoperative diagnostic information and intraoperative tools to make a decision including orientation and delineation of the pathological mass throughout the surgery. Intraoperative ultrasound is an available cheap tool which provides intraoperative safety and confidence to the surgeon for achieving total brain mass lesions resection. This study encourages to use IOUS.