This book consists of overall brain stem anatomical briefs and dozens of interesting cases. Each case is demonstrated with baseline information on the disease, CT/MR, surgical planning, postoperative complication, follow-up and discussion. The work contains up-to-date surgical procedures such as hematoma evacuation assisted by navigation, stereotaxic techniques in the brain stem hematoma drainage, hematoma evacuation via infratemporal approach and occipital median approach. The work illustrates the surgical procedure systematically in the field of primary pontine hemorrhage. The preoperative planning, intraoperative founding and postoperative judgment in each case, help the readers to understand the complexity of the disease as well as the surgical boundary.