This Open Access book on Complications in Neurosurgery contains the proceedings of the 2nd ICCN conference held in Mumbai in 2019. The work illustrates and discusses key point of intra- and postoperative complications encountered in brain, spine and peripheral nerve surgery. In addition, this compilation addresses topics in ethics, with further contributions covering medico legal and didactic aspects. It draws from the experience of an international team of experts from all subspecialties in neurosurgery, including oncology, vascular, spine, pediatrics and others. The articles were written by renown specialists in the field who are stepping forward to share their valuable professional experience with colleagues following their joint mission to improve future patient care.