IEMs are common, accounting for roughly 20% of congenital hearing loss cases, and can be difficult to manage: 8 groups are identified, which are completely different from each other. With a wealth of color figures and extra videos, the book provides an in-depth description of all the relevant aspects: from histopathology assessment, to preoperative evaluation, genetics, different surgical and non-surgical options, and outcomes. The results from two international Consensus Pediatric Auditory Brainstem Implantation Meetings are also included.