Embryology of Inner Ear Malformation Types and Radiologic Relevance.- Preoperative Auditory Evaluation of Patients with Common Cavity Deformity.- Radiology of Common Cavity Deformity.- Electrode Array Design in Common Cavity Deformity.- Cochlear Implantation Technique for Common Cavity Deformity.- Complications management of Common Cavity Deformity Surgery.- Outcomes of Common Cavity Deformity after Cochlear Implantation.- Vestibular Function of Patients with Common Cavity Deformity.