This book aims to provide a deeper understanding of Third Mobile Window Syndrome and its various forms beyond just Superior Canal Dehiscence. It will illuminate the various presentations of Third Mobile Window Syndrome, provide the means for diagnosis, and elucidate treatments. The disorder Superior Semicircular Canal Dehiscence Syndrome was discovered in 1995 by Dr Lloyd Minor at The John Hopkins University School of Medicine in Baltimore. Though he published his findings in 1998, there remains no book wholly devoted to the topic. For this reason, many neurotologists and otorhinolaryngologists still misunderstand this condition and its presentation. Structured in six parts, the first part will be important in providing a context, and drawing together all of the learning that has been acquired since 1998, as well as explaining the complexities of the condition.