A surgical procedure related to diseased mastoid cells. It is present in skull hollow space and mainly spreads from ear due to infection. This procedure is followed to treat cholesteatoma and during implant of cochlear aid. It has few risk factors which include changes in taste, weakness in face and also cause loss of hearing.Online Journals are scholarly and peer reviewed journals. The journals provide forum and motivates scientists, researchers, academics, engineers, and practitioners in all aspects to share their professional and academic knowledge in the fields computing, engineering, humanities, economics, social sciences, management, medical science, and related disciplines. Online Journals also aims to reach a large number of readers worldwide with original and current research work completed on the vital issues of the above important disciplines. The journals permit all readers to read, view, download and print the full-text of all published articles without any subscription or restrictions.