Read the full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=49842 DOI: 10.4236/ijohns.2014.35046 Author(s) Kartik Parelkar, Vandana Thorawade, Mohan Jagade, Rajesh Kar, Madhavi Pandare, Rajanala Nataraj, Reshma Hanwate, Anoop Attakil, Rohini Kashide ABSTRACT Osteoma is a slow-growing tumor formed by mature bone tissue. In the temporal bone, intracanalicular osteomas are more frequent while extracanalicular ostemoas are rare. They very rarely occur over the mastoid region.eww140923gjr They are treated mainly for cosmetic purposes. These are readily excised and recurrence is rare after complete excision. In this case report, we want to revisit this rare mastoid osteoma and discuss the differential diagnosis and treatment. We believe that this report will be of interest to otolaryngologists when dealing with temporal bone osteomas. KEYWORDS Osteoma, Mastoid, HRCT Temporal Bone