Osteomas are osteoblastic mesenchymal tumour composed of well-differentiated mature osseous tissue with a laminar structure. Osteoma is a benign slow growing bone tumour with predominance in long bones, and is rare in the skull. They are a very rare present in the mastoid temporal bone, being usually asymptomatic for long time and treated mainly for cosmetic reasons. This is a retrospective study of the clinical presentation, management and complications of temporal bone osteoma done from April 2015 to may 2019. The study population is twelve patients, all who has been radiologically and histopathologically proven to be entire case of osteoma. Out of the 12 patients, 7 were females and the rest 5 were males. All cases had swelling behind the ear, impairment of hearing in 1 case and 6 cases had pain over swelling. The duration of symptoms ranged from 8 months to 6 years. Out of total 12 patients 1 case had mastoid region involvement along with extension to external auditory canal. The surgical excisions depend on the symptoms, size of tumor, and its complication All Patient underwent complete excision of the tumour and then the bone at margin and base was drilled with a diamond burr to remove the mass completely without any significant complication. The entire specimen was sent for histopathological examination and diagnosis of osteoma was confirmed. The clinical presentation and radiological features of osteoma are characteristic but differential diagnosis should include eosinophilic granuloma, giant cell tumour, monostotic fibrous dysplasia, solitary variant of multiple osteoma, and osteoblastic metastasis. Osteomas present on the mastoid or squamous portion of the temporal bone need to be dealt for cosmetic purposes or if they are causing symptoms, while surgery should include careful removal of periosteal cover and safe margin of the mastoid cortex around it.

Keywords: Mastoid temporal bone; Postaural swelling Temporal bone tumours; Osteoma.