Mastoid osteoma: report of two cases.

INTRODUCTION Mastoid osteoma is a rare benign tumour. In this article, the authors report two new cases of mastoid osteoma and discuss the modalities of diagnosis and management. CASE REPORTS Both patients presented with a retroauricular mass that had been slowly increasing in size over several years. The patients consulted for the cosmetic deformity induced by the lesion or moderate tenderness. The diagnosis was based on the clinical presentation and non-contrast CT. The osteoma was surgically resected in one patient. DISCUSSION/CONCLUSION Mastoid osteoma is a rare, slowly growing, and usually asymptomatic benign tumour. Diagnosis is based on clinical findings and CT. Surgery is indicated for symptomatic or cosmetically unacceptable osteomas.