Primary mastoid cyst

Objective: To report an unusual case of a primary mastoid cyst (congenital or developmental) in a patient without otological symptoms. Method: Case report and review of the English language literature. Results: Primary mastoid cyst is a newly reported and very rare pathological entity. Mastoid cysts usually occur secondary to chronic infection, inflammation or trauma. Review of the medical literature highlights the rarity of this condition. Conclusion: This report describes the experience gained by the diagnosis and management of this patient. It emphasises the importance of clinical vigilance so that proper treatment may be instituted in a timely manner.