Inverted papillomas form about 0.4 to 5% of nasal tumors. They usually present as unilateral firm, bulky, red and vascular masses. We present three cases which were initially diagnosed as a maxillary mucocele, pansinusitis and antrochoanal polyp based on clinical and radiological findings. It is important to keep the diagnosis of inverted papilloma in mind in unilateral diseases of the paranasal sinuses as a more radical approach is required.
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