Sinonasal Myxoma: A Distinct Lesion of Infants.

An 11 month old Caucasian male presented with swelling of the right side of the nose and buccal vestibule of unknown duration. Radiographic images revealed a well-circumscribed, hypodense soft tissue mass with a peripheral hyperdense circumference involving the anterior aspect of the right maxilla. The lesion extended from the inferior aspect of the orbital rim superiorly to the maxillary bone inferiorly without invading any nearby structures. The lesion was completely resected via combined extraoral and intraoral approach. The clinical, radiographic, histologic and immunohistochemical features of a sinonasal myxoma in an infant are discussed.