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[Application of maxillary bone eversion reduction on benign tumor in nasal cavity and paranasal sinus invading the skull base].

OBJECTIVE
To investigate the operative methods for benign tumors in nasal cavity and paranasal sinus invading the skull base.


METHODS
Six cases of benign tumors in nasal cavity and paranasal sinus invading the skull base were reported. Of them, 3 were ossifying fibromas, 1 osteoma, 1 osteochondroma and 1 giant osteoid osteoma. The tumors were removed by combined approaches through unilateral maxillary bone eversion reduction.


RESULTS
No complication was found. Follow-up was made 2-3 years after operation. Five cases were uneventful, 1 had a relapse of tumor but still alive.


CONCLUSIONS
The method is appropriate for treating benign tumors in nasal cavity and paranasal sinus invading the skull base.