An oral soft tissue lesion associated with a sinus mass.

A case of an inflammatory nasal polyp extending through an oroantral fistula and appearing as an intraoral soft tissue lesion is discussed. Although this is apparently a rare occurrence, the nature of the lesion was suggested by the history, clinical appearance, and radiographic findings. Surgical intervention and removal of the inflammatory lesion was followed by complete healing with closure of the oroantral fistula.