Abstract
The results of 100 exploratory sinusotomy in reference with the symptoms, radiographic findings, CT findings and histopathological results lead us to conclude that:
1. Exploratory sinusotomy has been useful for an early detection of malignancy and its direction of expansion.
2. Cancer of the maxillary sinus originating in the medial wall tended to present similar symptoms to those of unilateral maxillary sinusitis, which often made the differential diagnosis difficult.
3. Mucopyocele of the maxillary sinus causally relating to previous sinusectomy could be associated with malignancy for which the exploratory sinusotomy has been found to be very useful for an early diagnosis.
