[The diagnosis of tumours of the paranasal sinus (author's transl)].

Radiographic appearances of tumours of the paranasal sinus are often equivocal. One must try to differentiate the main radiologic signs--shadow, and changes in the walls (tumour, inflammation?). A few important data are given. But examples also show the sources of error. The need for immediate diagnostic-surgical measures in all cases of even minimal suspicion of malignancy is obvious.