The results of ultrasonic findings of patients are discussed who, after a clinical histological and X-ray exanimation, revealed a tumor in the region of the paranasal sinus. Ultrasound diagnostic was performed with the equipment series 7000 (TAU) and 7900 S (linear SIMU) of Kretztechnik with 8-MC transducer. Four cases are demonstrated and discussed.Results confirm the possibility of localization of tumor in the orbit by echography.Findings also reveal that with the help of ultrasonic equipment used in ophthalmology for smooth tissues one possibly can detect early echographic hints for tumor affection of the orbit bones. This is possible also in cases which clinically show no exophthalmos or motility disturbances. Ultrasound examination is, therefore, indicated in all cases of suspicious tumors in the paranasal sinus region.