[Significance and value of ultrasonography in the study of thyroid diseases].

Two hundred-fifty ultrasonic examinations of the thyroid gland were performed in 213 patients within a 2-year period. The size and the structure of the thyroid can be determined by sonography. Ultrasound proved to be of primary importance in the diagnosis of thyroid cysts and provides additional information in other thyroid diseases. Aspiration for cytological examination can be more effective with sonographic guidance. Changes during treatment can also be followed up without discontinuing the suppressive treatment.