[Diagnosis of the breast tumor entity with "vocal fremitus" in ultrasound diagnosis].

In the published study a totally new method for the diagnosis of malign and benign tumors of the female breast is presented. During sonographic examinations with the maximum entropy method we found out, purely by chance, that artifacts produced by vibrations of the thorax can be used to differentiate malignant from benign lesions. These artifacts in form of small colour pixels can be provoked by the vocal fremitus of the internal medicine or by humming a deep sound. In case of malignancy, the colour artifacts are visible inside of the tumor, in benign lesions, however, only in the surrounding tissue. On the preoperative day, 95 patients were examined with the method described above. In 91% of the cases the diagnosis of the dignity corresponded with the histological results. Seven times a benign lesion was classified as a malignant tumor and twice malignancy was not correctly diagnosed. Our explanation of these phenomena is the following: Benign lesions of the female breast show a displacing growth and a definable boundary. Thus the vibrations are damped and not conducted into the tumor. In contrast, malignant lesions grow invasively into the surrounding tissue. Consequently, the vibrations can be conducted into the center of the tumor by this dissemination.