[B-scan sonography as a screening method in the search for tumors. Results of an investigation of 305 children (author's transl)].

With B-scan sonography a method of investigation is available which is characterized by simple, rapid and painless application, no side effects and which can be repeated as often as desired, thus enabling investigation to be performed in outpatients. In a mass echographic examination of 305 infants, a pathologic finding in the abdominal and retroperitoneal region was detected in 5% of them. A result of our investigations and literature search we believe that B-scan echography in experienced hands is a necessary extension of the preventive program as a method of screening in infancy.