Ultrasonic diagnosis and follow-up of malignant brain tumors in childhood. A report of 4 cases and a review of the literature.

Four patients between the ages of 2 and 20 years with malignant brain tumors were given several sonographic examinations, using an operative calvarial defect or sutural diastasis as an acoustic window. Three of our cases and 86% of cases with malignant brain tumors reported in the literature are echogenic, making possible primary sonographic diagnosis of tumor recurrence and echographic monitoring of tumor therapy.