The utilization of neurodiagnostic tests in the initial work-up in children with brain tumors was relatively stable during the three years before computed tomography (CT) became available. After this test became available there was a significant ( P .05) reduction in the utilization of cerebral angiography, echoencephalography, electroencephalography, and ventriculography in children with tumors below the tentorium. In children with tumors above the tentorium, only a reduction in the use of cerebral angiography and radioisotopic scanning was demonstrated. These changes have resulted in a significant ( P .05) reduction in cost to the patient (or third party) for the initial neurodiagnostic work-up. Since CT became available, children with brain tumors undergo fewer tests, and the greatest reduction has been in tests that have the greatest cost.
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