[Focal liver lesion as an incidental finding. 1: Diagnostic management--procedure in sonographically echo-free tumors].

The spread of diagnostic ultrasound has led to an increase in the incidental detection of lesions of the liver in patients with unrelated symptoms and no history of tumor disease. In this article, suggestions are made on how to proceed with the further diagnostic workup of such patients. In part 1 these suggestions are aimed at identifying patients who might benefit from further investigation, while at the same time avoiding unnecessary procedures.