Abstract
THE localization of islet-cell tumors producing insulin and gastrin continues to challenge endocrinologists, radiologists, and surgeons. Since no single imaging study has emerged as being clearly superior and safe, we continue to perform an array of examinations, ranging from ultrasonography, the least invasive and expensive, to magnetic resonance imaging and portal venous sampling, the most complex and interventionist. Each new technique is subjected to the litmus test of sophisticated imaging: does it localize functioning islet-cell tumors? Continuing the tradition, in this issue of the Journal Rösch and his colleagues report on their experience with the use of endoscopic ultrasonography to . . .