Figure 9. (a) Lung nodule on CT. Although Octreoscan was more sensitive, detecting a hot spot before the nodule became visible on CT, thoracic CT performed several months later precisely located the nodule in the right superior lobe close to the ventral bronchus (arrow). (b) In another patient with insulinoma and gastrinoma related to multiple endocrine neoplasia type-1 (MEN 1), an enhanced mass in the anterior mediastinum on CT proved, after histological examination of the resected tumour, to be a thymic carcinoid. In both cases, neither radiological imaging nor somatostatin receptor scintigraphy was able to distinguish a solitary lung or mediastinal node metastasis from a primary bronchial or thymic carcinoid related to MEN 1.
