Imaging of gastroenteropancreatic neuroendocrine tumors

Figure 9 Gallium 68 DOTATATE positron emission tomography/computed tomography of a patient with right hepatic lobe neuroendocrine tumor metastasis, status post resection, but of unknown primary. A: Axial computed tomography (CT) and fused positron emission tomography/CT (PET/CT) image of the pelvis shows an intensely DOTATATE tracer avid eccentric thickening of the rectum (white arrow), suspicious for a rectal primary. This was histologically confirmed as a neuroendocrine carcinoma; B: Axial CT and fused PET/CT image of the abdomen. Surgical clips are seen along the right liver margin, in keeping with previous surgery. There is an intensely tracer avid focus seen in segment 3 (white arrow). Although there were no obvious findings on the correlative non-contrast CT, this is suspicious for an additional liver metastasis. Note the normal physiological uptake in the kidneys, spleen and liver.