Figure 4.

Images from patients with small bowel neuroendocrine tumors. A and B, Images from a 69-year-old patient presenting with melena. Axial (A) and sagittal (B) arterial phase images demonstrate a plaquelike hyperenhancing mass typical of a small bowel neuroendocrine tumor (arrows). C, Image from an 80-year-old woman receiving long-term anticoagulation for atrial fibrillation presenting to the emergency department with rectal passage of bright-red blood. Enteric phase computed tomographic enterographic image shows an enhancing plaquelike mass with typical serosal retraction or buckling of the small bowel wall caused by a small bowel neuroendocrine tumor (arrow). D, Image from a 77-year-old-man presenting with iron-deficiency anemia. Enteric phase computed tomographic enterographic image shows abnormal bowel wall edema (arrowheads) caused by a scirrhous mesenteric metastatic lesion with punctate calcifications (arrow) typical of a neuroendocrine tumor, which had obstructed the mesenteric veins.