Role of computed tomography angiography in detection and staging of small bowel carcinoid tumors

Figure 2 Duodenal carcinoid. A 80-year-old male with duodenal carcinoid. Upper endoscopy for screening showed 1.5 cm mass in the 1^st portion of the duodenum. An attempt at endoscopic resection failed, as the mass was too deeply located and invaded the muscularis propria. This case well demonstrates the imaging appearance of the intramural primary tumor as hypervascular mass and the choice of 3D postprocessing methods for optimal evaluation. A: On axial arterial phase imaging, the mass in the wall of the 1^st portion of the duodenum is quite subtle (arrowhead). The mass is much better depicted on a coronal VRT image (B) or a thin slab coronal MPR (C), improving diagnostic confidence, while coronal MIP (D) does not provide good contrast in this case. VRT: Volume rendered technique; MPR: Multiplanar reconstructions; 3D: Three-dimensional; MIP: Maximum intensity projections.