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目的探讨十二指肠神经内分泌肿瘤的CT特点。方法分析4例经病理证实的十二指肠神经内分泌肿瘤的CT表现,并结合文献探讨其临床病理及CT特点。结果 4例中,十二指肠球部1例、降部2例、水平部1例;1例病灶向腔内生长呈息肉状,2例表现为肠壁内肿块,1例病灶呈腔外生长。肿瘤最大径1.6～4.9 cm,平均3.4 cm。4例病灶平扫为等密度或稍低密度,密度均匀者3例,不均匀者1例。增强扫描动脉期病灶强化明显者2例,中度强化2例;均匀强化3例,不均匀强化1例。整个动态增强中肿瘤以动脉期强化明显,门静脉期和平衡期强化程度逐渐降低。结论当十二指肠近段出现息肉样或壁内肿块,CT动态增强病灶早期强化明显,门静脉期及延迟期强化程度逐渐减低时应考虑到神经内分泌肿瘤的可能。
Objective To investigate the CT features of duodenal neuroendocrine tumors. Methods The CT findings of 4 cases of pathologically confirmed duodenal neuroendocrine tumors were analyzed, and their clinical pathology and CT features were analyzed. Results In 4 cases, there were 1 case of duodenal bulb, 2 cases of descending part and 1 case of horizontal part. One case showed polypoid growth in the cavity, 2 cases showed intraluminal mass, 1 case showed extracavitary Grow. The largest tumor diameter of 1.6 ~ 4.9 cm, an average of 3.4 cm. 4 cases of lesions were equal density or slightly lower density, uniform density in 3 cases, 1 case of uneven. In contrast, 2 cases of enhanced arterial phase enhancement and 2 cases of moderate enhancement, 3 cases were homogeneously enhanced and 1 case was heterogeneously enhanced. The whole dynamic enhancement of the tumor to strengthen the obvious arterial phase, portal venous phase and the balance of strengthening gradually reduced. Conclusions When polyps or intramural tumors occur in the proximal duodenum, the dynamic enhancement of CT is obviously enhanced in the early stage, and the possibility of neuroendocrine tumors should be taken into account when the degree of portal vein and delayed phase enhancement is gradually reduced.