Department of Radiology, Boston University School of Medicine, Boston, MA 02118, USA.
Jpn J Radiol. 2011 Feb;29(2):85-91. doi: 10.1007/s11604-010-0522-1. Epub 2011 Feb 27.
Neuroendocrine tumors of the gastrointestinal tract are rare entities. Functioning neuroendocrine tumors tend to present early because of hormone-induced clinical symptoms, but detection of the primary lesion may be difficult owing to their small size. Neuroendocrine tumors are typically hypervascular and show enhancement after contrast administration on computed tomography (CT) or magnetic resonance imaging (MRI). Large nonfunctioning tumors may be found in asymptomatic patients. In such cases, the synchronous presence of hypervascular hepatic metastases should be explored. This pictorial review illustrates imaging features of functioning and nonfunctioning neuroendocrine tumors arising in the gastrointestinal tract and the pancreas. Modalities included are CT, MRI, ultrasonography, and nuclear medicine. Characteristic histological specimens of these lesions are presented.
胃肠道神经内分泌肿瘤较为罕见。功能性神经内分泌肿瘤由于激素诱导的临床症状而往往较早出现，但由于其体积较小，原发灶的检测可能较为困难。神经内分泌肿瘤通常为富血管性肿瘤，在 CT 或 MRI 增强扫描后可见强化。无症状患者可能会发现大的无功能性肿瘤。在这种情况下，应探索是否存在富血管性肝转移。本影像学综述阐述了胃肠道和胰腺来源的功能性和无功能性神经内分泌肿瘤的影像学特征。包括 CT、MRI、超声和核医学。还呈现了这些病变的典型组织学标本。
