胃肠道间质瘤：计算机断层扫描特征
Gastrointestinal stromal tumor: Computed tomographic features.
作者信息
Lee Chi-Ming, Chen Hsin-Chi, Leung Ting-Kai, Chen Ya-Yen
机构信息
Department of Diagnostic Radiology, Taipei Medical University Hospital, Taipei, Taiwan, China.
出版信息
World J Gastroenterol. 2004 Aug 15;10(16):2417-8. doi: 10.3748/wjg.v10.i16.2417.
AIM
Gastrointestinal stromal tumor (GIST) is a rare type of cancer. Computed tomography (CT) is an imaging modality of choice for diagnosing GIST. The aim of this retrospective study was to review the CT imaging features of 17 GIST patients.
METHODS
From 1995 to 2003, there were 47 patients with pathologically proven GISTs at our hospital. Of these, 17 patients underwent preoperative CT. We collected and analyzed these CT images. The CT imaging features included tumor diameter, number and location, tumor margin, location of metastasis, hounsfield units of tumor and effect of contrasts. In addition, we also recorded the surgical findings, including complications, tumor size and location for comparative analysis.
RESULTS
The results showed that 12 (70%) tumors were located in the stomach and five (30%) were located in the jejunum mesentery. GISTs were extraluminal in 12 (70%) patients. The tumor margins of 13 (76%) tumors were well defined and irregular in four (24%). The effect of contrast enhancement on GIST CT imaging was homogenous enhancement in 13 (76%) and heterogeneous enhancement in four (24%). The hounsfield units (HU) were 30.41 +/-5.01 for precontrast images and postcontrast hounsfield units were 51.80 +/- 9.24.
CONCLUSION
The stomach was the commonest site of GIST occurrence among our patients. The CT features of GIST were well-defined tumor margins, homogenous enhancement on postcontrast CT images.
目的
胃肠道间质瘤（GIST）是一种罕见的癌症类型。计算机断层扫描（CT）是诊断GIST的首选成像方式。本回顾性研究的目的是回顾17例GIST患者的CT成像特征。
方法
1995年至2003年，我院有47例经病理证实的GIST患者。其中，17例患者术前行CT检查。我们收集并分析了这些CT图像。CT成像特征包括肿瘤直径、数量和位置、肿瘤边缘、转移部位、肿瘤的亨氏单位以及造影剂效果。此外，我们还记录了手术结果，包括并发症、肿瘤大小和位置以进行对比分析。
结果
结果显示，12例（70%）肿瘤位于胃，5例（30%）位于空肠系膜。12例（70%）患者的GIST位于腔外。13例（76%）肿瘤的边缘清晰，4例（24%）不规则。GIST的CT成像造影剂增强效果为13例（76%）均匀增强，4例（24%）不均匀增强。平扫图像的亨氏单位（HU）为30.41±5.01，增强后亨氏单位为51.80±9.24。
结论
在我们的患者中，胃是GIST最常见的发生部位。GIST的CT特征为肿瘤边缘清晰，增强CT图像上均匀增强。
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