Chamadol Nittaya, Laopaiboon Vallop, Promsorn Julaluck, Bhudhisawasd Vajarapongsa, Pagkhem Ake, Pairojkul Chawalit
Department of Radiology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.
J Med Assoc Thai. 2009 Sep;92(9):1213-9.
To describe anatomical distribution and CT findings of gastrointestinal stromal tumors in Srinagarind Hospital.
The abdominal CT images of 16 patients (12 men, 4 women: mean age 49 +/- 17SD) with pathologically proven GISTs during 1998-2005 were retrospectively reviewed. The tumor sites, sizes, borders, growth patterns, patterns of enhancement, and sign of malignancy were evaluated. The findings of benign and malignant GISTs were compared.
Among sixteen patients, the most common location of GISTs was stomach (56.25%). The others were small bowel (43.75%), and tumor size larger than 5 cm. The present study found that the smooth and mixed smooth and irregular surface lesions are equal in number (50%). The growth was extraluminal in 56.25%. Almost all tumors had inhomogeneous density (n = 15). Intratumoral gas (43.75%), fluid (37.5%), and calcification (50.00%), were present in the tumors. All cases showed inhomogeneous contrast enhancement. The CT signs of malignancy found were invasion of the adjacent organ(s) (62.5%), lymphadenopathy (25%), liver metastasis/nodule (18.75%), ascites (6.25%), perilesional fat plane stranding (93.75%), and pleural effusion (6.25%).
The most common site of GISTs is the stomach. The typical tumors appear as inhomogeneous enhancing inhomogeneous extraluminal mass with either well-defined or irregular border. The CT findings cannot be used as a single tool for differentiating the benign from malignant GISTs.
描述诗里那琳医院胃肠道间质瘤的解剖分布及CT表现。
回顾性分析1998年至2005年间16例经病理证实为胃肠道间质瘤患者（12例男性，4例女性；平均年龄49±17标准差）的腹部CT图像。评估肿瘤部位、大小、边界、生长方式、强化方式及恶性征象。比较良性和恶性胃肠道间质瘤的表现。
16例患者中，胃肠道间质瘤最常见的部位是胃（56.25%）。其他部位为小肠（43.75%），且肿瘤大小大于5cm。本研究发现表面光滑及光滑与不规则混合的病变数量相等（50%）。56.25%的肿瘤呈腔外生长。几乎所有肿瘤密度不均匀（n = 15）。肿瘤内可见气体（43.75%）、液体（37.5%）及钙化（50.00%）。所有病例均表现为不均匀强化。发现的恶性CT征象包括侵犯相邻器官（62.5%）、淋巴结肿大（25%）、肝转移/结节（18.75%）、腹水（6.25%）、病灶周围脂肪平面条索状影（93.75%）及胸腔积液（6.25%）。
胃肠道间质瘤最常见的部位是胃。典型肿瘤表现为不均匀强化的腔外肿块，边界清晰或不规则。CT表现不能作为鉴别胃肠道间质瘤良恶性的单一依据。
