胃完全囊变胃肠道间质瘤三例CT特征并文献复习

CT Features of Three Cases of Gastric Gastrointestinal Stromal Tumor with Complete Cystic Degeneration and Literature Review

目的分析胃完全囊变胃肠道间质瘤(GIST)的影像征象,以提高对该病的认识。方法回顾性分析本院3例及文献报道13例全囊变胃肠道间质瘤(GIST)临床及CT检查资料,总结其特点。结果显示发病年龄31~79岁,平均62岁。男性9例,女性7例,主要症状为腹痛或排黑便。肿瘤最大径4~18 cm,平均9.8cm,CT表现呈单房囊性(13/16)、腔外生长多见(14/16),囊壁多均匀、光滑,厚度约2~5mm(13/16),囊壁可有钙化(4/16),囊内多呈均匀液性密度,增强均表现仅囊壁轻中度均匀强化,内部无强化,周围器官结构少见受累。结论胃完全囊变GIST临床罕见,其CT表现尚具有一定特征,但最终确诊取决于组织病理学及免疫组化学检查。

Objective To analyze the imaging features of complete cystic gastrointestinal stromal tumor(GIST)in order to improve the understanding of the disease.Methods The clinical and CT findings of 3 cases of total cystic gastrointestinal stromal tumor(GIST)in our hospital and 13 cases reported in the literature were reviewed retrospectively.Results Showed that the age of onset ranged from 31 to 79 years,with an average of 62 years.There were 9 males and 7 females.The primary symptoms were abdominal pain or black stool.The longest diameter of the tumor is 4~18 cm,with an average of 9.8 cm.The CT findings are unilocular cystic(13/16)and extraluminal growth is common(14/16).The cystic wall is uniform and smooth,with a thickness of about 2~5 mm(13/16).The cystic wall can have calcification(4/16).Most of the cysts show uniform liquid density.The enhancement is only mild to moderate uniform enhancement of the cystic wall,and there is no enhancement inside.Peripheral organ structures are rarely involved.Conclusion Complete cystic change of stomach is rare in GIST,and its CT findings still have some characteristics,but the final diagnosis still depends on histopathology and immunohistochemistry.