胃肠道间质瘤87例临床病理分析

  目的 探讨胃肠道间质瘤（GISTs）的临床病理特点。方法 应用常规病理及免疫组化观察87例胃肠道间质瘤，并复习相关文献。结果 本组GISTs均为成年人，年龄28 ~ 73岁，平均53岁。发生于胃56例，小肠29例，结肠2例。镜下肿瘤由梭形细胞和上皮样细胞以不同的比例构成。瘤细胞vimentin均阳性，CD117，CD34多为弥漫强阳性，SMA、S-100在肿瘤向平滑肌和神经方向分化时阳性。结论 GISTs好发于中老年人，肿瘤由梭形细胞和上皮样细胞构成，免疫组化特征为CD117，CD34阳性。

A clinicopathologic and immunohistochemical study on 87 cases of gastrointestinal stromal tumors

Objective To study the clinical, pathological and immunohistochemical characteristics of gastrointestinal stromal tumors (GISTs). Methods 87 cases of GISTs were studied with conventional histopathological and immunohistochemical stains. Results All patients were adults, age range 28 to 73 years (mean 53 year), the tumors were situated in stomach (56 cases), in small intestine (29 cases), in colon (2 cases). The tumors had two kinds of cells: spindle cells and epithelioid cells, they were different in proportion. Immunohistochemically, vimentin were all positive, CD117 and CD34 showed diffuse strong expression, SMA and S-100 were positive when the tumors differentiated to smooth muscle and nerve. Conclusion GISTs predominantly occurred in middle aged or old patients, the tumors were composed of spindle cells and epithelioid cells. The immunohistochemical characters were positive for CD117 and CD34.