胃肠道间质瘤71例临床病理及免疫组化分析

 目的 探讨胃肠道间质瘤（GIST）的临床病理特点及免疫组化表型特征。方法 用CD117，CD34，Vim，Act，S-100蛋白质抗体通过组织化学SP法对71例GIST进行研究。结果 该组GIST患者年龄21 ~ 86岁（平均55岁），男34例，女37例，主要以腹部隐痛不适及消化道出血就诊，肿瘤0.3 ~ 23 cm（平均5.8 cm），肿瘤具有梭形和（或）上皮样细胞成分，间质可有团丝样纤维（SF），CD+117 67例（94.4 %），CD+34 52例（73.2 %）。结论 GIST好发于40岁以上中老年人，组织学上类似于平滑肌肿瘤或神经鞘瘤，CD117，CD34是较为特异且敏感的标志物，可能起源于卡哈尔细胞或向卡哈尔细胞分化。

Clinicopathological and immunohistochemical analysis of 71 cases of GIST

Objective To study the clinicopathological and immunophenotypical features of gastrointestinal stromal tumor (GIST). Methods A SP Immunohistochemical method was selected to detect the 71 cases of GIST for a panel of antibodies CD117, CD34, Vim, Act, S-100. Results The patient's ages ranged from 21 years to 86 years (mean 55 years) including 34 male and 37 female. Most cases were diagnosed by bellyache and alimentary tract bleeding. Tumor size varied from 0.3 cm to 23 cm (mean 5.8 cm). GIST were composed of spindle cells and (or) epithelioid cells. Various sized eosinophilic globules were observed between the tumor cells and were designated as skeinoid fibers. The positive rate by immunohistochemical methods for CD117 and CD34 were 94.4 % and 73.2 % respectively. Conclusion GIST predominantly occurred in middle aged or older patients over 40 years. The histological characters are similar to smooth muscle tumor and schwannoma. CD117 and CD34 are more specific and sensitive markers. GIST may have been derived from interstitial cell of cajal or show differentiation toward interstitial cell of Cajal.