樱花全自动密闭式组织脱水机应用体会

目的提高组织标本处理质量,更好发挥脱水机的作用。方法在使用日本樱花(SAKURA)全自动密闭式组织脱水机过程中,对设置程序、试剂更换和管道清洗,对仪器使用、维护、保养和常见故障排除等方面进行探讨。结果处理组织标本效率提高,处理效果得到改善,制作的切片达到优质切片质量标准。结论对SAKURA全自动密闭式组织脱水机的使用,不能过于机械地照搬固有操作模式,只有在工作中不断摸索才能更好应用,使3种不同型号全自动密闭式组织脱水机衔接起来,达到组织标本处理标准化和规范化。     

肺腺癌EGFR、KRAS基因突变、ALK融合蛋白状态分析

目的 分析肺腺癌中EGFR、KRAS、ALK三种肿瘤驱动基因的突变状态及与其临床病理特征、肿瘤分期的关系.方法 85例肺腺癌EGFR,KRAS基因突变采用ARMS法检测,ALK融合蛋白用特异性抗ALK单克隆抗体(克隆号:D5F3)采取免疫组织化学法检测.结果 EGFR,KRAS,和ALK融合蛋白检测阳性率分别是62％,15％,和14％.EGFR基因突变更常见于女性.KRAS基因突变更常见于男性及有吸烟史患者.ALK融合蛋白更常见于年轻及肿瘤分期Ⅲ/Ⅳ患者.检测中发现了8例双突变病例.结论 结果 进一步证实了EGFR、KRAS基因突变与ALK融合蛋白并非完全互斥.对于肺腺癌患者进行全面的基因检测非常重要,在选择靶向治疗时更应考虑到多种变异同时存在的情况.     

DOG-1在胃肠道间质瘤中的表达及其临床意义

Objective To investigate the expression of DOG-1 in gastrointestinal stromal tumors (GIST)and its diagnostic application.Methods Immunohistochemical EnVision technique was used to assess the expression of DOG-1 in 84 cases of GIST in comparison with CD117 and CD34.Results All 84cases of GIST consisted of variable proportions of spindle and epithelioid tumor cells or iust one type of the tumor cell. The expression rates of DOG-1,CD117 and CD34 were 91.3%(42/46),95.7%(44/46)and 82.6%(38/46),in the group of very low and low risk GIST,and were 100%(38/38),100%(38/38)and 78.9%(30/38),respectively,in the group of moderate and hiish risk GIST. leiomyomas,schwannomas,fibromatosis and normal gastrointestinal mucoca did not express these markers.Moreover, the sensitivity and specificity of DOG-1 in the detection of GIST were similar to those of CD117.without statistical difference(P＞0.05)between the two markers.However,the sensitivity and specificity of DOG-1 detection of moderate and high risk GIsT were significandy higher than those of CD34(P＜0.01).Conclusions DOG-1 is a novel marker of gastrointestinal stromal tumors.It has the sensitivity and specificity hisher than CD34,especially in the detection of moderate and high risk GIST.Combined DOG-1and CD117 immunohistochemistry will likely improve the diagnostic accuracy of GIST.     

不同固定液冷冻切片HE染色质量的对比观察

目的观察4种固定液对冷冻切片染色质量的影响,从中筛选固定效果最佳的固定液。方法收集60例新鲜组织,其中良性18例,恶性42例,行冷冻切片,分别采用丙酮、95%乙醇、AAF液、改良AAF液固定苏木精-伊红染色法(HE)染色,观察染色效果。结果丙酮、95%乙醇固定的切片,组织结构不清晰,核、质着色不佳;AAF液固定的切片,组织结构较清晰,核着色较鲜艳,胞质着色淡;改良AAF液固定的切片,组织结构清晰,核、质着色鲜艳。结论复合固定液固定的冷冻切片HE染色效果优于单纯固定液,其中改良AAF液效果最佳。