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第四节
肠道

和间叶性肿瘤等。细针穿刺的诊断作用很小。个别情况下,肠道黏膜下的包块病变,如GIST(图3-23)、平滑肌瘤(图3-24)、脂肪瘤等可以利用EUS-FNA取得足够的样本进行诊断。其细胞学特征见第三节。

077-01

图3-23 结肠黏膜下GIST,内镜指导下的FNA穿刺样本
A. 松散的梭形细胞团,异型性不明显(200×,巴氏染色)
B. 梭形细胞团,细胞排列紧密(400×,Diff-Quik染色)
C. FNA样本制成的细胞块(100×,HE染色)
D. DOG1染色强阳性(200×)
E. c-kit染色强阳性(200×)
(Dr. Zhongren Zhou,Rochester Medical Center,NY惠赠)

078-01

图3-24 结肠黏膜下平滑肌瘤FNA穿刺样本
A. 间质成分及少许梭形细胞(200×,Diff-Quik染色)
B. 梭形细胞团,细胞核细长,无细胞异型性(400×,巴氏染色)
C. FNA标本制成的细胞块组织切片(200×,HE染色)
D. 平滑肌标记物SMA染色阳性(200×)
E. CD117/c-kit染色阴性(200×)
F. DOG1染色阴性(200×)
(Dr. Zhongren Zhou,Rochester Medical Center,NY惠赠)

参考文献

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