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表1 不同组胃癌患者的临床和病理特征比较
Table 1 Comparison of clinical and pathological characteristics among different groups of gastric cancer patients
HER2 absent HER2 low HER2 high
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Variables χ /H P
expression(n=35) expression(n=46) expression(n=29)
Sex[n(%)] 1.490 0.475
Male 23(65.71)00 0.32(69.57) 0.023(79.31)
Female 12(34.29)00 0.14(30.43) 0.006(20.69)
Age[year,M(P25,P75)] 66(57,74)0 0.67(56,72) 0.068(66,76) 2.177 0.337
Tumor location[n(%)] 5.328 0.506
Cardia 7(20.00)0 0.12(26.09) 0.008(27.59)
Fundus 3(8.57)00 0.01(2.17) 0.008(27.59)
Body 15(42.86)00 0.13(28.26) 0.011(37.93)
Antrum 10(28.57)00 0.20(43.48) 0.002(6.90)
Lauren type[n(%)] 8.999 0.061
Intestinal 7(20.00)0 0.18(39.13) 0.015(51.72)
Mixed 14(40.00)00 0.17(36.96) 0.010(34.48)
Diffuse 14(40.00)00 0.11(23.91) 0.004(13.79)
Maximum tumor diameter[cm,M(P25,P75)] 6.26(3.50,7.59) 5.50(3.39,7.00) 06.50(4.55,9.00) 4.145 0.126
Differentiation[n(%)] 8.138 0.017
Poor 31(88.57)00 0.30(65.22) 0.017(58.62)
Moderate 4(11.43)0 0.16(34.78) a 0.012(41.38) a
AJCC stage[n(%)] 8.456 0.172
Ⅰ 2(5.71)00 0.02(4.35) 0.000(0.00)
Ⅱ 4(11.43)0 0.07(15.22) 0.001(3.45)
Ⅲ 15(42.86)00 0.15(32.61) 0.007(24.14)
Ⅳ 14(40.00)00 0.22(47.83) 0.021(72.41)
Distant metastasis[n(%)] 8.945 0.011
Yes 14(40.00)00 0.22(47.83) 0.022(75.86)
No 21(60.00)00 0.24(52.17) 0.007(24.14) ab
Signet ring component[n(%)] 15.955 <0.001
Yes 17(48.57)00 0.13(28.26) 0.001(3.45) ab
No 18(51.43)00 0.33(71.74) 0.028(96.55) ab
CEA categorical[n(%)] 44.444 <0.001
≥5 ng/mL 6(17.14)0 0.27(58.70) a 0.029(100.00) ab
<5 ng/mL 29(82.86)00 0.19(41.30) 00.00(0) ab
CEA[μg/L,M(P25,P75)] 2.17(1.37,3.89) 7.07(2.83,18.22) a 30.73(19.63,82.90) ab 52.206 <0.001
The serum CEA detection utilizes the standardized testing platform of our hospital’s clinical laboratory,with a cutoff value of 5 ng/mL(the recom⁃
mended upper limit of normal reference for the reagent kit,which is the commonly used threshold in domestic clinical practice).Comparisons of age,le⁃
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sion length and continuous serum CEA levels among the three groups were performed using the Kruskal⁃Wallis H test,while the χ test was adopted for
comparisons of the remaining categorical variables. Post⁃hoc pairwise comparisons were performed using the Dunn test with Bonferroni correction ap⁃
plied. a:compared to the HER2 absent expression group,P < 0.016 7;b:compared to the HER2 low expression group,P < 0.016 7.
低表达人群基数庞大,HER2 低表达状态的精准识 建预测胃癌HER2表达模型 等。 F⁃FDG PET/CT以
[22]
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别是该人群能否从抗HER2靶向治疗中受益的前提。 其应用广泛、无创、可重复、可半定量评估肿瘤代谢活
目前,手术或活检组织的IHC联合FISH检测是 性及全身一站式成像等优点,已在多项研究中被证实
[12]
评估 HER2 表达状态的“金标准”,但该方法存在有 其代谢参数可预测胃癌HER2表达阳性 。Park等 [23]
创性等固有局限,近年来越来越多的研究转向探索 研究发现,HER2 阳性组的 PET 代谢参数 SUVmax
非侵入性、智能化替代方案,包括应用深度学习模型 明显高于阴性组。本研究将 HER2 表达状态分为
[21]
分析胃癌病理切片 、以及基于能谱CT定量参数构 3 组,分析发现 MTV 80%、TLG 80%、SUVmax 以及 HI 在

