Inetetamab combined with tegafur as second-line treatment for human epidermal growth factor receptor-2-positive gastric cancer: A case report

BACKGROUND Human epidermal growth factor receptor-2(HER-2)plays a vital role in tumor cell proliferation and metastasis.However,the prognosis of HER2-positive gastric cancer is poor.Inetetamab,a novel anti-HER2 targeting drug independently developed in China,exhibits more potent antibody-dependent cell-mediated cytotoxicity than trastuzumab,which is administered as the first-line treatment for HER2-positive gastric cancer in combination with chemotherapy.In this case,the efficacy and safety of inetetamab combined with tegafur was investigated as a second-line treatment for HER2-positive gastric cancer.CASE SUMMARY A 52-year-old male patient with HER2-positive gastric cancer presented with abdominal distension,poor appetite,and fatigue two years after receiving six cycles of oxaliplatin combined with tegafur as first-line treatment after surgery,followed by tegafur monotherapy for six months.The patient was diagnosed with postoperative recurrence of gastric adenocarcinoma.He received 17 cycles of a combination of inetetamab,an innovative domestically developed anti-HER2 monoclonal antibody,and tegafur chemotherapy as the second-line treatment(inetetamab 200 mg on day 1,every 3 wk combined with tegafur twice daily on days 1–14,every 3 wk).Evaluation of the efficacy of the second-line treatment revealed that the patient achieved a stable condition and progression-free survival of 17 months.He tolerated the treatment well without exhibiting any grade 3-4 adverse events.CONCLUSION Inetetamab combined with chemotherapy for the treatment of metastatic HER2-positive gastric cancer demonstrates significant survival benefits and acceptable safety.

Tyrosine kinase inhibitors and human epidermal growth factor receptor-2 positive breast cancer

The body of evidence investigating human epidermal growth factor receptor-2(HER2)directed therapy in patients with breast cancer(BC)has been growing within the last decade.Recently,the use of tyrosine kinase inhibitors(TKIs)has been of particular interest in the treatment of human malignancies.This literature commentary is intended to highlight the most recent findings associated with the widely-studied TKI agents and their clinical significance in improving the outcomes of HER2 positive BC.

Human epidermal growth factor receptor-2 gene amplification in gastric cancer using tissue microarray technology

AIM:To assess human epidermal growth factor receptor-2 (HER2)-status in gastric cancer and matched lymph node metastases by immunohistochemistry (IHC) and chromogenic in situ hybridization (CISH).METHODS:120 cases of primary gastric carcinomas and 45 matched lymph node metastases from patients with full clinicopathological features were mounted onto multiple-punch and single-punch tissue microarrays,respectively,and examined for HER2 overexpression and gene amplification by IHC and CISH.RESULTS:Twenty-four tumors (20%) expressed HER2 immunohistochemically.An IHC score of ≥ 2+ was observed in 20 tumors (16.6%).HER2 amplification was detected by CISH in 19 tumors (15.8%) and in their matched lymph node metastases.A high concordancerate was found between HER2 positivity (as detected by IHC) and HER2 gene amplification (as detected by CISH),since 19 of the 20 IHC positive cases were amplified (95%).All amplified cases had 2+ or 3+ IHC results.Amplification was associated with intestinal phenotype (P < 0.05).No association with grading,staging or survival was found.CONCLUSION:In gastric cancer,HER2 amplification is the main mechanism for HER2 protein overexpression and is preserved in lymph node metastases.

High levels of serum platelet-derived growth factor-AA and human epidermal growth factor receptor-2 are predictors of colorectal cancer liver metastasis

AIM To develop predictive markers in blood for colorectal cancer liver metastasis.METHODS Twenty colorectal cancer patients were selected and divided into two groups. Group A consisted of 10 patients whose pathological TNM stage was ⅢC(T3-4N2M0), while another 10 patients with synchronous liver metastasis(TNM stage Ⅳ) were recruited for group B. During the surgical procedure, a 10-ml drainage vein(DV) blood sample was obtained from the DV of the tumor-bearing segment prior to the ligation of the DV. At the same time, a 10-ml peripheral vein(PV) blood sample was collected via peripheral venipuncture. The serum levels of 24 molecules that are potentially involved in the mechanism of liver metastasis in both DV blood and PV blood were analyzed by using high-throughput enzyme-linked immunosorbent assay technology.RESULTS Univariate analysis revealed that platelet-derivedgrowth factor AA(PDGFAA) in DV blood(d PDGFAA)(P = 0.001), PDGFAA in PV blood(p PDGFAA)(P = 0.007), and human epidermal growth factor receptor-2 in PV blood(p HER2)(P = 0.001), p MMP7(P = 0.028), pR ANTES(P = 0.013), and pE GF(P = 0.007) were significantly correlated with synchronous liver metastasis. Multivariate analysis identified d PDGFAA(HR = 1.001, P = 0.033) and p HER2(HR = 1.003, P = 0.019) as independent predictive factors for synchronous liver metastasis. Besides, high peripheral HER2 level may also be a risk factor for metachronous liver metastasis, although the difference did not reach statistical significance(P = 0.06). Significant correlations were found between paired DV and PV blood levels for PDGFAA(r = 0.794, P < 0.001), but not for HER2(r = 0.189, P = 0.424).CONCLUSION PDGFAA in tumor drainage and HER2 in PV blood may be useful predictive factors for synchronous liver metastasis of colorectal cancer.

Evaluation of human epidermal growth factor receptor 2 status of breast cancer using preoperative multidetector computed tomography with deep learning and handcrafted radiomics features

Objective:To evaluate the human epidermal growth factor receptor 2(HER2)status in patients with breast cancer using multidetector computed tomography(MDCT)-based handcrafted and deep radiomics features.Methods:This retrospective study enrolled 339 female patients(primary cohort,n=177;validation cohort,n=162)with pathologically confirmed invasive breast cancer.Handcrafted and deep radiomics features were extracted from the MDCT images during the arterial phase.After the feature selection procedures,handcrafted and deep radiomics signatures and the combined model were built using multivariate logistic regression analysis.Performance was assessed by measures of discrimination,calibration,and clinical usefulness in the primary cohort and validated in the validation cohort.Results:The handcrafted radiomics signature had a discriminative ability with a C-index of 0.739[95%confidence interval(95%CI):0.661-0.818]in the primary cohort and 0.695(95%CI:0.609-0.781)in the validation cohort.The deep radiomics signature also had a discriminative ability with a C-index of 0.760(95%CI:0.690-0.831)in the primary cohort and 0.777(95%CI:0.696-0.857)in the validation cohort.The combined model,which incorporated both the handcrafted and deep radiomics signatures,showed good discriminative ability with a C-index of 0.829(95%CI:0.767-0.890)in the primary cohort and 0.809(95%CI:0.740-0.879)in the validation cohort.Conclusions:Handcrafted and deep radiomics features from MDCT images were associated with HER2 status in patients with breast cancer.Thus,these features could provide complementary aid for the radiological evaluation of HER2 status in breast cancer.

Human epidermal growth factor receptor 2 positive rates in invasive lobular breast carcinoma: The Singapore experience

BACKGROUND Invasive lobular carcinomas(ILC)form 5%-10%of breast cancer and rarely show overexpression of human epidermal growth factor receptor 2(HER2).AIM To describe the prevalence and prognostic factors of HER2 positive(HER2+)ILC in an Asian population.METHODS A retrospective review of patients with ILC seen between January 1985 and March 2018 at various SingHealth medical institutions was conducted.Demographic and clinical data were collected from medical records.We examined clinicopathological characteristics and survival in relation to HER2 status.RESULTS A total of 864 patients were included.Prevalence of HER2 positivity was 10.1%(87 patients).Compared with HER2 negative(HER2-)ILC,HER2+ILC was associated with a higher proportion of estrogen receptor negative(24.4%vs 5.9%,P<0.001),progesterone receptor negative(PR-)(40.2%vs 24%,P=0.002)and grade 3 tumours(Grade 3,29.0%vs 10.2%,P<0.001).Overall survival rate was poorer in patients with HER2+compared to HER2-ILC(56.7%vs 72.9%alive at 10 years;hazard ratio 1.87,95%confidence interval:1.21-2.90,P=0.004).Based on multivariate analysis,negative prognostic factors for overall survival included HER2 positivity,PR negativity,older age,Indian ethnicity and higher tumour stage.CONCLUSION Prevalence of HER2+ILC was 10.1%.HER2+ILC was more likely to have poorer prognostic features such as estrogen receptor negative,PR-and higher tumour grade,and have a poorer survival.

Inetetamab combined with pyrotinib and oral vinorelbine for patients with human epidermal growth factor receptor 2 positive advanced breast cancer:A single-arm phase 2 clinical trial

Background Human epidermal growth factor receptor 2(HER2)-targeted agents have significantly improved the outcomes of patients with HER2-positive breast cancer;however,a large proportion of patients still develop resistance to trastuzumab.In this study,we investigated the efficacy and safety of inetetamab,another anti-HER2 antibody,combined with pyrotinib and oral vinorelbine in patients with HER2-positive advanced breast cancer so as to provide new ideas for the treatment.Methods In this prospective,single-arm,phase 2 trial,patients with HER2-positive advanced breast cancer with disease progression after trastuzumab were recruited.Patients received a combination of inetetamab(loading dose of 8 mg/kg and subsequent doses of 6 mg/kg intravenously once every 3 weeks),pyrotinib(400 mg orally once daily),and vinorelbine(60 mg/m^(2)orally once weekly)until disease progression or intolerable toxicity.The primary endpoint was progression-free survival(PFS).The secondary endpoints included objective response rate(ORR),overall survival(OS),disease control rate(DCR),and safety.Results Between February 13,2022 and December 25,2022,30 patients were screened and enrolled in this study.The median age of the patients at enrollment was 54 years,12 patients(40.0%)had hormone-receptor-positive disease and 23 patients(76.7%)had visceral metastasis.The median PFS was 8.63 months(95%confidence interval[CI]4.15-13.12 months).The median OS was not reached.The ORR was 53.3%(16/30)and the DCR was 96.7%(29/30).The most common Grade III/IV adverse events were leukopenia(n=5,16.7%),neutropenia(n=4,13.3%),and diarrhea(n=3,10%).No treatment-related serious adverse events or deaths occurred.Conclusions The combination regimen of inetetamab,pyrotinib,and oral vinorelbine showed encouraging efficacy and favorable safety in patients with HER2-positive advanced breast cancer and could be considered as an alternative treatment option for the patients.

伊尼妥单抗治疗人表皮生长因子受体2阳性转移性乳腺癌伴胃肠功能紊乱1例

乳腺癌是女性常见的肿瘤,如今乳腺癌实体肿瘤通过相应的治疗可取得较好的疗效,但人表皮生长因子受体2(HER2)阳性乳腺癌侵袭性较强、恶性程度高,需引起患者及医务人员的重视。本文回顾性分析1例激素受体阴性、HER2阳性伴胃肠功能紊乱的乳腺癌患者诊治经过。患者初诊为局部晚期炎症乳腺癌伴腋窝淋巴结转移,给予新辅助化疗及手术治疗。术后3年后病情进展,予以伊尼妥单抗联合白蛋白紫杉醇,后续伊尼妥单抗单独靶向治疗,病情持续缓解。提示对于HER2阳性晚期乳腺癌,伊尼妥单抗是个很好的单抗类药物选择。

miRNA-27a与TOP2A蛋白在乳腺癌化疗中的表达水平及效能评估

目的探析微核糖核酸-27a(microRNA-27a,miRNA-27a)与DNA拓扑异构酶Ⅱα(TopoisomeraseⅡ-Alpha,TOP2A)蛋白在乳腺癌化疗中的表达水平及预测效能。方法回顾性分析2020年1月至2022年1月聊城市人民医院乳甲外科收治的47例乳腺癌患者的病案资料,均接受化疗治疗。用实时荧光定量PCR法进行血浆miRNA-27a表达水平的检测,用免疫组织化学法进行TOP2A蛋白表达情况的检测。比较乳腺癌患者化疗前后的miRNA-27a、TOP2A蛋白表达水平差异,采用Logistic回归分析法探析miRNA-27a、TOP2A蛋白与乳腺癌化疗预后不良的关系,绘制受试者工作特征(Receiver Operating Characteristic,ROC)曲线分析miRNA-27a、TOP2A蛋白在乳腺癌化疗疗效预测中的应用价值。结果47例患者开始化疗后第4个月的miRNA-27a、TOP2A蛋白检测值显著低于化疗前(入院时)(P<0.05)。开始化疗后第4个月,预后良好35例(74.47%),预后不良12例(25.53%),预后良好组的miRNA-27a、TOP2A蛋白检测值低于预后不良组。Logistic分析结果显示,miRNA-27a、TOP2A蛋白高表达是乳腺癌化疗预后不良的危险因素(P<0.05)。ROC曲线结果显示,miRNA-27a、TOP2A蛋白联合预测乳腺癌化疗预后不良的曲线下面积(0.875,95%CI:0.798~0.952)最大,敏感度、特异性分别为91.67%、94.29%(P<0.05)。结论miRNA-27a、TOP2A蛋白在乳腺癌化疗预后不良中呈高表达,若乳腺癌化疗患者miRNA-27a、TOP2A蛋白表达水平显著上升,侧面说明患者病情可能有恶化风险,化疗疗效有限。

双靶向新辅助药物联合不同化疗治疗HER-2阳性乳腺癌临床疗效比较

目的探讨双靶向新辅助药物联合不同化学药物治疗(简称化疗)的方案治疗人类表皮生长因子受体-2(HER-2)阳性乳腺癌的临床疗效。方法选取凉山彝族自治州第一人民医院2019年1月至2022年12月收治的HER-2阳性乳腺癌患者110例,按治疗方案的不同分为TcbHP组和AC-THP组,各55例。TcbHP组患者予曲妥珠单抗和帕妥珠单抗联合紫杉类(多西他赛或紫杉醇)和卡铂治疗,以21 d为1个周期,共治疗6个周期;AC-THP组患者予曲妥珠单抗和帕妥珠单抗联合蒽环类药物(吡柔比星或表柔比星)和环磷酰胺治疗,以21 d为1个周期,曲妥珠单抗和帕妥珠单抗及其他药物分别治疗4个周期,共8个周期。结果TcbHP组患者病理完全缓解率为61.80%,稍高于AC-THP组的50.90%(P>0.05)。治疗后,TcbHP组恶心,呕吐,腹泻,心脏毒性及手足综合征程度均显著低于AC-THP组(P<0.05);各肿瘤标志物[糖类抗原(CA19-9,CA125,CA153),癌胚抗原(CEA)]水平均显著低于AC-THP组(P<0.05);左心室射血分数(LVEF)及血清心肌肌钙蛋白I(cTnI)、肌酸激酶同工酶MB(CK-MB)、氨基末端脑钠肽前体(NT-proBNP)水平均无明显变化(P>0.05),且均显著优于AC-THP组(P<0.05)。结论TcbHP方案治疗HER-2阳性乳腺癌的疗效与AC-THP方案相当,但前者降低肿瘤标志物生成的作用更明显,且心脏毒性风险相对更低。

3D-STI参数评价抗HER-2药物对乳腺癌患者心室功能变化的价值

目的 探讨三维斑点追踪成像(Three Dimensional Speckle Tracking Imaging,3D-STI)参数评价抗人表皮生长因子受体-2(Human Epidermal Growth Factor Receptor-2,HER-2)药物对乳腺癌患者心室功能变化的价值。方法 选取我院2021年6月至2022年6月收治的50例需行辅助化疗乳腺癌患者作为观察组,选择同期30名健康志愿者作为对照组。比较对照组与观察组化疗前,化疗第2、4、6周期常规超声心动图指标与3D-STI参数,以临床病理诊断为“金标准”,并绘制3D-STI参数受试者工作特征(Receiver Operating Characteristic,ROC)曲线。结果 观察组化疗第6周期E/A值低于对照组和化疗前(P<0.05),观察组化疗第2、4、6周期左心室扭转、心肌综合指数值低于对照组和化疗前(P<0.05),观察组化疗第4、6周期整体纵向应变(GlobalLongitudinalStrain,GLS)低于对照组和化疗前(P<0.05);ROC曲线显示GLS敏感度最高,为96.00%,整体圆周应变特异性最高,为96.67%。结论 3D-STI参数可评估乳腺癌患者抗HER-2药物化疗后心室功能变化,为临床早期干预提供诊断依据。

乳腺癌患者HER2、CA153表达与声触诊组织成像定量技术参数的相关性分析

目的:分析乳腺癌患者人表皮生长因子受体2(HER2)、糖类抗原153(CA153)表达与声触诊组织成像定量(VTIQ)技术参数的相关性。方法:选取2018年5月至2020年5月合肥市第三人民医院收治的80例女性乳腺癌患者,其中世界卫生组织(WHO)分期Ⅰ期14例、Ⅱ期22例、Ⅲ期31例、Ⅳ期13例;另选取同时间段收治的53例女性乳腺良性疾病患者为对照。所有患者先行常规超声检查,随后进入超声VTIQ成像模式获得剪切波速度(SWV)均值参数;采用免疫组织化学法检测乳腺组织中HER2表达,采用罗氏E411电化学发光免疫分析仪检测血清CA153水平;采用Pearson法分析乳腺癌患者血清CA153水平与SWV均值的相关性。结果:与良性患者比较,乳腺癌患者VTIQ技术参数SWV均值、血清CA153水平及HRR2阳性表达率均显著升高,差异有统计学意义(F=39.107,78.353,P<0.05);与乳腺癌Ⅰ+Ⅱ期患者比较,乳腺癌Ⅲ、Ⅳ期患者VTIQ技术参数SWV均值、血清CA153水平、HRR2阳性表达率均显著升高,差异有统计学意义(t=2.685、3.556、8.326、10.455,P<0.05);与乳腺癌Ⅲ期比较,乳腺癌Ⅳ期患者VTIQ技术参数SWV均值、血清CA153水平、HRR2阳性表达率均显著升高,差异有统计学意义(t=4.632、8.659,P<0.05)。与HER2阴性表达乳腺癌患者SWV均值比较,HER2阳性表达乳腺癌患者SWV均值升高,差异有统计学意义(χ^(2)=59.751,P<0.05)。乳腺癌患者血清CA153水平与SWV均值呈正相关(r=0.501,P<0.05)。结论:乳腺癌患者VTIQ参数SWV均值与乳腺癌患者生物标志物HER2、CA153表达水平密切相关。

ER、PR、HER-2及Ki-67表达与乳腺癌患者新辅助化疗后病理完全缓解的相关性分析

目的:分析雌激素受体(estrogen receptor,ER)、孕激素受体(progesterone receptor,PR)、人表皮生长因子受体-2(human epidermal growth factor receptor-2,HER-2)及Ki67抗原(Ki-67)表达与乳腺癌患者新辅助化疗后病理完全缓解(pathologic complete response,pCR)的相关性。方法:回顾性分析2022年1月—2023年12月在江西省肿瘤医院行新辅助化疗的200例乳腺癌患者的临床资料,根据化疗后手术病理标本,分为pCR组68例和非pCR组132例,比较两组临床资料和ER、PR、HER-2及Ki-67表达,多因素logistic回归分析ER、PR、HER-2及Ki-67表达与pCR的相关性。结果:单因素分析显示,pCR组临床分期Ⅱ期比例高于非pCR组,ER、PR阴性比例均高于非pCR组,HER-2阳性比例高于非pCR组,Ki-67≥20%比例高于非pCR组,差异均有统计学意义(P<0.05)。多因素logistic回归分析显示,临床分期Ⅲ期、ER阳性、PR阳性、HER-2阴性、Ki-67<20%是乳腺癌新辅助化疗后pCR的危险因素(P<0.05)。结论:ER、PR、HER-2及Ki-67表达是乳腺癌患者新辅助化疗后pCR的影响因素,可为临床治疗提供依据。

THP方案新辅助治疗HER-2阳性乳腺癌的真实世界研究

目的 了解THP方案在真实世界临床实践的应用状况,同时评价该方案的疗效、安全性和耐受性。方法 选择在保定市第一中心医院等河北省11家三级甲等医院接受THP方案新辅助治疗并完成序贯手术的HER-2阳性乳腺癌患者70例为研究对象,制订专用的患者资料信息收集表,专人负责收集符合纳入标准患者的临床病理资料。评估THP方案的有效性、安全性和耐受性。主要研究终点为病理完全缓解(pCR)率、≥3级不良反应的发生率、既定治疗方案完成率。结果 总人群pCR率为54.3%。亚组分析显示,cTNMⅠ-Ⅱ期、激素受体阴性、HER-2 IHC3+患者的pCR率分别显示出高于c TNMⅢ期、激素受体阳性、HER-2 IHC2+/FISH+患者的趋势,但差异无统计学意义(P>0.05)。4周期患者的pCR率显著高于4周期以上患者(P<0.05)。≥3级不良反应发生率为4.3%。既定方案完成率为98.6%。结论THP方案在河北省得到广泛应用,是HER-2阳性乳腺癌患者新辅助治疗的有效方案,安全性及耐受性良好,可以考虑作为激素受体阴性、肿瘤负荷较小、对联合化疗耐受性差患者的新辅助备选方案。

TAC化疗方案联合西妥昔单抗、帕妥珠单抗治疗HER2阳性乳腺癌的效果观察

目的:观察TAC化疗方案(多西他赛^(+)多柔比星^(+)环磷酰胺)联合西妥昔单抗、帕妥珠单抗治疗人表皮生长因子受体2(HER2)阳性乳腺癌的效果。方法:选取2020年4月—2021年12月甘肃省人民医院收治的HER2阳性乳腺癌患者68例作为研究对象,采用随机数字表法分成观察组与对照组,各34例。对照组采用TAC化疗方案治疗,观察组在对照组基础上采用西妥昔单抗、帕妥珠单抗双靶向治疗。比较两组治疗效果、免疫功能、新生血管指标。结果:观察组治疗总有效率高于对照组,差异有统计学意义(P=0.028)。治疗前,两组CD3^(+)、CD4^(+)、CD4^(+)/CD8^(+)水平比较,差异无统计学意义(P>0.05);治疗后,两组CD3^(+)、CD4^(+)、CD4^(+)/CD8^(+)水平降低,观察组高于对照组,差异有统计学意义(P<0.05)。治疗前,两组三叶因子1(TFF1)、人类泛素偶联酶E2C(UBE2C)水平比较,差异无统计学意义(P>0.05);治疗后,两组TFF1、UBE2C水平降低,观察组低于对照组,差异有统计学意义(P<0.05)。结论:TAC化疗方案联合西妥昔单抗、帕妥珠单抗治疗HER2阳性乳腺癌的应用效果显著,可改善免疫功能及血管生成指标。

吡咯替尼在人表皮生长因子受体2阳性晚期乳腺癌患者中的应用效果观察

目的:观察吡咯替尼在人表皮生长因子受体2(HER2)阳性晚期乳腺癌患者中的应用效果。方法:选取2021年5月—2023年12月贵阳市妇幼保健院收治的HER2阳性晚期乳腺癌患者60例作为研究对象,采用随机数字表法分为对照组与观察组,各30例。对照组接受多西他赛、卡铂、曲妥珠单抗方案治疗,观察组在对照组基础上联合吡咯替尼进行治疗。比较两组治疗效果、不良反应严重程度。结果:观察组客观缓解率高于对照组,差异有统计学意义(P=0.038);两组恶心呕吐、腹泻、白细胞减少与血小板减少严重程度比较,差异无统计学意义(P>0.05)。结论:吡咯替尼在HER2阳性晚期乳腺癌患者中的应用效果显著,可提高客观缓解率,且未加重不良反应。

阿贝西利联合非甾体类芳香化酶抑制剂一线治疗HR+/HER2-绝经后晚期乳腺癌患者的效果观察

探讨针对激素受体阳性/人类表皮生长因子受体2阴性(HR+/HER2-)绝经后晚期乳腺癌患者应用阿贝西利联合非甾体类芳香化酶抑制剂一线治疗的效果。以玉林市红十字会医院在2022年1月—2023年4月收治的92例HR+/HER2-绝经后晚期乳腺癌患者为研究对象,采用随机数字表法将其分为对照组(n=46,应用非甾体类芳香化酶抑制剂一线治疗)和研究组(n=46,在对照组基础上应用阿贝西利治疗),对比两组疗效、不良反应发生率、生活质量。研究发现,针对HR+/HER2-绝经后晚期乳腺癌患者应用阿贝西利联合非甾体类芳香化酶抑制剂一线治疗,疗效有所提高,不良反应未增加,安全性较高,患者生活质量显著提高,值得推广。

曲妥珠单抗生物仿制药对比原研药治疗复发或转移性HER-2阳性乳腺癌的药物经济学评价

目的从卫生体系角度评估曲妥珠单抗生物仿制药(汉曲优)与原研药(赫赛汀)治疗复发或转移性人表皮生长因子受体2(HER-2)阳性乳腺癌的经济性。方法根据NCT03084237试验数据构建分区生存模型,模拟周期为3周,模拟时限为10年。以成本和质量调整生命年(QALY)为产出指标,采用成本-效用分析法评价上述2种方案的经济性。采用单因素敏感性分析和概率敏感性分析检验模型的稳健性。结果曲妥珠单抗生物仿制药组与原研药组的成本分别为111516.72、111122.30元,效用分别为1.52、1.36 QALYs,增量成本-效果比(ICER)为2465.12元/QALY,小于以3倍中国2023年人均国内生产总值(GDP)作为的意愿支付(WTP)阈值(268200元/QALY)。单因素敏感性分析结果表明,曲妥珠单抗生物仿制药费用与曲妥珠单抗原研药费用对ICER有较大影响。概率敏感性分析结果显示,当WTP阈值大于14902元/QALY时,曲妥珠单抗生物仿制药组具有经济性的概率为100%。结论当WTP阈值为3倍中国2023年人均GDP(268200元/QALY)时,与曲妥珠单抗原研药相比,曲妥珠单抗生物仿制药治疗复发或转移性HER-2阳性乳腺癌具有较好的经济性。

基于超声的深度学习模型对乳腺癌HER2表达的预测价值

目的探讨基于超声的深度学习模型,用于术前预测乳腺癌HER2零表达(HER2-Zero)与HER2低表达(HER2-Low)的潜在价值。方法回顾性连续收集2所医院共243例经病理确诊为乳腺癌病人的临床资料和术前超声图像,据其来源医院将病人分为训练集(124例)和验证集(119例)。利用ImageJ软件手动勾画超声图像中的病灶,在训练集中基于3种预训练的基础深度学习模型(VGG16、ResNet50、DenseNet121)构建基于超声的深度学习模型,并选出效能最优者。在训练集中,采用多因素逻辑回归分析筛选与HER2状态相关的临床独立预测因素构建临床模型。将临床独立预测因素与最优的深度学习模型联合来构建综合模型。采用受试者操作特征曲线下面积(AUC)评估各模型的预测效能,并利用校准曲线和决策曲线评估综合模型拟合效果和临床净获益。结果多因素逻辑回归分析显示Ki-67表达状态是乳腺癌HER2状态的临床独立预测因素。3种深度学习模型中,DenseNet121模型效能最优,故以Ki-67及DenseNet121模型联合构建综合模型。在训练集和验证集中,综合模型的预测效能(AUC值分别0.865、0.848)均高于临床模型与3个深度学习模型。校准曲线显示综合模型在2个数据集中均具有较好的拟合效果(Hosmer-Lemeshow检验:P=0.267,0.398),决策曲线显示综合模型具有较宽的临床净获益范围。结论基于超声的深度学习模型在术前预测乳腺癌病人HER2-Zero与HER2-Low表达状态方面有一定价值,能够为临床治疗决策提供依据。

MRI及临床病理特征对乳腺癌人表皮生长因子受体2表达状态的鉴别诊断价值

目的 探讨MRI联合临床病理特征在乳腺癌人表皮生长因子受体2(human epidermal growth factor receptor 2, HER-2表达状态中的鉴别诊断价值,尤其是在HER-2低表达乳腺癌中的鉴别诊断价值。材料与方法 回顾性分析2018年1月至2019年12月在复旦大学附属肿瘤医院经病理证实为乳腺癌的患者治疗前乳腺MRI图像,205例患者均行双侧乳腺平扫及增强MRI检查。根据免疫组织化学和荧光原位杂交结果将HER-2状态分为HER-2阴性(包括零、低表达)和阳性(过表达)。分析各组临床病理特征及MRI特征,临床病理特征包括年龄、月经状态、雌激素受体(estrogen receptor, ER)、孕激素受体(progesterone receptor, PR)、激素受体(hormone receptor, HR)、分子分型和Ki-67水平。MRI特征包括纤维腺体类型、背景实质强化、多灶或多中心、瘤内T2WI高信号、瘤周水肿、病灶类型、病灶大小、肿块形状、边缘、内部强化模式、非肿块强化分布及内部强化模式。单因素分析中,对于HER-2阴、阳性组间比较,年龄采用独立样本t检验,病灶大小采用Mann-Whitney U检验,其余临床病理特征及MRI特征采用χ^(2)检验;对于HER-2零、低和过表达组的比较,年龄采用单因素方差分析,病灶大小采用Kruskal-Wallis H检验;其余临床病理特征及MRI特征采用χ^(2)检验。多因素分析采用二元logistic回归分析,用受试者工作特征曲线下面积(area under the curve, AUC)、敏感度和特异度评价模型的诊断效能。结果 HER-2阴性中零表达59例、低表达79例,HER-2阳性(过表达) 67例。HER-2阴性与阳性组临床病理特征中,ER、PR、HR和分子分型差异有统计学意义(P均<0.001),MRI特征中肿块边缘差异有统计学意义(P=0.020)。进一步比较HER-2低表达组与零表达组、HER-2低表达组与过表达组,临床病理特征中,ER、PR、HR、分子分型和Ki-67水平(以中位数40%为截断值)组间差异具有统计学意义(ER、PR、HR、分子分型:P均<0.001;Ki-67:P<0.001,P=0.037);MRI特征中,瘤内T2WI高信号与肿块形状组间差异具有统计学意义(瘤内T2WI高信号:P=0.031,P=0.011;肿块形状:P=0.012,P=0.025),且肿块边缘在HER-2低表达与零表达组间差异有统计学意义(P=0.036)。联合临床病理和MRI特征的多因素分析提示,PR状态、Ki-67水平及肿块形状是鉴别乳腺癌HER-2低表达与零表达的独立预测因素,AUC、敏感度和特异度分别为0.772、79.7%和70.9%;PR状态及瘤内T2高信号是鉴别HER-2低表达与过表达的独立预测因素,AUC、敏感度、特异度分别为0.793、69.8%和76.1%。结论 MRI影像特征对乳腺癌HER-2表达状态具有鉴别诊断价值,尤其在HER-2低表达与零表达或过表达乳腺癌鉴别诊断中。联合临床病理特征,PR阳性、Ki-67低于40%、肿块形状不规则和瘤内T2WI高信号可提示HER-2低表达乳腺癌。