肺腺癌患者EGFR突变状态与CT影像学及临床特征的关联性研究

目的探讨肺腺癌患者表皮生长因子受体(EGFR)突变状态与CT影像学及临床特征的关联性。方法收集2016-06～2017-12就诊并行EGFR基因检测的149例肺腺癌患者(突变80例,野生型69例)CT影像学及临床资料,比较EGFR突变组与野生型组的CT影像学及临床特征。结果临床特征:女性、无吸烟史、癌胚抗原(CEA)升高的患者EGFR突变率高(P 0. 05)。CT影像学:肿瘤伴有毛刺、胸腔积液的患者EGFR突变率高(P 0. 05)。Logistic回归分析结果提示性别、CEA、毛刺对EGFR突变有预测价值。结论单因素分析结果提示EGFR突变状态与性别、吸烟史、CEA、毛刺及胸腔积液有关联性。Logistic回归分析结果提示女性、CEA升高、毛刺是肺腺癌患者EGFR突变的危险因素。     

CT诊断老年肺癌患者病理亚型与病理学诊断的一致性及其影像学特征

目的 观察多层螺旋(MS)CT诊断老年肺癌患者病理亚型与病理学诊断的一致性及其影像学特征。方法 选取128例老年肺癌患者，以病理学为“金标准”,所有患者接受MSCT检查。分析肺癌不同类型、肺腺癌病理亚型的CT征象特点，采用受试者工作特征(ROC)曲线分析MSCT对肺腺癌的诊断效能。结果 128例老年肺癌患者中小细胞肺癌16例、肺鳞癌20例、肺腺癌92例，其中肺腺癌的血管集束征、毛刺、胸膜凹陷征比例明显高于肺鳞癌(P<0.05)。MSCT诊断肺腺癌的敏感度、特异度、准确度分别为89.13%(82/92)、83.33%(30/36)、87.50%(112/128)。ROC曲线分析显示MSCT诊断肺腺癌的曲线下面积(AUC)为0.862(95%CI 0.782～0.942)。92例肺腺癌患者中腺泡型65例、实体型16例、乳头型3例、微乳头型4例、贴壁型4例。5组分叶征、血管集束征、毛刺、胸膜凹陷征、空洞征比例差异无统计学意义(P>0.05),其中贴壁型病灶≥3 cm比例明显低于其他4组(P<0.05)。结论 不同病理类型老年肺癌患者MSCT表现存在一定差异，MSCT可有效诊...     

EGFR突变状态与肺腺癌新分类中组织学亚型和生存关系

目的本研究选取手术切除的中晚期肺腺癌中常见病理亚型,通过检测EGFR突变状态探讨其对患者生存时间的影响。方法收集我院胸外科经手术切除的Ⅱa-Ⅲa期肺腺癌患者生存资料,通过检测肺腺癌EGFR基因,比较EGFR基因突变阳性与EGFR突变基因阴性(野生型)患者的2年无疾病生存率(DFS)和5年总生存率(OS),分析比较EGFR突变状态对患者生存的影响。结果在120例肺腺癌患者中EGFR基因突变率为46.6%,最常见的突变位点是外显子19(44.6%)和外显子21(42.8%),在所有浸润性肺腺癌组织学类型中,最常见的组织学类型是腺泡为主型(55.8%),其次是伏壁为主型(25.8%),两种组织学类型中的EGFR突变阳性率为(腺泡型61.2%VS伏壁为主型44.7%),EGFR野生型(腺泡型55.3%VS伏壁型33.8%),两者组织学亚型中EGFR突变率差异无统计学意义(P=0.192)。通过比较生存时间分析得出,肺腺癌2年无疾病生存率(EGFR突变阳性55.3%VS EGFR突变野生型55.6%,P=0.367),5年总生存率(EGFR突变阳性55.5%VS EGFR突变野生型40.6%,P=0.143),差异均无统计学意义。结论在手术切除的中晚期肺腺癌患者中,EGFR突变状态本身不是影响肺腺癌术后生存时间的因素。     

肺腺癌患者EGFR突变与TTF-1的关系及意义研究

目的分析肺腺癌患者EGFR突变与TTF-1及患者临床相关因素的相关性。方法对247例肺腺癌组织标本进行TTF-1及EGFR检测,分析两者间的相关性及临床意义。结果肺腺癌EGFR突变97例(39.27%),其中19外显子缺失突变27例(10.93%),21外显子点突变70例(28.34%);EGFR突变者均为TTF-1染色阳性,而TTF-1阴性或部分阳性者无1例有EGFR突变,EGFR突变与TTF-1表达具有明显相关性(P=0.0057);TTF-1阳性、女性、不吸烟、血清CEA异常(≥5 ng/ml),肿瘤远处转移患者EGFR突变率较高。结论肺腺癌患者EGFR突变与TTF-1呈明显正相关性,TTF-1表达情况在一定程度上可预测肺腺癌EGFR突变状况,为临床治疗决策提供有意义的线索。     

肺腺癌EGFR基因19、21外显子突变与临床病理特征及预后的关系

目的分析肺腺癌表皮生长因子受体(EGFR)基因19、21外显子突变与临床病理特征及预后的关系。 方法回顾性分析2017年1月至2018年6月100例经病理证实为肺腺癌的患者临床资料与标本,采用PCR-ARMS技术检测标本EGFR基因19、21外显子突变情况,分析EGFR基因突变与临床病理特征及预后的关系。 结果100例肺腺癌标本共检测出47例EGFR突变,突变率为47.00%,其中第19号外显子突变20例(42.55%),包括6种形式的突变,以核苷酸框架缺失为主,最常见的类型为核苷酸从2234-2248位缺失15bp的delE746-A750突变,共11例,占55.00%;第21号外显子突变27例(57.45%),包括5种形式的突变,均是碱基置换突变,最常见的类型为2573位点的T被G取代的L858R,共17例,占62.96%;女性、无吸烟史、临床分期Ⅰ期患者EGFR19与EGFR21突变率高于其他患者(P<0.05);Logisitic回归分析显示性别、吸烟史、肿瘤直径、临床病理分期是影响EGFR19、EGFR21突变的因素。100例肺腺癌患者全部获得有效随访,EGFR19突变患者2年无进展生存率、总生存率分别为80.00%、85.00%,未突变患者分别为65.00%、73.75%;EGFR21突变患者2年无进展生存率、总生存率分别为81.48%、92.59%,未突变患者分别为63.01%、69.86%;女性、临床分期较早、无淋巴结转移、发生EGFR21突变患者2年生存率低于其他患者(P<0.05);Logisitic回归分析显示男性、临床分期较晚、有淋巴结转移、EGFR21未突变是肺腺癌患者不良预后的独立危险因素。 结论肺腺癌EGFR基因19、21外显子突变与性别、吸烟史、肿瘤直径、临床分期有关,同时也是预测预后的有效方法。     

直径小于等于3cm的肺腺癌临床病理特点分析及临床实践

目的探讨直径≤3 cm的肺腺癌的临床病理学特点。方法收集整理北京协和医院收治的直径≤3 cm手术切除的肺腺癌标本202例,按照2011年国际多学科分类和2015年WHO肺肿瘤组织学分类对其组织学形态进行评估。结果 202例肿瘤最大径≤3 cm的肺腺癌患者中,女性130例,男性72例,年龄33~81岁,平均年龄59.9岁。组织学观察发现:满足原位腺癌诊断的17例(8.4%),微小侵袭性腺癌为10例(5.0%),该两组女性患者较多(19/27,70.4%),大部分患者均无吸烟史(22/27,81.5%),肿瘤体积偏小,几乎所有病例中均未见胸膜侵犯、支气管侵犯及淋巴结转移。最大直径≤3 cm的侵袭性肺腺癌175例(86.6%),其中非黏液贴壁生长为主型53例(26.2%),与原位腺癌及微小侵袭性腺癌不同,非黏液贴壁生长为主型的少数患者存在胸膜侵犯和/或支气管侵犯及淋巴结转移;另侵袭性肺腺癌的其他亚型122例(60.4%),包括腺泡为主型、乳头为主型、实性为主型、微乳头为主型。这些亚型通常肿瘤体积较大,胸膜侵犯和/或支气管侵犯以及淋巴结转移率明显高于非黏液贴壁生长为主型,其总体预后较后者差。结论对202例肿瘤最大直径≤3 cm的肺腺癌,按照最新分类标准分析讨论了原位腺癌、微小侵袭性腺癌、侵袭性腺癌,非黏液贴壁生长为主型以及侵袭性腺癌的其他亚型的临床病理特征,有助于病理医生及外科医生更好的认识及理解其特点。     

肺腺癌中PD-L1、B7H3的表达与EGFR基因突变的关系

目的探讨程序性凋亡配体1(programmed death-ligand 1,PD-L1)、B7H3在肺腺癌中的表达与表皮生长因子受体(epidermal growth factor receptor,EGFR)基因突变状况的关系,为EGFR基因突变的肺腺癌患者提供一种新的临床治疗方法。方法收集78例手术切除的肺腺癌组织,所有标本均有EGFR基因检测结果。应用免疫组织化学PV-6 000法检测PD-L1、B7H3的表达情况。结果肺腺癌组织中有32例(41.0%)发生EGFR突变,其中女性的突变率高于男性(30.8%vs 10.3%,P0.05),不吸烟者比吸烟者有更高的突变率(28.2%vs12.8%,P0.05)。PD-L1、B7H3在EGFR突变型患者中的阳性率分别为71.9%、68.8%,均高于其在野生型患者中的发生率45.7%、43.5%(P0.05),且均与21外显子突变密切相关(P0.05),但未发现与19外显子突变相关(P0.05)。PD-L1在女性、不吸烟者及II~III期中的表达水平高于男性、吸烟者及I期患者(P0.05)。B7H3的表达与TNM分期及淋巴结转移情况相关(P0.05)。PD-L1与B7H3表达呈正相关关系(P0.05)。结论 PD-L1、B7H3高表达在EGFR突变型肺腺癌的发生发展中起重要作用,以PD-L1、B7H3为靶点的免疫治疗,可能成为这部分患者治疗的新方法。     

肺腺癌患者肿瘤标志物与EGFR基因突变的初步研究

目的探讨肺腺癌患者肿瘤标志物与表皮生长因子受体(EGFR)突变的关系。方法本研究为病例对照研究。采用非随机抽样方法选取2010年12月至2019年7月新疆医科大学第一附属医院收治并外科手术病理确诊肺腺癌的166例患者, 按基因突变分为EGFR突变组76例和EGFR未突变组90例。分析2组性别、年龄、吸烟、肿瘤家族史、临床TNM分期、远处器官和淋巴结转移等临床特征;比较不同性别的突变位点的差别, EGFR突变组和EGFR未突变组肿瘤标志物的差别。比较各突变位点肿瘤标志物细胞角蛋白19片段、鳞状上皮细胞癌抗原、癌胚抗原(CEA)、糖类抗原125、糖类抗原199、糖类抗原153(CA153)的差异。绘制受试者工作特征曲线, logistic回归分析EGFR突变的影响因素。结果 166例肺腺癌中, 76例发生EGFR突变, 突变率为45.78%(76/166), 女性较男性突变率高[52.74%(48/91)比37.33%(28/75), χ²=3.94, P=0.047]。其中突变最多的是19外显子35.53%(27/76), 其次为21外显子31.58%(24/76)。男女各突变位点比率差异无统计学意义(χ²值分别为0.22、0.35、0.11、0.04, P值均>0.05)。EGFR突变组较EGFR未突变组肿瘤标志物CEA和CA153检出率高(Z值分别为2.07、2.51, P值均<0.05), 各基因位点之间CEA和CA153检出率差异无统计学意义(χ²值分别为3.22和2.85, P值均>0.05)。受试者工作特征曲线中, CEA、CA153联合检测预测EGFR突变的曲线下面积为0.638。logistic回归分析显示, 性别、肿瘤标志物中CA153是预测EGFR突变的危险因素。结论肺腺癌女性更容易发生EGFR突变, CA153检出率高是EGFR突变的预测指标。     

非小细胞肺癌EGFR基因突变检测与临床意义

目的 探索铜陵地区非小细胞肺癌表皮生长因子受体(EGFR)基因突变与其临床病理特征的关系.方法 用蝎形探针扩增阻滞突变系统对非小细胞肺癌患者石蜡包埋组织、冷冻组织进行EGFR基因18～21外显子突变的检测,分析EGFR基因的突变的分布特征及其与临床病理特征的相关性.结果 42份非小细胞肺癌标本中24份检测出EGFR基因突变,总检出率57.14％.突变类型主要包括L858R点突变(41.67％)、19-del E746-A450缺失突变(41.67％)、L858R+ 19-del(12.50％)、G719X点突变(4.17％).未检测出第20外显子T790M点突变.女性患者突变率(75.00％)较男性患者突变率(40.91％)高,二者差异有统计学意义(P=0.026);吸烟＜400年支突变率为70.37％,较吸烟≥400年支突变率(33.33％)高,差异有统计学意义(P=0.02);肿瘤病理学类型为腺癌突变率为60.61％(20/33),而鳞癌突变率为40.00％ (2/5),二者差异无统计学意义(P=0.346).年龄＜60岁患者突变率为64.00％,较≥60岁患者突变率(47.06％)高,差异无统计学意义(P=0.276).不同TNM分期之间突变率差异无统计学意义(P=0.9).结论 EGFR基因突变多见于女性、不吸烟或少吸烟非小细胞肺癌患者.     

非小细胞肺癌表皮生长因子受体突变的检测与分子靶向治疗

目的探讨非小细胞肺癌患者表皮生长因子受体(EGFR)基因突变率和突变类型,分析其临床特征,并观察EGFR突变与表皮生长因子受体酪氨酸激酶抑制剂(EGFR-TKIs)治疗疗效的相关性。方法收集203例非小细胞肺癌患者外科手术、淋巴结活检、经皮肺穿刺活检、气管镜活检和胸腔积液沉渣石蜡标本,应用ADx-ARMS法进行EGFR基因突变检测,分析基因的突变率及其与临床特征的关系;观察非小细胞肺癌(NSCLC)接受EGFR-TKIs治疗的非小细胞肺癌患者的疗效。应用SPSS23.0软件进行统计学分析,计数资料比较采用χ2检验,采用Kaplan-Meier法计算患者的PFS,采用Log-Rank检验分析各种因素对生存期的影响。结果 203例NSCLC患者,男性116例,女性87例,年龄为25~82岁。吸烟指数≥400支/者61例,小于400支/年和不吸烟者142例,腺癌152例,鳞癌21例,腺鳞癌14例,其他NSCLC16例。203例NSCLC患者EGFR总突变率为51.2%(104/203),包括19外显子缺失突变51例(49.0%),21外显子L858R突变44例(42.3%),19del及L858R总突变率占所有突变的96.1%,18外显子G719X点突变3例(2.9%),19del+L858R双突变3例(2.9%),1例20ins,2例T790M突变分别为1例19del+T790M和1例L858R+T790M。EGFR基因阳性突变率女性组高于男性组(66.7%vs.36.2%);非吸烟组高于吸烟组(63.4%vs.16.4%);腺癌组高于鳞癌组(53.3%vs.33.3%),P0.05。而EGFR基因突变状况与标本类型如手术、淋巴结活检、肺穿刺活检、气管镜活检和胸腔积液沉渣标本间无统计学差异,P=0.418。101例接受TKI治疗的NSCLC患者客观缓解率(ORR)为61.4%,疾病控制率(DCR)为71.3%,中位疾病无进展生存期(PFS)为10个月。其中EGFR突变阳性患者接受EGFR-TKIs治疗的ORR及DCR均要显著高于EGFR突变阴性及EGFR突变状态未明确人群(88.6%vs.16.7%vs.43.1%,P=0.000;95.5%vs.16.7%vs.56.9%,P=0.000)。EGFR突变阳性患者接受EGFR-TKIs治疗的中位PFS较EGFR突变阴性及EGFR突变状态未明确患者延长,有统计学差异(P=0.001)。进一步分析EGFR突变阳性19del组NSCLC患者ORR、DCR均高于L858R组(91.2%vs.85%,P=0.646;100%vs.90%,P=0.201);19del组NSCLC患者TKI治疗后中位PFS 14.5个月较L858R组10个月长,有统计学差异(P=0.010)。结论非小细胞肺癌患者EGFR突变高,以女性、不吸烟、腺癌为优势人群,EGFR敏感突变阳性者对EGFR-TKI疗效好,EGFR突变中19del者较L858R疗效更佳,基因检测结果可以较好地预测分子靶向药物的疗效,降低肿瘤进展的风险。     

Clinicopathologic features and prognostic value of epidermal growth factor receptor mutation in patients with pT1a and pT1b invasive lung adenocarcinoma after surgical resection

BackgroundPrevious studies have evaluated the prognostic value of epidermal growth factor receptor (EGFR) mutation in different subgroups of lung adenocarcinoma, but there remains controversial on this issue. We conduct this study aimed to reveal the prognostic value of EGFR mutation in patients with pT1a and pT1b invasive lung adenocarcinoma.MethodsFrom August 2009 to February 2015, 338 patients with pT1a and pT1b invasive lung adenocarcinoma who underwent EGFR mutation analysis were enrolled into this study. According to clinicopathologic and radiologic characteristics, survival analysis was conducted in different subgroups using Kaplan-Meier methods and Cox regression models.ResultsEGFR mutation was detected in 216 (63.9%) patients. In the entire cohort, EGFR mutation was significantly frequent in female (P=0.011), never smoking (P=0.014) patients, patients with part-solid nodules (P=0.005) and patients with lepidic pattern-predominant adenocarcinoma (LPA)/acinar pattern-predominant adenocarcinoma (APA)/papillary pattern-predominant adenocarcinoma (PPA) (P=0.005). No difference in recurrence-free survival (RFS) was seen between patients harboring EGFR mutation and patients without EGFR mutation in the entire cohort (P=0.664) and the subgroup cohorts. Patients with EGFR mutation had a longer overall survival (OS) compared with patients without EGFR mutation in the entire cohort (P=0.005) and the subgroups of N0 stage cohort (P=0.013), N1–2 stage cohort (P=0.033), APA/PPA/invasive mucinous adenocarcinoma (IMA) cohort (P=0.011) and pT1b cohort (P=0.002). Tyrosine kinase inhibitors (TKIs) could significantly prolong the OS in patients with EGFR mutation after recurrence (P=0.04).ConclusionsEGFR mutation was not a risk factor for recurrence of patients with pT1a and pT1b invasive lung adenocarcinoma.     

High Incidence of EGFR Mutations in Pneumonic-Type Non-Small Cell Lung Cancer

To retrospectively identify computed tomography (CT) features that correlate with epidermal growth factor receptor (EGFR) mutation in surgically resected pneumonic-type lung cancer (P-LC).A total of 953 consecutive patients with surgically resected lung cancer in the First Affiliated Hospital of Guangzhou Medical University from August 2011 to August 2013 were studied. The CT manifestations were reevaluated independently by 2 radiologists. The presence of pneumonic-type consolidation with pathological confirmed non-small lung cancer (NSCLC) was defined as P-LC. EGFR mutation was determined by direct DNA sequencing or amplification refractory mutation system-PCR. EGFR mutation rates as well as clinical and pathological manifestations between P-LC and control lung cancer patients were compared.P-LC was diagnosed in 85 patients. Among these patients, 82 were adenocarcinoma (including 78 cases of invasive adenocarcinoma and 4 cases of microinvasive adenocarcinoma), 2 were squamous carcinoma and 1 was other type. P-LC occurred more frequently in female (58.8% vs 37.1%, P < 0.01), nonsmoking (76.5% vs 56.5%, P = 0.001) and adenocarcinoma (58.8% vs 37.1%, P < 0.01) patients. Moreover, EGFR mutations were found in 39 of 52 P-LC patients (75%) and 263 of 542 non-P-LC NSCLC patients (48.5%). However, no difference was found on the mutation sites of EGFR. Histological type, sex, and radiological manifestations (P-LC vs non-P-LC) but not smoking or sequencing method can be served as the independent predictor of EGFR mutations.P-LC patients showed a significant higher incidence of EGFR mutations, which was independent of sex, histological type, and smoking history. The patients with imaging manifestation of pneumonic-type consolidation are highly suggested to perform EGFR mutation analysis to guide the sequential treatment.     

非小细胞肺癌患者EGFR突变率及与临床病理关系和TKI靶向治疗效果

目的探讨非小细胞肺癌(NSCLC)患者表皮生长因子受体(EGFR)突变率及与临床病理关系和酪氨酸酶抑制剂(TKI)靶向治疗效果。 方法选取2014年5月至2016年8月我院收治的NSCLC患者100例为研究对象,采用聚合酶链反应-直接测序法检测患者肿瘤组织EGFR基因18-21号外显子突变情况,分析EGFR突变与临床病理的关系及其突变特点,比较EGFR突变型与野生型采用TKI靶向治疗的疗效及1年生存率、2年生存率。 结果本次纳入的100例NSCLC患者中共44例发生EGFR突变,EGFR突变率为44.00%;NSCLC患者EGFR突变率特点：女性高于男性,吸烟患者高于不吸烟患者,腺癌高于非腺癌,差异对比均有统计学意义(P<0.05);Logistic回归分析显示性别为女性、病理类型为腺癌是导致NSCLC患者发生EGFR突变的独立危险因素(P<0.05);EGFR突变类型包括18号外显子点突变4.54%(2/44)、19号外显子缺失突变43.19%(19/44)、20号外显子插入突变及点突变11.36%(5/44)、21号外显子点突变40.91%(18/44);EGFR突变型患者TKI治疗有效率68.18%明显高于EGFR野生型10.71%(P<0.05);EGFR突变型与野生型患者1年、2年生存率对比差异无统计学意义(P>0.05)。 结论性别、病理类型是导致NSCLC患者发生EGFR基因突变的独立危险因素,对于EGFR突变型患者采用TKI靶向治疗可获得较好疗效,但2年生存率与EGFR野生型患者尚无明显差异。     

吉非替尼对EGFR基因突变型晚期肺癌患者的影响

目的探讨聚合酶链反应-单链构象多态性（PCR-SSCP）技术检测晚期肺癌患者表皮生长因子受体（EGFR）基因突变的敏感性,观察靶向性药物吉非替尼对EGFR基因突变型肺癌患者的临床疗效。方法从54例晚期肺癌患者的肿瘤组织中提取DNA,用PCR—SSCP技术检测其EGFR基因突变情况;并对EGFR基因突变患者进行吉非替尼靶向治疗。结果肺癌组织中检出EGFR基因突变28例,突变率为51．9％;EGFR基因突变多见于女性和肺腺癌患者。28例EGFR基因突变型患者行吉非替尼治疗后的客观有效率为53．6％,病情控制率为92．9％;其生存率1a以上57．1％,2a以上28．6％,3a以上14．3％。结论PCR-SSCP检测肺癌EGFR基因突变具有高度敏感性,以其EGFR基因突变结果为依据对晚期肺癌患者选用靶向治疗,有明显疗效。     

Epidermal growth factor receptor mutations in small cell lung cancer patients who received surgical resection in China

To know the incidence of epidermal growth factor receptor (EGFR) mutations in small cell lung cancer (SCLC) patients who received surgical resection in mainland China. xTAG technology was used to detect the EGFR exon 19 and exon 21 mutations of 40 patients with SCLC who received surgical treatment in Zhejiang Cancer Hospital from 1998 to 2010. 2 of 40 cases were found with mutations in exon 19 of the EGFR gene. The mutation in exon 19 of the EGFR gene is in a female and non smoking patient which pathology is SCLC combined adenocarcinoma, and the other is male and smoking patient which pathology is SCLC combined squamous cell carcinoma. The EGFR mutation is rare in SCLC patients, and EGFR mutation might occur more often in combined SCLCs than conventional patients.     

Risk of adenocarcinoma in patients with a suspicious ground-glass opacity: a retrospective review

BackgroundBoth primary lung adenocarcinoma and benign processes can have a ground-glass opacity (GGO) appearance on imaging. This study evaluated the incidence of and risk factors for malignancy in a diverse cohort of patients who underwent resection of a GGO suspicious for lung cancer.MethodsAll patients who underwent resection of a pulmonary nodule with a GGO component and suspected to be primary lung cancer at a single institution from 2001–2017 were retrospectively reviewed. Risk factors for malignancy were evaluated using multivariable logistic regression analysis that included nodule size, age, sex, and race as potential predictors.ResultsThe incidence of pulmonary adenocarcinoma in the 243 patients who met inclusion criteria was 86% (n=208). The most common pathologic findings in 35 patients with a benign pathology was granulomatous inflammation (n=14, 40%). Risk factors for adenocarcinoma in multivariable logistic regression were age [odds ratio (OR) 1.06, P=0.003], GGO size (OR 2.76, P<0.001), female sex (OR 4.47, P=0.002), and Asian race (OR 8.35, P=0.002). In this cohort, adenocarcinoma was found in 100% (44/44) of Asian females, 86% (25/29) of Asian males, 84% (98/117) of non-Asian females, and 77% (41/53) of non-Asian males.ConclusionsThe likelihood of adenocarcinoma in lung nodules with a ground-glass component is influenced by sex and race. Asian females with a GGO have a much higher likelihood of having adenocarcinoma than men and non-Asians. This data can be used when deciding whether to pursue nodule resection or surveillance in a patient with a GGO.     

Solid predominant histology predicts EGFR tyrosine kinase inhibitor response in patients with EGFR mutation-positive lung adenocarcinoma

Background

The efficacy of epidermal growth factor receptor (EGFR) tyrosine kinase inhibitors (TKIs) differs in patients with lung adenocarcinoma harboring EGFR-activating mutations. Although lung adenocarcinoma with EGFR-activating mutations has heterogeneous morphologic features, the predictive role of histologic subtype of lung adenocarcinoma with regard to the effectiveness of EGFR-TKIs in patients with EGFR-activating mutations has not been well defined.

Methods

Among 134 postoperative recurrence patients with lung adenocarcinoma harboring EGFR-activating mutation (L858R or exon 19 deletion) treated with EGFR-TKIs, we retrospectively analyzed 61 patients treated with EGFR-TKIs as first-line chemotherapy. All the tumors were classified according to the new histologic classification proposed by the International Association for the Study of Lung Cancer (IASLC), American Thoracic Society (ATS), and European Respiratory Society (ERS) into the following subtypes: lepidic, papillary, acinar, micropapillary, or solid predominant subtype. We evaluated the correlation between the histologic subtype and the clinical efficacy of EGFR-TKIs.

Results

In overall response rate, adenocarcinoma with solid predominant subtype is significantly worse than with non-solid predominant subtype (61 vs. 88 %, P = 0.03). The median progression-free survival (PFS) and overall survival after EGFR-TKI treatment were significantly shorter for the patients with solid predominant subtype than for those with non-solid predominant subtype (median PFS of 7.7 vs. 13.5 months, P = 0.002, and median OS of 21.5 vs. 31.0 months, P = 0.028).

Conclusions

This study indicated that among patients with lung adenocarcinoma harboring activating EGFR mutations treated with EGFR-TKIs, solid predominant subtype according to IASLC/ATS/ERS classification is a response predictor for EGFR-TKI.