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Table of Contents

    Topic review

    TKIs for NSCLC patients

    Subjects: Oncology
    View times: 4
    Submitted by: Abed Agbarya


    Lung cancer is the most common malignancy across the world. The new era in lung cancer treatments, especially this past decade, has yielded novel categories of targeted therapy for specific mutations and adjuvant therapy, both of which have led to improved survival rates. 

    1. Introduction

    Lung cancer is the leading cause of cancer-related deaths in the United States and poses a significant health care concern throughout the world [1]. Over 68% of patients are diagnosed after the age of 65 whereas less than 3% are diagnosed under the age of 45 years [2]. Non-small cell lung cancer (NSCLC) has the highest incidence of 85% among all lung cancers [3]. NSCLC includes any type of epithelial lung cancer apart from small-cell lung cancer and so is divided histologically into adenocarcinoma, squamous cell carcinoma (SCC), and large cell carcinoma [4]. As NSCLC is often insidious, patients can present with no symptoms until the disease is advanced, contributing to the poor prognosis of lung carcinoma [5]. Nearly 30% of patients with NSCLC have localized disease (stage I–IIIA) at the time of diagnosis and undergo curative surgery. Despite full tumor resection, many patients will experience systemic and/or local relapses, thereby succumbing to the disease. It is important to recognize that staging holds significance as to whether the tumor can be resected. Stages I and II are localized disease that can be resected without fear of the tumor having already metastasized whereas in stages IIIB and IV, resection is unfeasible. Stage IIIA is unique in that T3N0M0 is resectable whereas T3N2M0 is unresectable. Indeed, staging plays a role in determining the magnitude of the impact of the drug as a therapeutic. Several adjuvant therapies, including tyrosine kinase inhibitors (TKIs), chemotherapy, and immunotherapy, have been investigated as a means of improving survival outcomes for patients with fully resected NSCLC [6]. Currently, there is no consensus regarding optimal chemotherapy regimens for adjuvant treatment, especially when considering the added detail of specific tumor mutations. Clinical practice involves the combination of pharmaceutical agents such as cisplatin and second-generation chemotherapy drugs. Furthermore, the National Comprehensive Cancer Network guidelines lists options of chemotherapy regimens using cisplatin or carboplatin along with another drug, e.g., vinorelbine. Combinations of cisplatin with either etoposide (VP-16), gemcitabine, docetaxel, or pemetrexed (for adenocarcinoma) were also mentioned [7]. The most recent findings show that the combination of cisplatin plus vinorelbine is probably the best choice for adjuvant treatment [8][9].
    Epidermal growth factor receptor (EGFR), also known as HER1, is a 170-kDa transmembrane receptor tyrosine kinase (RTK) found on the surface of epithelial cells and often overexpressed in malignancy [10]. Alterations in the EGFR gene have been found to be involved in cancer cell growth and tumor vascularization. EGFR mutations have been identified in up to 20% of all lung adenocarcinomas and there is a higher prevalence among females and non-smokers [11]. Patients with EGFR-mutant lung adenocarcinomas have a 70% response rate to first-line EGFR-TKI therapy, such as erlotinib, gefitinib, or afatinib [12]. TKI were previously used as supportive therapy for patients with NSCLC and, as shown in the chronological layout of the trials presented here, have since been used as monotherapy. There are five TKI currently available for the treatment of NSCLC in patients with EGFR-mutations, which are divided into three generations. The first generation includes erlotinib and gefitinib, the second generation dacomitinib and afatinib, and the third generation osimertinib. However, only osimertinib has been approved as adjuvant treatment for EGFR mutations in NSCLC [13]. Several clinical trials have shown improved efficacy, better outcomes in progression-free survival (PFS) and/or overall survival (OS) for several generations of TKI as compared to patients with EGFR-mutant lung adenocarcinoma who received chemotherapy as adjuvant treatment [14][15][16][17]. Additionally, these trials showed longer OS for patients with EGFR mutations compared to EGFR-wild type during the incidence of brain metastasis (patients were in stage I–III before brain metastasis) [18]. Given that there is propensity to acquired resistance, there is great need for continued advancements in therapeutic innovation, both in discovery and appropriate combinations.
    NSCLC two-year survival rates have increased from 34% for diagnoses made in 2009–2010 to 42% for diagnoses made in 2015–2016 [3]. The new era of oncology treatments has included novel adjuvant therapy such as TKI in EGFR-mutant NSCLC. In this review paper we examine past, present and future therapies that have shown treatment efficacy for NSCLC patients with resected EGFR mutations such as those in exon 19 or 21 or the L858R substitution (Table 1).
    Table 1. Reviewed clinical trials of adjuvant therapy for past trials that were uncharacterized for EGFR, past and present trials involving TKI with or without chemotherapy in completely resected EGFR-mutated NSCLC.
    Treatment Chemotherapy Uncharacterized for EGFR-TKI (n = 7) TKI with or without
    (n = 5)
    TKI a
    (n = 3)
    Trial Name b ALPI [18]
    IALT [19]
    BLT [20]
    CALGB 9633 [21]
    JBR-10 [22]
    ANITA [23]
    MAGRIT [24]
    Pemtrexed + carboplatin + gefitinib [25]
    EVAN [26]
    ADJUVANT [15]
    SELECT [16]
    ADAURA [14]
    ALCHEMIST [27]
    EMERGING [28]
    Afatinib [29]

    2. EGFR-TKI Used in Clinical Trials for NSCLC Adjuvant Therapy

    2.1. Erlotinib

    Erlotinib is a derivative of quinazoline classified as an antineoplastic agent. It is a first generation TKI medication treatment for NSCLC tumors with EGFR mutations, exon 19 deletion (ex19del), or exon 21 point mutation (L858R). Erlotinib exerts its antagonist ability by competing with adenosine triphosphate (ATP) on the catalytic site of the EGFR located at the intracellular part [30]. Through reversible binding, erlotinib inhibits the phosphorylation of EGFR, thus disabling the signal transduction pathway and blocking proliferative cellular reactions leading to reduced carcinogenesis process related to activation of EGFR. This targeted therapy drug is orally administered. The Food & Drug Administration (FDA) approved erlotinib for NSCLC on 18 November 2004 and has, since 18 October 2016, restricted its use in lung cancer as a first line treatment to metastatic NSCLC with the EGFR mutations listed above. It remains first-line treatment for locally advanced, unresectable, or metastatic pancreatic cancer when combined with gemcitabine [31].

    2.2. Gefitinib

    Gefitinib is an anilinoquinazoline compound possessing antineoplastic properties. This drug belongs to first generation therapy of TKI NSCLC harboring EGFR exon 19 or exon 21 (L858R) mutation. Gefitinib specifically inhibits the catalytic activity of several tyrosine kinases among them EGFR. It is considered as an antagonist of EGFR and could cause an inhibition of tyrosine kinase-dependent tumor growth [25]. The drug is able to bind in a competitive way to the ATP domain of the tyrosine kinase part on EGFR, hence blocking the autophosphorylation of the receptor, and as a consequence inhibiting the signal transduction downstream cellular mechanism. Gefitinib actions include the induction of cell cycle arrest and restricting angiogenesis. It is given through oral administration. The FDA approved gefitinib for advanced NSCLC progressing beyond platinum doublet chemotherapy and docetaxel on 5 May 2003 and, since 13 July 2015, it has been expanded for use as a first line treatment in metastatic NSCLC with the EGFR mutations listed above [26].

    2.3. Osimertinib

    Osimertinib is a third generation EGFR inhibitor which can selectively bind in an irreversible way. It is indicated for patients suffering NSCLC as an antagonist agent with antitumoral capability. This TKI binds covalently to mutated EGFR in exon 19, exon 21 L858R, as well as to exon 20 T790M. Therefore, it may prevent cell signaling cascade mediated by EGFR activation [27]. Osimertinib potentially may inhibit neoplasm growth in EGFR-overexpressing tumor cells and induce cell death. This medication is orally available. Approval for osimertinib by the FDA came first on 13 November 2015 for use as adjuvant therapy after tumor resection in adult patients with NSCLC with the above EGFR mutations, but this was expanded on 18 April 2018 for use as a first line therapy in metastatic NSCLC with the EGFR mutations listed above [28].

    3. Past Clinical Trials That Included Adjuvant Therapy Using EGFR-TKI in Patients with Completely Resected EGFR Mutated NSCLC

    3.1. Pemetrexed-Carboplatin Adjuvant Chemotherapy with/without Gefitinib Trial

    In this phase II study, 60 patients with resected NSCLC bearing EGFR mutations, exon 19 deletion or L858R, were enrolled [29]. Participants with stage IIIA were randomized to a combination of pemetrexed and carboplatin, for four cycles, followed with or without gefitinib for six months. The results showed longer PFS among those who received chemotherapy + gefitinib (median, 39.8 months) than among those who received only chemotherapy (27.0 months)(HR, 0.369; 95% CI, 0.161–0.847; p = 0.014). Two-year DFS rate was 78.9% in the AC treatment group with TKI vs. 54.2% without TKI. Two-year OS was 92.4% in the AC treatment arm with TKI vs. 77.4% in control arm without TKI (HR, 0.37; 95% CI 0.12–1.11, p = 0.076). OS was also longer for chemotherapy + gefitinib arm (median, 41.6 months) than chemotherapy alone (32.6 months, p = 0.066) (Table 2).
    Table 2. Past clinical trials that included adjuvant therapy using EGFR-TKI in patients with completely resected EGFR mutated * NSCLC.
    Outcome: 2-Year Median DFS TKI Duration Control Arm Treatment Arm NSCLC Stage * Participants (n) Publication Date Trial
    78.9% (95% CI N/A) in AC with TKI
    vs. 54.2% (95% CI N/A) in AC without TKI
    (p value N/A)
    6 months Pemetrexed + carboplatin Pemetrexed + carboplatin followed with gefitinib IIIA 60 2014 March Pemetrexed + carboplatin AC with or without gefitinib
    (Phase II)
    81.4% (95% CI 69.6–93.1) in erlotinib arm
    vs 44.6% (95% CI 26.9–62.4) in chemotherapy arm
    (p = 0.0054)
    2 years (median) Vinorelbine + cisplatin Erlotinib IIIA 102 2018 August EVAN
    (Phase II)
    28.7 months with TKI (95% CI, 24.94–32.46)
    vs. 18 months with chemotherapy combination (95% CI, 13.59–22.34)
    (p = 0.005)
    2 years Vinorelbine + cisplatin Gefitinib II to IIIA 222 2017 November ADJUVANT -CTONG1104 (Phase III)
    88% in erlotinib arm (95% CI N/A) 2 years   Erlotinib (single arm, after AC) IA to IIIA 100 2018 November SELECT (Phase II)
    89% (95% CI, 85–92) in osimertinib arm
    vs 52% (95% CI, 46–58) in placebo arm
    (p value N/A)
    3 years Placebo Osimertinib IB to IIIA 682 2020 September ADAURA (Phase III)

    3.2. EVAN

    Briefly, 102 patients with resected NSCLC harboring EGFR exon 19 deletion or L858R mutation were recruited [32]. Patients diagnosed at stage IIIA were randomized to a combination of vinorelbine and cisplatin, for four cycles vs. erlotinib (until disease progression). The results showed two-year DFS of 81.4% (95% CI 69.6–93.1) in the erlotinib arm and 44.6% (95% CI 26.9–62.4) in the chemotherapy arm (relative risk 1.823 95% CI 1.194–2.784; p = 0.0054) (Table 2).

    3.3. ADJUVANT Trial (CTONG 1104)

    This phase III study enrolled 222 patients with EGFR confirmed mutations (exon 19 deletion or L858R) in resected NSCLC [16]. Patients with stage II to IIIA were randomized to receive gefitinib or a combination of vinorelbine and cisplatin, for four cycles vs. gefitinib for two years. The results showed prolonged two-year median DFS of 28.7 months with TKI (95% CI, 24.94–32.46) vs. 18 months with chemotherapy combination (95% CI, 13.59–22.34), HR,0.60, (95% CI, 0.42–0.87, p = 0.005). No significant differences were found for the analysis of OS final results [16] (Table 2).

    3.4. SELECT Trial

    Briefly, 100 patients with resected NSCLC bearing mutant EGFR, were recruited to this study [17]. Participants diagnosed with stage IB to IIIA, after AC with or without radiotherapy, were randomized to a single arm of erlotinib for up to two years. The results showed two-year course was achieved in 69% of patients. DFS at two years was 88%. Patients’ median follow-up was 5.2 years. At five years, DFS was 56% (95% CI, 45–66%) and OS was 86% (95% CI, 77–92%). Recurrence of the disease was found in four patients while receiving therapy with erlotinib, and in 36 patients who concluded erlotinib treatment, having 25 months as median time to recurrence. Retreatment with erlotinib in 65% of the recurrent patients had a 13-month median duration (Table 2).

    3.5. ADAURA Trial

    In this phase III study, 682 patients with resected NSCLC, carrying EGFR-mutation (Ex19del or L858R) were recruited [14]. Participants with stage IB to IIIA after AC were randomized to osimertinib vs. placebo for three years. Results showed 89% of patients were disease-free (95% CI, 85–92) in the osimertinib arm and 52% (95% CI, 46–58) in the placebo arm at two years. Overall HR for disease recurrence or death of 0.20 (99.12% CI, 0.14–0.30; p < 0.001) can be translated into 80% lower risk for disease recurrence or death, thereby extending DFS in osimertinib arm vs. placebo. Furthermore, results were significant in showing that, at 24 months, 98% of the patients were alive without central nervous system (CNS) disease after receiving osimertinib vs. 85% of patients who received placebo. Overall HR for CNS disease recurrence or death, 0.18; (95% CI, 0.10–0.33) means that 82% decreased risk of CNS disease recurrence or death in the osimertinib arm (Table 2).
    Adverse events reported in the clinical trials involving adjuvant therapy using EGFR-TKI in patients with completely resected NSCLC harboring EGFR-mutations are summarized in Table 3.
    Table 3. Adverse Events reported for clinical trials that included adjuvant therapy using EGFR-TKI in patients with completely resected EGFR mutated NSCLC.
    Adverse Events
    Control Arm
    Adverse Events
    TKI Arm
    NR Approximately 43% of the patients who received both AC and gefitinib developed a rash Pemetrexed-carboplatin adjuvant chemotherapy with/without gefitinib (Phase II)
    Grade ≥ 3, in 11% of patients
    decreased neutrophil count 16% of patients.
    Myelosuppression: 9% of patients.
    Grade ≥ 3, in 12% of patients
    Rash in 4% of patients.
    EVAN (Phase II)
    Grade ≥ 3
    Neutropenia in 34% of patients
    Leucopenia in 16% of patients
    Vomiting in 8% of patients.
    Serious AE in 23% of patients
    Grade ≥ 3: 2% of patients with elevated alanine aminotransferase and 2% of patients with elevated aspartate aminotransferase Serious AE in 7% of patients ADJUVANT—CTONG1104 (Phase III)
    Not relevant No grade 4 or 5 AE.
    Grades 1–3A: rash, diarrhea, dry skin, fatigue, nausea/vomiting, nail changes, pruritis, stomatitis, and transaminitis.
    Recurrence occurred in 40% of patients
    40% of patients required dose reduction of erlotinib, while 16% of patients required second dose reduction
    SELECT (Phase II)
    89% of patients reported AE
    Grade ≥3 AE reported in 13% of patients
    Grade ≥3 AE reported in 20% of patients: diarrhea, paronychia, stomatitis, upper respiratory tract infection and decreased appetite.
    98% of patients reported AE
    Interstitial lung disease in 3% of patients
    ADAURA (Phase III)

    4. Ongoing Clinical Trials That Include Adjuvant Therapy Using EGFR-TKI in Patients with Completely Resected EGFR Mutated NSCLC

    4.1. Adjuvant Lung Cancer Enrichment Marker Identification and Sequencing Trial (ALCHEMIST Trial)

    In this phase III study, 450 patients with resected NSCLC are estimated to be enrolled [33]. Inclusion criteria are diagnosis of stage IB to IIIA with confirmed EGFR exon 19 or L858R mutations. Participants are randomized to two pairs of blinded and unblinded arms to erlotinib vs. placebo for up to two years. The primary objective of the trial is to examine if adjuvant therapy with erlotinib has an improved OS while secondary objectives consider better DFS, the safety profile of erlotinib, and the use of circulating EGFR mutations in cell-free plasma DNA as a prognostic marker. After treatment, patients will be followed up every six months for four years and then once a year for the next six years. Study outcomes are anticipated to be released on October 2026 (Table 6).
    Table 4. Ongoing clinical trials that include adjuvant therapy with EGFR-TKI in patients with completely resected EGFR mutated NSCLC.
    Estimated Study Completion Date Study Start Date TKI Duration (years) EGFR Mutation Control Arms TKI Arms NSCLC Stage Estimated Enrollment (n) Trial
    October 2026 August 2014 2 In exon 19 or L858R confirmed for all patients Placebo Erlotinib IB to IIIA 450 ALCHEMIST [A081105]
    (Phase III)
    December 2022 April 2011 1 In Exon 19 or 21 Gemcitabine/cisplatin
    (2 cycles) as neoadjuvant and adjuvant (2 cycles)
    Erlotinib as neoadjuvant (42 days)
    and adjuvant (1 year)
    (Phase II)
    November 2021 January 2013 2 EGFR Mutations Afatinib for 2 years Afatinib for 3 months I to III 92 Adjuvant Afatinib (Phase III)

    4.2. EMERGING Trial

    The EMERGING Trial recruited 72 patients with resected NSCLC to this investigation [29]. Participants with stage IIIA-N2 NSCLC bearing EGFR mutation in exon 19 or 21 were randomized to erlotinib vs. combination of gemcitabine plus cisplatin. Erlotinib is first given as neoadjuvant for 42 days followed by one year as adjuvant therapy. Gemcitabine and cisplatin are given for two cycles of neoadjuvant therapy followed by a further two cycles of adjuvant therapy. The outcomes of the research include PFS and OS at three years. Post-surgery care for up to two years comprised of chest computerized tomography (CT) scan, abdominal ultrasound every three months, brain MRI bi-annually and bone scan once a year. Study results are expected to be published on December 2022 (Table 6).

    4.3. Adjuvant Afatinib Trial

    Briefly, 95 patients with resected NSCLC were enrolled [34]. Inclusion criteria were diagnosis of stage I to III NSCLC harboring EGFR mutations. Participants were randomized to short course (three months) afatinib vs. long course (two years) afatinib. Patients were followed up every six months for three years and then once in the fourth year. Chest CT scan, blood tests, performance status, and a physical exam were conducted at these follow ups. Study results are estimated for November 2021 (Table 6).

    The entry is from 10.3390/cancers13164119


    1. Miller, K.D.; Nogueira, L.; Mariotto, A.B.; Rowland, J.H.; Yabroff, K.R.; Alfano, C.M.; Jemal, A.; Kramer, J.L.; Siegel, R.L. Cancer Treatment and Survivorship Statistics, 2019. CA Cancer J. Clin. 2019, 69, 363–385.
    2. Siegel, R.L.; Miller, K.D.; Jemal, A. Cancer Statistics, 2019. CA Cancer J. Clin. 2019, 69, 7–34.
    3. Siegel, R.L.; Miller, K.D.; Fuchs, H.E.; Jemal, A. Cancer Statistics, 2021. CA Cancer J. Clin. 2021, 71, 7–33.
    4. Duma, N.; Santana-Davila, R.; Molina, J.R. Non–Small Cell Lung Cancer: Epidemiology, Screening, Diagnosis, and Treatment. Mayo Clin. Proc. 2019, 94, 1623–1640.
    5. Fischer, B.M.; Mortensen, J.; Hansen, H.; Vilmann, P.; Larsen, S.S.; Loft, A.; Bertelsen, A.K.; Ravn, J.; Clementsen, P.; Høegholm, A.; et al. Multimodality Approach to Mediastinal Staging in Non-Small Cell Lung Cancer. Faults and Benefits of PET-CT: A Randomised Trial. Thorax 2011, 66, 294–300.
    6. Pirker, R. Adjuvant Chemotherapy in Patients with Completely Resected Non-Small Cell Lung Cancer. Transl. Lung Cancer Res. 2014, 3, 305–310.
    7. NCCN Guidelines for Patients® 2021 Non-Small Cell Lung Cancer Early and Locally Advanced Non-Small Cell Lung Cancer, Types of Chemotherapy. 2021. Available online: https://www.nccn.org/patients/guidelines/content/PDF/lung-early-stage-patient.pdf (accessed on 12 June 2021).
    8. Simon, G.R.; Manegold, C.; Barker, S.S.; Treat, J.A.; Visseren-Grul, C.; Obasaju, C. Pemetrexed Use in the Adjuvant Setting for Completely Resectable Non-Small-Cell Lung Cancer. Clin. Lung Cancer 2013, 14, 601–608.
    9. Douillard, J.Y.; Tribodet, H.; Aubert, D.; Shepherd, F.A.; Rosell, R.; Ding, K.; Veillard, A.S.; Seymour, L.; le Chevalier, T.; Spiro, S.; et al. Adjuvant Cisplatin and Vinorelbine for Completely Resected Non-Small Cell Lung Cancer: Subgroup Analysis of the Lung Adjuvant Cisplatin Evaluation. J. Thorac. Oncol. 2010, 5, 220–228.
    10. Nakra, T.; Mehta, A.; Bal, A.; Nambirajan, A.; Mishra, D.; Midha, D.; Gupta, N.; Arora, N.; Gupta, P.; Gupta, P.; et al. Epidermal Growth Factor Receptor Mutation Status in Pulmonary Adenocarcinoma: Multi-Institutional Data Discussion at National Conference of “Lung Cancer Management in Indian Context”. Curr. Probl. Cancer 2020, 44, 100561.
    11. Noronha, V.; Pinninti, R.; Patil, V.M.; Joshi, A.; Prabhash, K. Lung Cancer in the Indian Subcontinent. South Asian J. Cancer 2016, 5, 095–103.
    12. Jänne, P.A.; Wang, X.; Socinski, M.A.; Crawford, J.; Stinchcombe, T.E.; Gu, L.; Capelletti, M.; Edelman, M.J.; Villalona-Calero, M.A.; Kratzke, R.; et al. Randomized Phase II Trial of Erlotinib Alone or with Carboplatin and Paclitaxel in Patients Who Were Never or Light Former Smokers with Advanced Lung Adenocarcinoma: CALGB 30406 Trial. J. Clin. Oncol. 2012, 30, 2063–2069.
    13. Food and Drug Administration FDA Approves Osimertinib as Adjuvant Therapy for Non-Small Cell Lung Cancer with EGFR Mutations | FDA. Available online: https://www.fda.gov/drugs/resources-information-approved-drugs/fda-approves-osimertinib-adjuvant-therapy-non-small-cell-lung-cancer-egfr-mutations (accessed on 21 May 2021).
    14. Wu, Y.-L.; Tsuboi, M.; He, J.; John, T.; Grohe, C.; Majem, M.; Goldman, J.W.; Laktionov, K.; Kim, S.-W.; Kato, T.; et al. Osimertinib in Resected EGFR-Mutated Non–Small-Cell Lung Cancer. N. Engl. J. Med. 2020, 383, 1711–1723.
    15. Zhong, W.Z.; Wang, Q.; Mao, W.M.; Xu, S.T.; Wu, L.; Wei, Y.C.; Liu, Y.Y.; Chen, C.; Cheng, Y.; Yin, R.; et al. Gefitinib versus Vinorelbine plus Cisplatin as Adjuvant Treatment for Stage II-IIIA (N1-N2) EGFR-Mutant NSCLC: Final Overall Survival Analysis of CTONG1104 Phase III Trial. J. Clin. Oncol. 2021, 39, 713–722.
    16. Zhong, W.Z.; Wang, Q.; Mao, W.M.; Xu, S.T.; Wu, L.; Shen, Y.; Liu, Y.Y.; Chen, C.; Cheng, Y.; Xu, L.; et al. Gefitinib versus Vinorelbine plus Cisplatin as Adjuvant Treatment for Stage II–IIIA (N1–N2) EGFR-Mutant NSCLC (ADJUVANT/CTONG1104): A Randomised, Open-Label, Phase 3 Study. Lancet Oncol. 2018, 19, 139–148.
    17. Pennell, N.A.; Neal, J.W.; Chaft, J.E.; Azzoli, C.G.; Jänne, P.A.; Govindan, R.; Evans, T.L.; Costa, D.B.; Wakelee, H.A.; Heist, R.S.; et al. Select: A Phase II Trial of Adjuvant Erlotinib in Patients with Resected Epidermal Growth Factor Receptor-Mutant Non-Small-Cell Lung Cancer. J. Clin. Oncol. 2019, 37, 97–104.
    18. Chang, W.Y.; Wu, Y.L.; Su, P.L.; Yang, S.C.; Lin, C.C.; Su, W.C. The Impact of EGFR Mutations on the Incidence and Survival of Stages I to III NSCLC Patients with Subsequent Brain Metastasis. PLoS ONE 2018, 13, e0192161.
    19. Scagliotti, G.V. The ALPI Trial: The Italian/European Experience with Adjuvant Chemotherapy in Resectable Non-Small Lung Cancer. Clin. Cancer Res. 2005, 11, 5011s–5016s.
    20. Arriagada, R.; Bergman, B.; Dunant, A.; le Chevalier, T.; Pignon, J.-P.; Vansteenkiste, J. Cisplatin-Based Adjuvant Chemotherapy in Patients with Completely Resected Non–Small-Cell Lung Cancer. N. Engl. J. Med. 2004, 350, 351–360.
    21. Waller, D.; Peake, M.D.; Stephens, R.J.; Gower, N.H.; Milroy, R.; Parmar, M.K.B.; Rudd, R.M.; Spiro, S.G. Chemotherapy for Patients with Non-Small Cell Lung Cancer: The Surgical Setting of the Big Lung Trial. Eur. J. Cardio Thorac. Surg. 2004, 26, 173–182.
    22. Strauss, G.M.; Herndon, J.E.; Maddaus, M.A.; Johnstone, D.W.; Johnson, E.A.; Harpole, D.H.; Gillenwater, H.H.; Watson, D.M.; Sugarbaker, D.J.; Schilsky, R.L.; et al. Adjuvant Paclitaxel plus Carboplatin Compared with Observation in Stage IB Non-Small-Cell Lung Cancer: CALGB 9633 with the Cancer and Leukemia Group B, Radiation Therapy Oncology Group, and North Central Cancer Treatment Group Study Groups. J. Clin. Oncol. 2008, 26, 5043–5051.
    23. Winton, T.; Livingston, R.; Johnson, D.; Rigas, J.; Johnston, M.; Butts, C.; Cormier, Y.; Goss, G.; Inculet, R.; Vallieres, E.; et al. Vinorelbine plus Cisplatin vs. Observation in Resected Non–Small-Cell Lung Cancer. N. Engl. J. Med. 2005, 352, 2589–2597.
    24. Douillard, J.Y.; Rosell, R.; de Lena, M.; Carpagnano, F.; Ramlau, R.; Gonzáles-Larriba, J.L.; Grodzki, T.; Pereira, J.R.; le Groumellec, A.; Lorusso, V.; et al. Adjuvant Vinorelbine plus Cisplatin versus Observation in Patients with Completely Resected Stage IB-IIIA Non-Small-Cell Lung Cancer (Adjuvant Navelbine International Trialist Association [ANITA]): A Randomised Controlled Trial. Lancet Oncol. 2006, 7, 719–727.
    25. Gefitinib | C22H24ClFN4O3—PubChem. Available online: https://pubchem.ncbi.nlm.nih.gov/compound/Gefitinib (accessed on 26 May 2021).
    26. FDA; CDER. Highlights of Prescribing Information for IRESSA (Gefitinib); 2018. Available online: https://www.accessdata.fda.gov/drugsatfda_docs/label/2018/206995s003lbl.pdf (accessed on 29 June 2021).
    27. Osimertinib | C28H33N7O2—PubChem. Available online: https://pubchem.ncbi.nlm.nih.gov/compound/Osimertinib (accessed on 26 May 2021).
    28. FDA; CDER. Highlights of Prescribing Information for TAGRISSO (Osimertinib); 2018. Available online: https://www.accessdata.fda.gov/drugsatfda_docs/label/2018/208065s011lbl.pdf (accessed on 29 June 2021).
    29. Li, N.; Ou, W.; Ye, X.; Sun, H.B.; Zhang, L.; Fang, Q.; Zhang, S.L.; Wang, B.X.; Wang, S.Y. Pemetrexed-Carboplatin Adjuvant Chemotherapy with or without Gefitinib in Resected Stage IIIA-N2 Non-Small Cell Lung Cancer Harbouring EGFR Mutations: A Randomized, Phase II Study. Ann. Surg. Oncol. 2014, 21, 2091–2096.
    30. Erlotinib | C22H23N3O4—PubChem. Available online: https://pubchem.ncbi.nlm.nih.gov/compound/Erlotinib (accessed on 26 May 2021).
    31. FDA; CDER. Highlights of Prescribing Information for TARCEVA (Erlotinib); 2016. Available online: https://www.accessdata.fda.gov/drugsatfda_docs/label/2010/021743s14s16lbl.pdf (accessed on 29 June 2021).
    32. Yue, D.; Xu, S.; Wang, Q.; Li, X.; Shen, Y.; Zhao, H.; Chen, C.; Mao, W.; Liu, W.; Liu, J.; et al. Erlotinib versus Vinorelbine plus Cisplatin as Adjuvant Therapy in Chinese Patients with Stage IIIA EGFR Mutation-Positive Non-Small-Cell Lung Cancer (EVAN): A Randomised, Open-Label, Phase 2 Trial. Lancet Respir. Med. 2018, 6, 863–873.
    33. Erlotinib Hydrochloride in Treating Patients with Stage IB-IIIA Non-Small Cell Lung Cancer That Has Been Completely Removed by Surgery (An ALCHEMIST Treatment Trial)—Full Text View—ClinicalTrials.Gov. Available online: https://clinicaltrials.gov/ct2/show/NCT02193282?term=ALCHEMIST&cond=Lung+Cancer&draw=2&rank=4 (accessed on 26 May 2021).
    34. Adjuvant Afatinib in Stage I-III NSCLC with EGFR Mutation—Full Text View—ClinicalTrials.Gov. Available online: https://clinicaltrials.gov/ct2/show/NCT01746251?term=adjuvant+egfr&recrs=d&cond=lung+cancer&draw=2&rank=4 (accessed on 26 May 2021).