Bio

Professional Education


  • Doctor of Medicine, Harvard Medical School (2007)
  • Master of Public Administration, Harvard Kennedy School of Government (2007)
  • Bachelor of Arts, Harvard College (2002)

Stanford Advisors


Publications

Journal Articles


  • Germline Mutations in Driver Oncogenes and Inherited Lung Cancer Risk Independent of Smoking History. Journal of the National Cancer Institute Oxnard, G. R., Nguyen, K. S., Costa, D. B. 2013

    View details for DOI 10.1093/jnci/djt361

    View details for PubMedID 24317178

  • Patterns of care for non-small-cell lung cancer at an academic institution affiliated with a national cancer institute-designated cancer center. Journal of oncology practice / American Society of Clinical Oncology Nguyen, K. H., Sanford, R. A., Huberman, M. S., Goldstein, M. A., McDonald, D. M., Farquhar, M., Gangadharan, S. P., Kent, M. S., Michaud, G., Majid, A., Berman, S. M., Aronovitz, J. A., Nedea, E. A., Boiselle, P. M., Cohen, D. W., Kobayashi, S., Costa, D. B. 2012; 8 (1): 57-62

    Abstract

    Evidence-based treatment guidelines for non-small-cell lung cancer (NSCLC) exist to improve the quality of care for patients with this disease. However, how often evidence-based decisions are used for care of NSCLC is poorly understood.We examined patterns of care and rate of adherence to evidence-based guidelines for 185 new NSCLC patients seen between 2007 and 2009. Evidence-based care status was determined for 150 patients.Eighty-one percent of the patients were white, the mean age was 66 years, 49% were women, 11% were never smokers, 83% had Eastern Cooperative Oncology Group performance status 0 to 1, 49.7% of tumors were adenocarcinomas, 57.1% of never smokers had tumors genotyped (EGFR, ALK, KRAS), and 13.3% participated in clinical trials. The rate of evidence-based treatment adherence was 94.1% (16 of 17), 100% (21 of 21) and 100% (36 of 36) in patients with stages I, II, and III NSCLC, respectively. Stage IV disease, with adherence of 76.3% (58 of 76), was correlated with a higher rate of nonadherence when compared with stages I-III (odds ratio 16.33; 95% CI, 1.94 to 137.73). In patients with stage IV disease, the rate of evidence-based adherence was 95% (72 of 76) for first-line therapy, 95.2% (40 of 42) for second-line therapy, and only 33.3% (6 of 18) for third-line therapy (P < .001). There was no significant correlation between evidence-based adherence status and the patient's age, sex, performance status, smoking history, ethnicity, or the treating physician.These data point toward the need for improved evidence-based use of resources in the third-line setting of stage IV NSCLC.

    View details for DOI 10.1200/JOP.2011.000274

    View details for PubMedID 22548013

  • First-line treatment of EGFR-mutant non-small-cell lung cancer: the role of erlotinib and other tyrosine kinase inhibitors. Biologics : targets & therapy Nguyen, K. H., Neal, J. W. 2012; 6: 337-345

    Abstract

    Epidermal growth factor receptor tyrosine kinase inhibitors (EGFR TKIs) were initially established as second- or third-line treatment of advanced non-small-cell lung cancer (NSCLC). Subsequent studies, including IPASS, OPTIMAL, and EURTAC, have demonstrated that these TKIs are effective first-line therapeutic options in patients with tumors harboring activating mutations in the EGFR gene. The TKIs are better tolerated than conventional chemotherapy, with frequent yet mild side effects such as rash and diarrhea, and rarely interstitial lung disease. Because most patients on TKIs develop resistance due to a variety of mechanisms, the use of TKIs in the acquired-resistance setting and in the setting of earlier-staged cancers is being extensively studied. Here we review the major trials leading to the established use of EGFR TKIs in NSCLC, followed by discussion of recently completed and ongoing trials using the next-generation EGFR inhibitor afatinib.

    View details for DOI 10.2147/BTT.S26558

    View details for PubMedID 23055691

  • Case series of treatment approaches in fit nonagenarians with stage IV non-small-cell lung cancer. Journal of thoracic disease Britt, G. J., Gaughan, E. M., Nguyen, K. H., Warner, J. L., Goldstein, M. A., Huberman, M. S., Costa, D. B. 2011; 3 (2): 141-143

    Abstract

    An increasing number of nonagenarians are treated for non-small-cell lung cancer (NSCLC); however guidelines and case series describing the care of very elderly patients with advanced NSCLC are not available. Medical records of patients treated at Beth Israel Deaconess Medical Center between 2007 and 2009 who had NSCLC were reviewed, and those with stage IV NSCLC and age 90 or older were included in this case series. Three successive fit nonagenarians were identified out of the one hundred and one cases with stage IV NSCLC, and their clinical course was summarized. The first case depicts a conservative approach (best supportive care), while the later cases describe the use of platinum-based (carboplatin-pemetrexed) and anti-epidermal growth factor targeted therapies. This series illustrates the diversity of approaches now available and the evolving treatment paradigm as it applies to fit elderly with NSCLC, including nonagenarians. It also emphasizes the importance of considering performance status rather than biologic age when making treatment decisions.

    View details for DOI 10.3978/j.issn.2072-1439.2011.03.02

    View details for PubMedID 22263078

  • Acquired Resistance to Epidermal Growth Factor Receptor Tyrosine Kinase Inhibitors in Non-Small-Cell Lung Cancers Dependent on the Epidermal Growth Factor Receptor Pathway CLINICAL LUNG CANCER Nguyen, K. H., Kobayashi, S., Costa, D. B. 2009; 10 (4): 281-289

    Abstract

    Most advanced non-small-cell lung cancers (NSCLCs) with activating epidermal growth factor receptor (EGFR) mutations (exon 19 deletions or L858R) initially respond to the EGFR tyrosine kinase inhibitors (TKIs) gefitinib and erlotinib. However, over time (median of 6-12 months), most tumors develop acquired resistance to EGFR TKIs. Intense research in these NSCLCs has identified two major mechanisms of resistance to gefitinib/erlotinib: secondary resistance mutations and "oncogene kinase switch" systems. The secondary T790M mutation occurs in 50% of EGFR-mutated patients with TKI resistance, and in vitro, this mutation negates the hypersensitivity of activating EGFR mutations. Sensitive detection methods have identified a proportion of TKI-naive tumors that carry T790M, and these resistant clones may be selected after exposure to gefitinib or erlotinib. Other secondary resistance mutations (D761Y, L747S, T854A) seem to be rare. The amplification of the MET oncogene is present in 20% of TKI-resistant tumors; however, in half of the cases with this "oncogene kinase switch" mechanism the T790M is coexistent. It is possible that other kinases (such as insulin-like growth factor-1 receptor [IGF-1R]) might also be selected to bypass EGFR pathways in resistant tumors. The growing preclinical data in EGFR-mutated NSCLCs with acquired resistance to gefitinib or erlotinib has spawned the initiation or conception of clinical trials testing novel EGFR inhibitors that in vitro inhibit T790M (neratinib, XL647, BIBW 2992, and PF-00299804), MET, or IGF-1R inhibitors in combination with EGFR TKIs, and heat shock protein 90 inhibitors. Ongoing preclinical and clinical research in EGFR-mutated NSCLC has the potential to significantly improve the outcomes of patients with these somatic mutations.

    View details for DOI 10.3816/CLC.2009.n.039

    View details for Web of Science ID 000268129600011

    View details for PubMedID 19632948

  • Effects of Erlotinib in EGFR Mutated Non-Small Cell Lung Cancers with Resistance to Gefitinib CLINICAL CANCER RESEARCH Costa, D. B., Nguyen, K. H., Cho, Y. C., Sequist, L. V., Jackman, D. M., Riely, G., Yeap, B. Y., Halmos, B., Kim, J. H., Jaenne, P. A., Huberman, M. S., Pao, W., Tenen, D. G., Kobayashi, S. 2008; 14 (21): 7060-7067

    Abstract

    Most lung cancers with activating epidermal growth factor receptor (EGFR) mutations respond to gefitinib; however, resistance to this tyrosine kinase inhibitor (TKI) invariably ensues. The T790M mutation occurs in 50% and MET amplification in 20% of TKI-resistant tumors. Other secondary mutations (D761Y and L747S) are rare. Our goal was to determine the effects of erlotinib 150 mg/d in EGFR mutated patients resistant to gefitinib 250 mg/d, because the EGFR TKI erlotinib is given at a higher biologically active dose than gefitinib.Retrospective review of 18 EGFR mutated (exon 19 deletions, L858R, and L861Q) patients that were given gefitinib and subsequently erlotinib. Seven patients had tumor resampling after TKI therapy and were analyzed for secondary EGFR mutations and MET amplification.Most patients (14 of 18) responded to gefitinib with median progression-free survival of 11 months (95% confidence interval, 4-16). After gefitinib resistance (de novo or acquired), 78% (14 of 18) of these patients displayed progressive disease while on erlotinib with progression-free survival of 2 months (95% confidence interval, 2-3). Six of 7 resampled patients acquired the T790M mutation, and 0 of 3 had MET amplification. Only 1 gefitinib-resistant patient with the acquired L858R-L747S EGFR, which in vitro is sensitive to achievable serum concentrations of erlotinib 150 mg/d, achieved a partial response to erlotinib.In EGFR mutated tumors resistant to gefitinib 250 mg/d, a switch to erlotinib 150 mg/d does not lead to responses in most patients. These findings are consistent with preclinical models, because the common mechanisms of TKI resistance (T790M and MET amplification) in vitro are not inhibited by clinically achievable doses of gefitinib or erlotinib. Alternative strategies to overcome TKI resistance must be evaluated.

    View details for DOI 10.1158/1078-0432.CCR-08-1455

    View details for Web of Science ID 000260732200042

    View details for PubMedID 18981003

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