Boards, Advisory Committees, Professional Organizations

  • Global Health Postdoctoral Affiliate, Center for Innovation and Global Health (2023 - Present)

Stanford Advisors

All Publications

  • Intraoperative Molecular Imaging of Lung Cancer. Thoracic surgery clinics Wong, L., Lui, N. S. 2023; 33 (3): 227-232


    Intraoperative molecular imaging innovations have been propelled by the development of fluorescent contrast agents that specifically target tumor tissues and advanced camera systems that can detect the specified fluorescence. The most promising agent to date is OTL38, a targeted and near-infrared agent that was recently approved by the Food and Drug Administration for intraoperative imaging for lung cancer.

    View details for DOI 10.1016/j.thorsurg.2023.04.013

    View details for PubMedID 37414478

  • The impact of neoadjuvant immunotherapy on perioperative outcomes and survival after esophagectomy for esophageal cancer. JTCVS open Wong, L., Liou, D. Z., Backhus, L. M., Lui, N. S., Shrager, J. B., Berry, M. F. 2023; 14: 547-560


    Objective: Immunotherapy for esophageal cancer is relatively novel but increasingly used. This study evaluated the early use of immunotherapy as an adjunct to neoadjuvant chemoradiotherapy before esophagectomy for locally advanced disease.Methods: Perioperative morbidity (composite of mortality, hospitalization ≥21days, or readmission) and survival of patients with locally advanced (cT3N0M0, cT1-3N + M0) distal esophageal cancer in the National Cancer Database from 2013 to 2020 who underwent neoadjuvant immunotherapy plus chemoradiotherapy or chemoradiotherapy alone followed by esophagectomy were evaluated using logistic regression, Kaplan-Meier curves, Cox proportional hazards methods, and propensity-matched analysis.Results: Immunotherapy was used in 165 (1.6%) of 10,348 patients. Younger age (odds ratio, 0.66; 95% confidence interval, 0.53-0.81; P<.001) predicted immunotherapy use, which slightly delayed time from diagnosis to surgery versus chemoradiation alone (immunotherapy 148 [interquartile range, 128-177] days vs chemoradiation 138 [interquartile range, 120-162] days, P<.001). There were no statistically significant differences between the immunotherapy and chemoradiation groups for the composite major morbidity index (14.5% [24/165] vs 15.6% [1584/10,183], P=.8). Immunotherapy was associated with a significant improvement in median overall survival (69.1months vs 56.3months, P=.005) and 3-year overall survival in univariate analysis (65.6% [95% confidence interval, 57.7-74.5] vs 55.0% [53.9-56.1], P=.005), and independently predicted improved survival in multivariable analysis (hazard ratio 0.68 [95% confidence interval, 0.52-0.89], P=.006). Propensity-matched analysis also showed that immunotherapy use was not associated with increased surgical morbidity (P=.5) but was associated with improved survival (P=.047).Conclusions: Neoadjuvant immunotherapy use before esophagectomy for locally advanced esophageal cancer did not lead to worse perioperative outcomes and shows promising results on midterm survival.

    View details for DOI 10.1016/j.xjon.2023.03.015

    View details for PubMedID 37425457

  • Surgical Management of Esophageal Perforation: Examining Trends in a Multi-Institutional Cohort. Journal of gastrointestinal surgery : official journal of the Society for Surgery of the Alimentary Tract Wong, L. Y., Leipzig, M., Liou, D. Z., Backhus, L. M., Lui, N. S., Shrager, J. B., Berry, M. F. 2023


    Esophageal perforations historically are associated with significant morbidity and mortality and generally require emergent intervention. The influence of improved diagnostic and therapeutic modalities available in recent years on management has not been examined. This study examined the surgical treatments and outcomes of a modern cohort.Patients with esophageal perforation management in the 2005-2020 American College of Surgeons National Surgical Quality Improvement Program database were stratified into three eras (2005-2009, 2010-2014, and 2015-2020). Surgical management was classified as primary repair, resection, diversion, or drainage alone based on procedure codes. The distribution of procedure use, morbidity, and mortality across eras was examined.Surgical management of 378 identified patients was primary repair (n=193,51%), drainage (n=89,24%), resection (n=70,18%), and diversion (n=26,7%). Thirty-day mortality in the cohort was 9.5% (n=36/378) and 268 patients (71%) had at least one complication. The median length of stay was 15 days. Both morbidity (Era 1 65% [n=42/60] versus Era 2 69% [n=92/131] versus Era 3 72% [n=135/187], p=0.3) and mortality (Era 1 11% [n=7/65] versus Era 2 9% [n=12/131] versus Era 3 10% [n=19/187], p=0.9) did not change significantly over the three defined eras. Treatment over time evolved such that primary repair was more frequently utilized (43% in Era 1 to 51% in Era 3) while diversion was less often performed (13% in Era 1 to 7% in Era 3) (p=0.009).Esophageal perforation management in recent years uses diversion less often but remains associated with significant morbidity and mortality.

    View details for DOI 10.1007/s11605-023-05700-1

    View details for PubMedID 37165161

    View details for PubMedCentralID 7330325

  • Consequences of a Failed Nonoperative Approach in Paraesophageal Hernia Management. The Annals of thoracic surgery Wong, L. Y., Berry, M. F. 2023

    View details for DOI 10.1016/j.athoracsur.2023.03.020

    View details for PubMedID 36963646

  • ASO Visual Abstract: Impact of Delaying Surgery After Chemoradiation on Outcomes for Locally Advanced Esophageal Squamous Cell Carcinoma. Annals of surgical oncology Wong, L. Y., Liou, D. Z., Vitzthum, L. K., Backhus, L. M., Lui, N. S., Chang, D., Shrager, J. B., Berry, M. F. 2023

    View details for DOI 10.1245/s10434-023-13156-5

    View details for PubMedID 36759429

  • The Impact of Age and Need for Emergent Surgery in Paraesophageal Hernia Repair Outcomes. The Annals of thoracic surgery Wong, L. Y., Parsons, N., David, E. A., Burfeind, W., Berry, M. F. 2023


    Observation of paraesophageal hernias (PEH) may lead to emergent surgery for hernia-related complications. This study evaluated urgent/emergent repair outcomes to quantify the possible sequelae of failed conservative PEH management.The impact of operative status (Elective vs. Urgent/Emergent) on perioperative mortality or major morbidity for patients who underwent hiatal hernia repair for a paraesophageal hernia diagnosis from 2012-2021 in the Society of Thoracic Surgery General Thoracic Surgery Database was evaluated with multivariable logistic regression models.Overall, 2,082 (10.9%) of 19,122 PEH patients underwent Urgent/Emergent repair. Non-elective surgery patients were significantly older than elective surgery patients (median age 73 years [IQR 63-82] versus 66 [58-74]) and had a lower preoperative performance score (p<0.001). Non-elective surgeries were more likely to be done through the chest or via laparotomy rather than via laparoscopy (20% versus 11.4%, p<0.001) and were associated with longer hospitalizations (4 days vs 2, p<0.001), higher operative mortality (4.5% vs 0.6%, p<0.001), and higher major morbidity (27% versus 5.5%, p<0.001). Non-elective surgery was a significant independent predictor of major morbidity in multivariable analysis (odds ratio 2.06, p<0.001). Patients over the age of 80 had higher operative mortality (4.3% vs 0.6%, p<0.001) and major morbidity (19% vs 6.1%, p<0.001) than younger patients overall, and more often had non-elective surgery (26% vs 8.6%, p<0.001) CONCLUSIONS: The operative morbidity of PEH repair is significantly increased when surgery is non-elective, particularly for older patients. These results can inform the potential consequences of choosing watchful waiting versus elective PEH repair.

    View details for DOI 10.1016/j.athoracsur.2023.01.017

    View details for PubMedID 36702291

  • ASO Author Reflections: Timing of Surgery and Chemoradiation for Esophageal Squamous Cell Carcinoma. Annals of surgical oncology Wong, L., Berry, M. F. 2023

    View details for DOI 10.1245/s10434-022-13048-0

    View details for PubMedID 36607525

  • Impact of Delaying Surgery After Chemoradiation on Outcomes for Locally Advanced Esophageal Squamous Cell Carcinoma. Annals of surgical oncology Wong, L., Liou, D. Z., Vitzthum, L. K., Backhus, L. M., Lui, N. S., Chang, D., Shrager, J. B., Berry, M. F. 2022


    BACKGROUND: Performing selective esophagectomy for locally advanced squamous cell carcinoma may spare patients morbidity, but delayed surgery may infer higher risks. This study evaluated the impact of length of time between chemoradiation and esophagectomy on perioperative outcomes and long-term survival.METHODS: The impact of surgical timing, stratified by surgery performed < 180 and ≥ 180 days from starting radiation, on perioperative outcomes and survival in patients treated with chemoradiation and esophagectomy for cT1N + M0 and cT2-4, any N, M0 squamous cell carcinoma of the mid-distal esophagus in the National Cancer Database (2006-2016) was evaluated with logistic regression, Kaplan-Meier curves, Cox proportional-hazards methods, and propensity-matched analysis.RESULTS: Median time between starting radiation and esophagectomy in 1641 patients was 93 (IQR 81-114) days. Most patients (96.8%, n = 1589) had surgery within 180 days of starting radiation, while 52 patients (3.2%) had delayed surgery. Black race and clinical T stage were associated with delayed surgery. Rates of pathologic upstaging, downstaging, complete response, and positive margins were not significantly different between the groups. Patients with delayed surgery had increased major morbidity as measured by a composite of length of hospital stay, readmission, and 30-day mortality [42.3% (22/52) vs 22.3% (355/1589), p = 0.001]. However, delayed surgery was not associated with a significant difference in survival in both univariate [5-year survival 32.8% (95% CI 21.1-50.7) vs 47.3% (44.7-50.1), p = 0.19] and multivariable analysis [hazard ratio (HR) 1.23 (0.85-1.78), p = 0.26].CONCLUSIONS: Delaying surgery longer than 180 days after starting chemoradiation for esophageal squamous cell carcinoma is associated with worse perioperative outcomes but not long-term survival.

    View details for DOI 10.1245/s10434-022-12980-5

    View details for PubMedID 36572807