A Pilot Study of Sirolimus in Subjects with Cowden Syndrome or Other Syndromes Characterized by Germline Mutations in PTEN.

LESSONS LEARNED: This is the first human interventional study in patients with Cowden syndrome that is driven by inactivation of germline PTEN gene.Single-agent sirolimus, a mTOR inhibitor, suppressed mTOR signaling in surrogate human tissues without significant toxicity. BACKGROUND: Cowden syndrome is characterized by inactivating germline PTEN mutations, which can lead to activation of the PI3K-Akt-mTOR pathway. METHODS: Adult subjects with germline PTEN mutation who met international diagnostic criteria for Cowden syndrome and who had Eastern Cooperative Oncology Group (ECOG) performance status 0-2 and adequate organ function were enrolled. Subjects were treated with a 56-day course of daily oral sirolimus. In addition to symptom assessment and physical examination, dermatologic, endoscopic, neurologic (cerebellar), and radiographic assessments were conducted. Inhibition of the mTOR pathway in benign skin and gastrointestinal (GI) lesion was assessed by immunohistochemistry. RESULTS: A total of 18 patients and 16 families were enrolled. PTEN mutations were located at exons 1-8. Regression of skin and GI lesions was observed by dermoscopy or endoscopy. Neurological evaluation showed improvement in cerebellar function score at 1 month. Immunohistochemistry (IHC) analysis in skin and GI benign lesions showed a decrease in the ratio of phosphorylated (p)S6 to total S6 in response to sirolimus. Ratios of pS6K to total S6 at days 14 and 56 were significantly lower than at baseline (p = .0026, p = .00391, respectively). A 56-day course of sirolimus was well tolerated. CONCLUSION: A 56-day course of sirolimus was well tolerated in subjects with Cowden syndrome and was associated with some evidence of improvement in symptoms, skin and GI lesions, cerebellar function, and decreased mTOR signaling.

Status of oncologic specialties: global survey of physicians treating cancer.

BACKGROUND: In the United States, medical oncologists play a central role in the management of systemic therapy for cancer patients. Medical oncology as a specialty is not as established in Japan and several other European nations according to recent surveys, and little is known about this specialty in developing nations. We aimed to identify global differences in the roles of physicians treating cancer; specifically, how the management of advanced disease differs among nations. METHODS: In March 2016, a self-administered internet survey was conducted with degreed physicians who prescribed systemic agents for adult cancer treatment within the past 5 years. Physicians were identified from the American Society of Clinical Oncology active member online directory. RESULTS: Among 3907 members in 55 nations, 376 (9.6%) responded to the survey. The 310 respondents who provided an answer to the recognition of medical oncology were dominated by male MDs that have practiced for more than 5 years at academic centers, and ~60% were medical oncologists. A majority of the respondents in all four regions reported that medical oncology was established in their corresponding nations. However, there are several outlying nations where oncologic specialties play a minimal role in the management of systemic therapy. CONCLUSION: Despite general recognition of medical oncology, the role is not globally established as the primary point of care for delivery of systemic therapy. Nations lacking this specialty should be assisted by the international community to develop medical oncology.

The Clinical Role of Adjuvant Chemotherapy after Sublobar Resection for Non-Small-Cell Lung Cancer ≤ 20 mm with Lymph Node Metastases: A Propensity-Matched Analysis of the National Cancer Database.

Sublobar resection is a standard surgical procedure for small-sized non-small-cell lung cancer (NSCLC). However, the clinical role of adjuvant chemotherapy for small-sized NSCLC with pathological lymph node (LN) metastasis after sublobar resection is unknown. The National Cancer Database was queried for NSCLC patients between 2004 and 2018. Eligibility included sublobar resection with pathological LN metastasis, R0 resection, Charlson comorbidity score = 0, clinical stage T1a-b, and tumor size ≤ 20 mm. The Kaplan-Meier method with a log-rank test and multivariable Cox proportional hazards analyses were used for assessing survival. The samples were evaluated before and after propensity score matching (PSM) with respect to age, sex, histologic type, and pathological LN status. Of 810 patients who met the eligibility criteria, 567 (70.0%) underwent adjuvant chemotherapy. After PSM, patients with adjuvant chemotherapy had a significantly longer survival than those without (median survival: 64.3 vs. 34.0 months, hazard ratio for death: 0.61, p < 0.0001). Multivariate analyses after PSM showed that younger age (p = 0.0206), female (p = 0.0005), and adjuvant chemotherapy (p < 0.0001) were independent prognostic factors for longer survival. Adjuvant chemotherapy has a prognostic impact in patients with small-sized NSCLC and pathological lymph node metastasis who undergo sublobar resection.

Prognostic Implications of Timing of Immunotherapy in Stage IV Non-Small Cell Lung Cancer.

Background: Currently, the established approach for addressing stage IV non-small cell lung cancer (NSCLC) involves combining chemotherapy with immunotherapy. However, the necessity for molecular analysis prior to commencing immunotherapy often results in a delay in its initiation following the commencement of chemotherapy. Therefore, this study aimed to study the significance of postponing immunotherapy on pertinent patient outcomes. Methods: Using the National Cancer Database (NCBD), patients diagnosed with stage IV NSCLC between 2017 and 2018 were screened. Inclusion criteria comprised those treated with multi-agent chemotherapy as the first-line therapy within 30 days of treatment, surviving beyond 2 months of diagnosis, and absence of neuroendocrine pathology. Patients were grouped among those receiving immunotherapy within 30 days of chemotherapy, immunotherapy within 31 - 60 days of chemotherapy, or chemotherapy alone. Clinical characteristics were collected and their correlation with the timing of immunotherapy was evaluated. The impact of delaying immunotherapy on overall survival (OS) was investigated using Kaplan-Meier analysis. Multivariate Cox regression analysis was employed to identify independent prognostic variables associated with OS. Results: Our cohort comprised 99,008 patients with clinical stage IV NSCLC diagnosed between 2017 and 2018, which were distributed in the three treatment groups described above. Patients receiving immunotherapy within 30 days of chemotherapy showed greater OS in contrast to both those subjected to delayed immunotherapy (hazard ratio (HR) = 0.74, 95% confidence interval (CI): 0.64 - 0.87, P = 0.0003). Subsequent multivariate regression analysis showed that postponing immunotherapy, older age, male sex, white race, non-adenocarcinoma histology, higher clinical N stage, use of radiation treatment, and presence of liver metastasis were all associated with worse OS. Conclusions: Introducing immunotherapy within the first 30 days of chemotherapy initiation significantly increases survival in patients with stage IV NSCLC.

Role of Pathologic Single-Nodal and Multiple-Nodal Descriptors in Resected Non-Small Cell Lung Cancer.

BACKGROUND: The eighth edition of lung cancer nodal staging assignment includes the location of lymph node metastasis, but does not include single-nodal and multiple-nodal descriptors. RESEARCH QUESTION: Do the single-nodal and multiple-nodal statuses stratify the prognosis of patients with non-small cell lung cancer (NSCLC)? STUDY DESIGN AND METHODS: Using the National Cancer Database, we analyzed patients with pathologically staged N1 and N2 NSCLC. Nodal descriptors were classified into pathological single N1 (pSingle-N1), pathological multiple N1 (pMulti-N1), pathological single N2 (pSingle-N2), and pathological multiple N2 (pMulti-N2). Survival analysis was performed using the Kaplan-Meier method and multivariable Cox regression models. RESULTS: In the general analysis cohort, 24,531, 22,256, 8,528, and 21,949 patients with NSCLC demonstrated pSingle-N1, pMulti-N1, pSingle-N2, and pMulti-N2 disease, respectively. Patients with pMulti-N1 and pMulti-N2 disease showed a shorter survival than those with pSingle-N1 and pSingle-N2 disease, respectively (hazard ratio, 1.22 [P < .0001] for N1 and 1.39 [P < .0001] for N2). After adjusting age, sex, and histologic findings, the hazard ratio for pSingle-N2 compared with pMulti-N1 disease was 1.05 (P = .0031). Patients with pN1 disease were categorized by metastatic lymph node count (1, 2, 3, ≥ 4), showing significant prognostic differences among groups (P < .0001). In the sensitivity analysis cohort (limited to R0 resection, lobectomy, or more; survival ≥ 30 days; ≥ 10 examined lymph nodes; and without neoadjuvant therapy; n = 34,904) and the external validation cohort (n = 708), analyses supported these results. INTERPRETATION: Patients with NSCLC with one metastatic lymph node, whether in N1 or N2 stations, showed better survival than those with more than one lymph node involved. Patients with NSCLC with a single-skip N2 lymph node metastasis showed survival similar to patients with multiple N1 lymph nodes, and the number of lymph nodes involved in N1 resections up to four or more was sequentially prognostic.

Germline PTEN mutation Cowden syndrome: an underappreciated form of hereditary kidney cancer.

PURPOSE: Cowden syndrome is a hereditary cancer syndrome associated with a germline mutation in PTEN. Patients are predisposed to multiple malignancies including renal cell carcinoma. MATERIALS AND METHODS: Patients with Cowden syndrome were evaluated as part of a clinical protocol. Those with a history of renal cell carcinoma underwent review of clinical features, tumor characteristics and family history. Renal tumors were evaluated for loss of heterozygosity. RESULTS: Among 24 patients with Cowden syndrome 4 were identified with renal cell carcinoma (16.7%). Three patients had solitary tumors, 2 with papillary type I histology and 1 with clear cell histology. The fourth patient had bilateral, synchronous chromophobe tumors. No patients had a prior family history of renal cell carcinoma. All patients with renal cell carcinoma had dermatologic manifestations of Cowden syndrome and had macrocephaly. Loss of heterozygosity at the PTEN mutation was identified in 4 tumors (80%). No genotype-phenotype association was found, as the same mutation was identified in different renal cell carcinoma histologies. CONCLUSIONS: Renal cell carcinoma is an underappreciated feature of Cowden syndrome. As most patients lack a prior family history or a distinctive renal cell carcinoma histology, recognition of the associated nonrenal features should target referral for genetic counseling. PTEN loss of heterozygosity is common in Cowden syndrome renal tumors. Because loss of PTEN can activate mTOR and mTOR inhibitors are Food and Drug Administration approved to treat renal cell carcinoma, these agents have clinical potential in renal cell carcinoma associated with Cowden syndrome.

t(11;19)(q21;p13) translocation in mucoepidermoid carcinoma creates a novel fusion product that disrupts a Notch signaling pathway.

Truncation of Notch1 has been shown to cause a subtype of acute leukemia, and activation of Notch4 has been associated with mammary and salivary gland carcinomas of mice. Here we identify a new mechanism for disrupting Notch signaling in human tumorigenesis, characterized by altered function of a new ortholog of the Drosophila melanogaster Notch co-activator molecule Mastermind. We cloned the t(11;19) translocation that underlies the most common type of human malignant salivary gland tumor. This rearrangement fuses exon 1 from a novel gene of unknown function at 19p13, termed mucoepidermoid carcinoma translocated 1 (MECT1), with exons 2-5 of a novel member of the Mastermind-like gene family (MAML2) at 11q21 (ref. 3). Similar to D. melanogaster Mastermind and MAML1 (refs. 4,5), full-length MAML2 functioned as a CSL (CBF-1, suppressor of hairless and Lag-1)-dependent transcriptional co-activator for ligand-stimulated Notch. In contrast, MECT1-MAML2 activated transcription of the Notch target gene HES1 independently of both Notch ligand and CSL binding sites. MECT1-MAML2 induced foci formation in RK3E epithelial cells, confirming a biological effect for the fusion product. These data suggest a new mechanism to disrupt the function of a Notch co-activator in a common type of malignant salivary gland tumor.

Exclusion of Patients with Autoimmune Disease in Lung Cancer Clinical Trials.

BACKGROUND: The exclusion of patients with autoimmune disease has been a topic of cancer immunotherapy trial. This study aims to find recent trends in exclusion of autoimmune disease. METHODS: Using the website clinicaltrials.gov, we searched for clinical trials that were initiated in 2012 or later and enrolled patients with lung cancer who were treated with PD-1/PD-L1 therapy. Only trials including US locations were analyzed. RESULTS: A total of 198 trials met screening criteria in this study. There were 68 trials which had complete exclusion of any autoimmune disease in patients. In addition, 13 trials excluded active autoimmune disease and 87 trials excluded active autoimmune disease requiring treatment. The remaining 37 trials had undefined exclusion.  Studies that had larger enrollment of patients with autoimmune diseases were largely in industry. The complete exclusion of patients with autoimmune diseases has decreased recently. CONCLUSION: Exclusion of patients with active autoimmune disease requiring treatment was one of the common exclusion criteria found.  Strict exclusion of patients with autoimmune diseases has been decreasing over the years.

Impact of Liver Metastasis on First-Line Immunotherapy in Stage IV Non-Small Cell Lung Cancer.

Background: Immunotherapy has become a key component of systemic therapy in stage IV non-small cell lung cancer (NSCLC). However, there have been conflicting reports of its efficacy in patients with liver metastasis (LM). Methods: Using National Cancer Database (NCDB), patients who have been diagnosed and treated at Commission on Cancer- participating US institutions were screened for analysis. Selection criteria included clinical stage IV NSCLC, available cTNM stage information, overall survival (OS) with at least 1 month, and diagnosis between 2015 and 2017. They were grouped based on status of LM as well as use of immunotherapy. Clinical characteristics were collected and their association with LM/immunotherapy was analyzed. Impact of immunotherapy on OS was examined according to LM status. Propensity score matching (PSM) analysis was also conducted. Results: A total of 83,479 including 18,497 LM-positive and 64,982 LM-negative patients met the study criteria. Presence of LM was associated with a number of clinical variables such as younger age, male sex, and chemotherapy. OS in patients with LM was significantly worse than that in those without LM (median OS, 5.0 vs. 8.8 months; hazard ratio (HR), 1.46; log-rank, P < 0.0001). Significant OS benefit from immunotherapy was observed in both LM-positive (median OS, 4.1 vs. 9.0 months; HR, 0.62; P < 0.0001) and negative groups (median OS, 7.2 vs. 15.6 months; HR, 0.64; P < 0.0001). Conclusion: Immunotherapy benefited similarly to the survival of metastatic NSCLC patients regardless of with or without LM. Further research to validate the result would be warranted.

Efficacy of immune checkpoint inhibitors in younger patients with non-small cell lung cancer.

PURPOSE: Because patients younger than 40 years are rarely enrolled in clinical trials in non-small cell lung cancer (NSCLC), their survival benefit of immune checkpoint inhibitors (ICIs) needs to be clarified. METHODS: The National Cancer Database was queried for patients who were diagnosed with stage IV NSCLC between 2016 and 2018. ICIs were administered in the first-line setting. The overall survival (OS) of patients with stage IV NSCLC according to the receipt of ICIs was compared in different age groups (< 40, 40-49, 50-59, 60-69, 70-79, and ≥ 80 years). Multivariate analyses identified the clinical characteristics predictive of OS. Propensity score matching (PSM) was conducted to reduce the biases arising from clinical characteristics. RESULTS: This study included 126,476 patients with stage IV NSCLC. In univariate analysis, ICI treatment was not associated with a survival benefit in patients younger than 40 years with stage IV NSCLC relative to their ICI-naïve counterparts after PSM (median OS: 24.2 months vs. 24.0 months, hazard ratio [HR] = 1.01, 95% confidence interval [CI] = 0.81-1.27, P = 0.9031). Multivariate analysis revealed that ICI use was not an independent predictor of OS in patients with stage IV NSCLC < 40 years old (HR = 0.96, 95% CI = 0.76-1.21, P = 0.7230). Sequential improvement of the HR was observed with increasing age. CONCLUSION: Our study suggested a poor survival benefit of ICIs in stage IV NSCLC patients younger than 40 years old, which should be validated in prospective studies.

Lymph node dissections and survival in sublobar resection of non-small cell lung cancer ≤ 20 mm.

BACKGROUND: A randomized trial of lobectomy versus segmentectomy for small-sized (≤ 20 mm) non-small cell lung cancer (NSCLC) showed that patients who had undergone segmentectomy had a significantly longer overall survival (OS) than those who had lobectomy. More attention is needed regarding the required extent of thoracic lymphadenectomy in patients with small-sized NSCLC who undergo sublobar resection. METHODS: The National Cancer Database was queried for patients with clinically node-negative NSCLC ≤ 20 mm who had undergone sublobar resection between 2004 and 2017. OS of NSCLC patients by the number of lymph node dissections (LNDs) was analyzed using log-rank tests and Cox proportional hazards model. The cutoff value of the LNDs was set to 10 according to the Commission on Cancer's recommendation. RESULTS: This study included 4379 segmentectomy and 23,138 wedge resection cases. The sequential improvement in the HRs by the number of LNDs was evident, and the HR was the lowest if the number of LNDs exceeded 10. Patients with ≤ 9 LNDs had a significantly shorter OS than those with ≥ 10 LNDs (hazard ratio [HR] 1.50, 95% confidence interval [CI] 1.40-1.61, P < 0.0001). Multivariable analysis revealed that performing ≤ 9 LNDs was an independent factor for predicting OS (HR for death: 1.34, 95% CI 1.24-1.44, P < 0.0001). These results remained significant in subgroup analyses by the type of sublobar resection (segmentectomy, wedge resection). CONCLUSIONS: Performing ≥ 10 LNDs has a prognostic role in patients with small-sized NSCLC even if the resection is sublobar.

Induction Immunotherapy Followed by Thoracic Radiation without Chemotherapy in Unresectable Stage III Non-Small Cell Lung Cancer: A Case Series.

OBJECTIVE: Although concurrent chemoradiation has been the standard of care for unresectable stage III non-small cell lung cancer (NSCLC) due to increased survival and decreased disease progression, patients with poor performance status cannot tolerate chemotherapy toxicity well. Durvalumab, an immune checkpoint inhibitor targeting the programmed death receptor-1 (PD-1) / programmed death-ligand 1 (PD-L1) axis, demonstrated efficacy as maintenance therapy after definitive chemoradiation. However, the role of immunotherapy in those who cannot tolerate chemoradiation is unclear. METHODS: This retrospective case series reports adult patients with PD-L1-expressing stage III NSCLC diagnosed at Parkview Cancer Institute from 2019-2021 and treated initially with pembrolizumab followed by sequential consolidation chest radiation (CXRT) without cytotoxic chemotherapy. RESULTS: Four cases of stage IIIA squamous cell carcinoma were disease-controlled by this approach, with two partial and one complete response. One case of stage IIIC adenocarcinoma had progressive disease with brain metastasis prior to CXRT. CONCLUSION: This case series suggests that pembrolizumab with sequential CXRT may be beneficial for stage III NSCLC patients with high PD-L1 expression, but additional studies are needed to confirm this hypothesis.

Adjuvant radiation therapy improves survival in stage IIIA (N2) non-small cell lung cancer with persistent N2 disease after neoadjuvant chemotherapy.

OBJECTIVES: Role of adjuvant radiation therapy in stage III (N2) non-small cell lung cancer has been controversial over the decades. Recent large, randomized trials have demonstrated that adjuvant radiation did not improve overall survival or disease-free survival; however, the trials either excluded or enrolled very few cases that have undergone neoadjuvant chemotherapy. Role of adjuvant radiation after neoadjuvant chemotherapy remains unclear. Whether the use of adjuvant radiation is associated with improved overall survival in those who have received neoadjuvant chemotherapy, especially in a subgroup of patients with persistent N2, is unknown. MATERIALS AND METHODS: Patients with clinical stage III (N2) non-small cell lung cancer diagnosed from 2004 through 2017 were queried to National Cancer Database. Eligibility criteria included completely resected (R0), pathological diagnosis, neoadjuvant multi-agent chemotherapy, information regarding post-surgical N2 status (persistent versus downstaged to pN0-1), adjuvant radiation (45 Gy+ versus none), and American Joint Commission on Cancer staging version (6th versus 7th). Those who have received neoadjuvant radiation with any dose or adjuvant radiation with less than 45 Gy total dose were excluded. Kaplan-Meier and log-rank tests were used for survival analyses. Propensity-score matching analysis was used for validation. All statistical analyses were two-sided, and p < 0.05 was required for statistical significance. RESULTS: A total of 1,855 patients met the eligibility criteria for analysis. In the overall cohort, there was a significant difference in overall survival between persistent N2 (Cohort P: N = 854, median survival 50.7 months) and downstaged N (Cohort D: N = 1,001, median survival 82.7 months). The use of adjuvant radiation showed a non-significant detrimental effect in overall survival in the overall and Cohort D (univariate p-values 0.27 and 0.077, respectively); however, both univariate and multivariate analyses demonstrated a significant improvement in overall survival in Cohort P (p = 0.004 and 0.028, respectively). These findings are also verified by propensity-score matching analysis (p = 0.0347). CONCLUSIONS: This large-scale retrospective analysis suggests that adjuvant radiation may still have a role in persistent N2 disease after neoadjuvant chemotherapy. Further investigations are warranted.

Clinical impact of number of lymph nodes dissected on postoperative survival in node-negative small cell lung cancer.

Objectives: Small cell lung cancer (SCLC) is a lethal histologic subtype of lung cancer. Although the Commission on Cancer recommends pathological examination of at least 10 lymph nodes dissected (LNDs) for resected early-stage non-small cell lung cancer, its survival benefit of LNDs in patients with early-stage SCLC is unknown. Methods: The National Cancer Database was queried for SCLC patients with clinical stage I-II and clinical N0, NX disease per AJCC 7th edition who had undergone lobectomy between 2004 and 2017. Overall survival of SCLC patients by the number of LNDs was compared using Log-rank tests. Univariate and multivariable Cox proportional hazards analyses were performed. Results: In total, 688 (42%), 311 (20%), 247 (16%), 196 (12%), 126 (8%), and 36 (2%) of 1,584 patients with early-stage SCLC had ≥10, 7-9, 5-6, 3-4, 1-2, and 0 LNDs, respectively. The sequential improvement in the HRs was no longer evident if the number of LNDs exceeds 4. Patients with ≥3 LNDs (n = 1,422) had a significantly longer overall survival than those with <3 LNDs (n = 162) (hazard ratio for death: 0.76, 95% confidence interval: 0.62-0.94, P = 0.0087). Multivariate analysis revealed that ≥3 LNDs was an independent factor for predicting overall survival (hazard ratio for death: 0.76, 95% confidence interval: 0.61-0.93, P = 0.0083). Conclusions: Although we are reluctant to recommend a definitive "optimal number" of LNDs, our findings suggest the prognostic and therapeutic roles for performing ≥3 LNDs in patients with early-stage SCLC who undergo lobectomy.

Advances in the Treatment of Mucoepidermoid Carcinoma.

Mucoepidermoid carcinoma (MEC) represents 10-15% of salivary neoplasms. Due to their low incidence, it is challenging to conduct clinical trials and develop treatment guidelines. Although surgery is the most common approach for a resectable tumor, various treatment options such as chemotherapy, radiotherapy, and immunotherapy have been investigated. There is a need to implement a standardized treatment protocol to effectively manage MEC as it is a common histological subtype. Furthermore, it has become essential to assess chromosomal and genetic abnormalities recently identified with MEC, including alterations of CDKN2A, TP53, CDKN2B, BAP1, etc. These mutations are involved in the transformation of low-grade tumors to high-grade tumors, presenting a vital tool for evaluating the aggressive behavior of this carcinoma. Detailed immunohistochemical and translocation studies can help develop targeted therapies and monitor treatment response. Therefore, biomarker-driven research will immensely improve the outcome, especially in advanced cases. Based on thorough histology and chromosomal translocations, a more personalized treatment plan can improve the overall disease outcome. The purpose of this article is to elaborate on the current treatment advancements, particularly chemotherapy and targeted therapy, as an effective treatment modality for the management of MEC and highlight the comparison with traditional treatment approaches.

Role of Immunotherapy in Stage IV Large Cell Neuroendocrine Carcinoma of the Lung.

BACKGROUND: Despite approvals of immune checkpoint inhibitors in both small cell and non-small cell lung cancers, the role of immunotherapy in large cell neuroendocrine carcinoma (LCNEC) in lung is undefined. METHODS: Using the National Cancer Database (NCDB), Stage IV lung LCNEC cases diagnosed from 2014 to 2016 were analyzed. Information regarding cancer treatment was limited to first course of therapy, including surgery for primary lesion, radiation, chemotherapy, and immunotherapy. Survival analysis was performed using Kaplan-Meier curves and Log-rank tests. Cox proportional hazard model was used for multivariate analysis. RESULTS: Among 661 eligible cases, 37 patients were treated with immunotherapy. No significant association between use of immunotherapy and clinical demographics was observed except for use of chemotherapy (p=0.0008). Chemotherapy was administered in 34 (92%) and 406 (65%) in immunotherapy and non-immunotherapy groups, respectively. Use of immunotherapy was associated with improved overall survival (Log-rank p=0.0018). Landmark analysis in the immunotherapy group showed 12 and 18-month survivals of 34.0% and 29.1%, respectively, whereas those in the non-immunotherapy group were 24.1% and 15.0%, respectively. Multivariate analysis demonstrated that female sex (HR=0.79, p=0.0063), liver metastases (HR=0.75, p=.0392), surgery (HR= 0.50, p <0.0001) use of chemotherapy (HR= 0.44, p <0.0001), and use of immunotherapy (HR=0.64, p=0.0164) had statistical significance. Propensity score matching in overall survival analysis showed a nonsignificant trend (p=0.0733) in favor of immunotherapy treatment. CONCLUSION: This retrospective study using NCDB suggests that use of immunotherapy may improve survival of LCNEC patients.

Role of thoracic radiation in extensive stage small cell lung cancer: a NCDB analysis.

Prognosis of extensive stage small cell lung cancer (ES-SCLC) remains poor. Previous randomized trials suggested consolidation chest radiation (CXRT) has a modest survival benefit; however, its role in subgroups of ES-SCLC, especially ipsilateral pleural effusion (IPE), is unknown. Using National Cancer Database (NCDB), 283,347 ES-SCLC cases diagnosed between 2004 and 2017 were screened. Eligible cases must have been staged with 7th edition of staging system and have information about clinical T and N stage, and minimum follow-up of one month. Role of CXRT was examined in M1a, M1b, and IPE subgroups. Surveillance, Epidemiology, and End Results Program (SEER) was analyzed as independent validation. Univariate, multivariate analyses were conducted with cox proportional hazard model. A P value < 0.05 was considered as statistically significant. A total of 36,762 were analyzed. In both M1a and IPE groups, use of CXRT was significantly associated with younger age, female sex, non-academic institution, and clinical T stage. Both univariate and multivariate analyses showed that use of CXRT demonstrated significantly longer overall survival in all the groups, with lower hazard ratios in M1a and IPE groups than M1b (univariate hazard ratio 0.62, 0.56, and 0.72, respectively). Propensity score analysis of IPE group showed the survival advantage with hazard ratio of 0.54. Use of SEER data validated its survival advantage of CXRT in IPE group. This retrospective database analysis suggests M1a and IPE subgroups have more survival benefit of CXRT than M1b subgroup. Further studies are warranted to confirm the hypothesis.

Prognostic impact of chronological age on efficacy of immune checkpoint inhibitors in non-small-cell lung cancer: Real-world data from 86 173 patients.

Immune checkpoint inhibitors (ICIs) have become standard pharmacological therapies in patients with non-small-cell lung cancer (NSCLC). Because elderly patients with NSCLC are often excluded from clinical trials as a result of lower functional capacity or comorbidities, the prognostic impact of chronological age on the efficacy of ICIs is unclear. The National Cancer Database was queried for stage IV NSCLC patients between 2014 and 2015. Associations between ICI therapy and clinical characteristics were assessed using chi-squared tests. Kaplan-Meier curves were compared using the log-rank test. A Cox proportional hazards model was used to identify clinical characteristics predictive of overall survival (OS). This study included 24 136 patients with stage IV NSCLC aged ≥75 years and 62 037 patients with stage IV NSCLC aged <75 years. Patients aged ≥75 years treated with ICIs had significantly longer OS than those not treated with ICIs (hazard ratio [HR] 0.61, 95% confidence interval [CI] 0.58-0.64, p < 0.0001). The corresponding HR in patients aged <75 years was 0.67 (95% CI 0.65-0.68, p < 0.0001). Cox modeling confirmed the survival benefit of ICI therapy in patients aged ≥75 years (HR for patients not receiving ICIs 1.63 [95% CI: 1.55-1.71], p < 0.0001). The corresponding HR in patients aged <75 years was 1.47 (95% CI 1.43-1.51, p < 0.0001). Chronological age does not appear to negatively impact the survival benefit of ICI therapy in patients with stage IV NSCLC according to this large real-world database analysis.

Prognostic Impact of Single and Multiple Descriptors in Pathologically Staged T3N0M0 NSCLC.

INTRODUCTION: T components of the current eighth edition of lung cancer American Joint Commission on Cancer (AJCC) staging assignment include size of primary tumor and others such as chest wall invasion. The role of the presence of multiple T3 descriptors in prognosis remains unknown. METHODS: Using the National Cancer Database and the AJCC seventh edition, pathologically staged (R0) N0M0 NSCLC cases diagnosed in 2010 to 2016 were analyzed. The selected cases had primary size larger than 5 cm or staged as T3 by the AJCC seventh edition despite the size of less than 5 cm. T3 descriptor status according to the eighth edition was defined as single descriptor ("T3-single") with primary size of 5 to 7 cm or size less than 5 cm and T3 based on the seventh edition ("T3-other") or multiple descriptor ("T3-multi") with presence of both descriptors. Survival analysis was performed with validation of multivariate analyses. RESULTS: Of the 108,632 surgically resected pathologically staged N0M0R0 NSCLC cases, 9931 met the following criteria: 8955 as T3-single (4381 as T3-size, 4574 as T3-other) and 884 as T3-multi. Univariate and multivariate analyses revealed that T3-multi had significantly worse overall survival than T3-single with a median survival of 37.3 versus 69.3 months, respectively. Propensity score matching analysis validated the statistical significance. Exploratory analysis also revealed that the survival of the T3-multi group is similar to that of the T4 groups. CONCLUSIONS: Our retrospective analysis using the National Cancer Database suggests that prognosis of patients with multiple T3 descriptors is substantially worse than those with single descriptors. Further research may be required to accurately define the prognosis of NSCLC for future staging update.