Augmenting control arms with real-world data for cancer trials: Hybrid control arm methods and considerations

Background

Hybrid controlled trials with real-world data (RWD), where the control arm is composed of both trial and real-world patients, could facilitate research when the feasibility of randomized controlled trials (RCTs) is challenging and single-arm trials would provide insufficient information.

Methods

We propose a frequentist two-step borrowing method to construct hybrid control arms. We use parameters informed by a completed randomized trial in metastatic triple-negative breast cancer to simulate the operating characteristics of dynamic and static borrowing methods, highlighting key trade-offs and analytic decisions in the design of hybrid studies.

Results

Simulated data were generated under varying residual-bias assumptions (no bias: HR_RWD = 1) and experimental treatment effects (target trial scenario: HR_Exp = 0.78). Under the target scenario with no residual bias, all borrowing methods achieved the desired 88% power, an improvement over the reference model (74% power) that does not borrow information externally. The effective number of external events tended to decrease with higher bias between RWD and RCT (i.e. HR_RWD away from 1), and with weaker experimental treatment effects (i.e. HR_Exp closer to 1). All dynamic borrowing methods illustrated (but not the static power prior) cap the maximum Type 1 error over the residual-bias range considered. Our two-step model achieved comparable results for power, type 1 error, and effective number of external events borrowed compared to other borrowing methodologies.

Conclusion

By pairing high-quality external data with rigorous simulations, researchers have the potential to design hybrid controlled trials that better meet the needs of patients and drug development.

Phase 2 of trametinib plus radioiodine in RAS-mutant and wild-type, radioiodine-refractory thyroid cancer (ETCTN9446)

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Background: A pilot study showed MEK inhibition could enhance radioiodine (RAI) avidity/efficacy in 5 RAS mutant (MUT), RAI-refractory (RAIR) thyroid cancer (TC) patients (pts). This phase 2 trial with the MEK 1/2 inhibitor trametinib (tram) was conducted to define the efficacy of this “redifferentiation” strategy in RAS MUT RAIR pts and separately in a RAS wild-type (WT) cohort. Methods: Recurrent and/or metastatic, RAIR TC pts w/ RAS MUT (Cohort A) or RAS WT (excluding BRAFV600E) (Cohort B) tumors were treated w/ tram (2 mg orally daily). Progressive disease or new/worsening disease-related symptoms was required for Cohort A pts. 124I PET was performed at baseline and the fourth week of tram. If the second 124I PET showed increased RAI avidity allowing > 2000 cGy to be delivered to a tumor w/ < 300 mCi 131I, pts were treated w/ 131I, guided by whole body and blood dosimetry. Tram was continued through 2 days s/p 131I. Pts who did not qualify for 131I from A/B were taken off study or continued tram alone (Cohort C). For Cohort A (n = 25), the two co-primary endpoints were objective response rate (ORR) and progression-free survival (PFS) 6 months (mos) s/p 131I. Observing either >4 pts w/ confirmed complete or partial response (cCR or cPR) or > 9 progression-free at 6 mos would be considered promising. Secondary endpoints were the proportion of pts w/ increased 124I, safety/tolerability of tram and thyroglobulin changes s/p RAI. The Cohort B primary endpoint was the proportion of pts whose tumors exceeded the lesional dosimetry threshold for 131I w/ tram. An exploratory endpoint for Cohort C was best objective response (BOR) w/ tram. Results: 25 RAS MUT pts enrolled in Cohort A. 23 had at least one (> 1) 124I (-) lesion, 21 had >1 124I (+) lesions and 4 pts had tumors lacking any 124I uptake. After tram treatment, 22/25 had increased 124I uptake; 17/23 had 124I (-) tumors convert positive. Importantly, 15/25 (60%) pts had increased 124I uptake and met lesional dosimetry criteria for 131I on tram. Of 14 pts treated w/ 131I, 8 (57%) achieved cPR, 3 (21%) stable disease (SD) and 3 (21%) progression of disease (PD) 6 mos s/p RAI, translating to 32% ORR and 44% 6-month PFS among all 25 pts. Cohort B had 9 pts (4 Class II BRAF alterations, 4 RET rearrangements, 1 STK11 mutation). 3/4 pts w/ Class II BRAF altered tumors qualified for 131I, leading to 1 cPR, 2 SD 6 mos s/p 131I. 1/4 pts w/ RET rearranged tumors qualified for 131I, producing SD at 6 mos. The STK11 MUT pt did not have increased 124I uptake w/ tram. 7 131I-ineligible pts enrolled to continue tram (Cohort C). Two serious adverse events (grade 3 anemia [Cohort A], grade 3 ejection fraction decrease [Cohort C]) and 3 grade 1 blurred vision/decreased visual acuity AEs were related to tram. Conclusions: Trametinib enhanced RAI uptake/efficacy in a subset of RAS MUT and Class II BRAF altered tumors. Further study to define the efficacy and optimal application of this therapeutic strategy is warranted. Clinical trial information: NCT02152995.

Enhancing Radioiodine Incorporation in BRAF-Mutant, Radioiodine-Refractory Thyroid Cancers with Vemurafenib and the Anti-ErbB3 Monoclonal Antibody CDX-3379: Results of a Pilot Clinical Trial

Background: Oncogenic activation of mitogen-activated protein kinase (MAPK) signaling is associated with radioiodine refractory (RAIR) thyroid cancer. Preclinical models suggest that activation of the receptor tyrosine kinase erbB-3 (HER3) mitigates the MAPK pathway inhibition achieved by BRAF inhibitors in BRAF^V600E mutant thyroid cancers. We hypothesized that combined inhibition of BRAF and HER3 using vemurafenib and the human monoclonal antibody CDX-3379, respectively, would potently inhibit MAPK activation and restore radioactive iodine (RAI) avidity in patients with BRAF-mutant RAIR thyroid cancer. Methods: Patients with BRAF^V600E RAIR thyroid cancer were evaluated by thyrogen-stimulated iodine-124 (¹²⁴I) positron emission tomography-computed tomography (PET/CT) at baseline and after 5 weeks of treatment with oral vemurafenib 960 mg twice daily alone for 1 week, followed by vemurafenib in combination with 1000 mg of intravenous CDX-3379 every 2 weeks. Patients with adequate ¹²⁴I uptake on the second PET/CT then received therapeutic radioactive iodine (¹³¹I) with vemurafenb+CDX-3379. All therapy was discontinued two days later. Treatment response was monitored by serum thyroglobulin measurements and imaging. The primary endpoints were safety and tolerability of vemurafenib+CDX-3379, as well as the proportion of patients after vemurafenb+CDX-3379 therapy with enhanced RAI incorporation warranting therapeutic ¹³¹I. Results: Seven patients were enrolled; six were evaluable for the primary endpoints. No grade 3 or 4 toxicities related to CDX-3379 were observed. Five patients had increased RAI uptake after treatment; in 4 patients this increased uptake warranted therapeutic ¹³¹I. At 6 months, 2 patients achieved partial response after ¹³¹I and 2 progression of disease. Next-generation sequencing of 5 patients showed that all had co-occurring telomerase reverse transcriptase promoter alterations. A deleterious mutation in the SWItch/Sucrose Non-Fermentable (SWI/SNF) gene ARID2 was discovered in the patient without enhanced RAI avidity after therapy and an RAI-resistant tumor from another patient that was sampled off-study. Conclusions: The endpoints for success were met, providing preliminary evidence of vemurafenib+CDX-3379 safety and efficacy for enhancing RAI uptake. Preclinical data and genomic profiling in this small cohort suggest SWI/SNF gene mutations should be investigated as potential markers of resistance to redifferentiation strategies. Further evaluation of vemurafenib+CDX-3379 as a redifferentiation therapy in a larger trial is warranted (ClinicalTrials.gov: NCT02456701).

Trends in diagnosis and treatment of early breast cancer (eBC) in the United States (US) during the COVID-19 era

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Background: Recent studies have demonstrated a decline in cancer screening and diagnosis during the COVID-19 pandemic. This study explored trends in the diagnosis and management of eBC at a sample of cancer clinics across the US early on in the pandemic. Methods: Patients were selected from the Flatiron Health Research Database (FHRD), an electronic health record-derived de-identified database comprising approximately 280 US cancer clinics (̃800 sites of care). Eligible patients had an ICD code for breast cancer, at least two clinical encounters, and a confirmed eBC (Stage I-III) diagnosis from unstructured documents. Patients were selected into two cohorts based on diagnosis date: a) COVID-19 era cohort diagnosed between February 1, 2020 through June 30, 2020 and b) pre-COVID-19 era cohort diagnosed from February 1, 2019 through June 30, 2019. Descriptive statistics were used to assess diagnosis trends in each time frame. Initial treatment received following eBC diagnosis was categorized as surgery, radiation or systemic therapy and was compared between the two cohorts. Initial treatment modalities for each cohort were further stratified by clinical stage and biomarker subtype (HER2+, HR+/HER2-, triple negative [TN] or unknown). Results: A total of 278 and 253 patients were selected for the pre-COVID-19 era and COVID-19 era cohorts, with a median age at diagnosis of 65 and 64 years, respectively. A 35% decrease in the number of eBC diagnoses was observed in April/May 2020 compared to March 2020, yet this reduction in diagnoses was not observed during the equivalent months in the pre-COVID-19 era cohort. Compared to the pre-COVID-19 era, a greater proportion of patients diagnosed with eBC during the COVID-19 era initiated systemic therapy as their first treatment modality (16.5% vs 29.6%) including patients with HER2+ (27.5% vs. 60%), HR+/HER2- (13.5% vs. 24.9%) and TN (30.8% vs. 40.0%) disease. This trend was observed in patients with stage I (11.7% vs. 24.1%) or II (55.9% vs. 73.0%) but not in patients with stage III (81.2% vs. 77.3%) eBC. Notably, among patients with HR+/HER2- eBC who received systemic therapy as their first treatment, endocrine therapy was most commonly used in keeping with recent recommendations from professional societies due to COVID-related anticipated surgical delays. Conclusions: This study demonstrates that COVID-19 was associated with a decreased incidence of eBC which could be, at least in part, attributed to previously reported delays in routine screening and pandemic healthcare utilization. Further efforts are required to understand who was affected by these delays and the impact on cancer outcomes. Follow-up data are needed to understand if the observed trends in cancer screening and treatment persist and their impact on long-term cancer outcomes.

Quality of life in long-term survivors of advanced melanoma treated with checkpoint inhibitors

Background

Immune checkpoint inhibitors (CIs) have revolutionized treatment of advanced melanoma, leading to an emerging population of long-term survivors. Survivors’ quality of life (QOL) and symptom burden are poorly understood. We set out to evaluate symptom burden and QOL in patients with advanced melanoma alive more than 1 year after initiating CI therapy.

Methods

Cross-sectional surveys, accompanied by chart review of patients with advanced melanoma treated with CIs at Memorial Sloan Kettering Cancer Center, completed therapy, and were alive >1 year after treatment initiation. Surveys were administered between February and August 2018. Surveys included: European Organization for Research and Treatment of Cancer Quality of Life Questionnaire-Core 30, EuroQOL, items from Patient-Reported Outcomes version of the Common Terminology Criteria for Adverse Events and Fatigue Severity Scale.

Results

We included 90 patients. The most common CI regimens were ipilimumab plus nivolumab (53%) and pembrolizumab (41%); most patients (71%) were not treated in clinical trials. Median time from CI therapy initiation was 40 months and from last dose was 28 months. Fatigue was reported by 28%, with higher fatigue scores in women than men; 12% reported difficulty sleeping. Aching joints (17%) and muscles (12%) were fairly common. Level of functioning was generally high. Overall QOL was excellent though 40% reported ‘some or moderate’ problems with anxiety/depression and 31% with pain/discomfort.

Conclusions

After CI therapy, long-surviving advanced melanoma patients commonly report fatigue but otherwise have moderate symptom burden and good QOL. Ensuring appropriate symptom management will optimize clinical outcomes for these patients.

Letting the GENIE Out of Its Bottle: Examining the Potential of Real-World Clinicogenomic Data

In this issue, Smyth and colleagues investigate the natural history of AKT1-mutant metastatic breast cancer using the AACR Project GENIE, a novel research platform comprised of real-world, clinicogenomic data. A rare subset of tumors, AKT1-mutant breast cancers demonstrated similar clinical and demographic characteristics and overall survival as AKT1-wild-type tumors, but a longer duration of therapy on mTOR inhibitors.See related article by Smyth et al., p. 526.

Using electronic health record data to identify comparator populations for comparative effectiveness research

Electronic health records (EHRs) can define real world patient populations with high levels of clinical specificity, potentially addressing some of the shortcomings of other types of real world data (RWD) when informing decisions about the comparative effectiveness of medical technologies. An important but under-recognized concern for EHR-derived RWD, however, is that the rich clinical data permits creation of very homogenous subpopulations from the larger group of eligible patients, thereby reducing the representativeness of the cohort relative to clinical practice. In this article, we discuss the tradeoffs between choosing clinical specificity versus representativeness in population sampling for comparative effectiveness research. Using EHR-derived RWD, we provide an example in non-small cell lung cancer to illustrate the concepts, showing wide variation in outcomes among potential comparator cohorts. We close with several recommendations for selecting comparator populations from EHRs that address the balance between matching clinical guidelines and capturing practice variability in comparative effectiveness research.

The experience of financial toxicity among advanced melanoma patients treated with immunotherapy

Purpose To measure financial toxicity and explore its association with quality of life (QOL) in an emerging population of survivors: advanced melanoma patients treated with immunotherapy. Design Cross-sectional survey and medical record review. Sample 106 survivors (39% response). Median time since start of immunotherapy was 36.4 months (range: 14.2-133.9). Methods The Comprehensive Score for Financial Toxicity measured financial toxicity, and the EORTC-QLQ30 assessed QOL and functioning across five domains. Data were collected online, by phone, or in clinic. Findings: Younger patients (<65 years) reported higher financial toxicity (p < .001) than older patients. Controlling for age, financial toxicity was correlated with QOL (p < .001), financial difficulties (p < .001), and EORTC-QLQ30 functioning subscales. Conclusions Given the demonstrated association between financial toxicity and QOL, our study highlights the importance of addressing financial toxicity, particularly among patients receiving high-cost treatments. Implications for Psychosocial Providers: Providers should educate patients and their caregivers about cost-management techniques, link them with available resources, and provide psychosocial counseling to alleviate related distress.

First-line immune checkpoint inhibitor use in cisplatin-eligible patients with advanced urothelial carcinoma: a secular trend analysis

Aim: Standard first-line treatment of advanced urothelial cell carcinoma involves cisplatin-based chemotherapy, with carboplatin or immune checkpoint inhibitor therapy (ICI) reserved for cisplatin-ineligible individuals. Methods: Using a large de-identified electronic health record-derived database of patients with advanced urothelial cell carcinoma in the USA, we examined trends in utilization of first-line systemic therapies in cisplatin-eligible patients from 1 January 2015 to 31 March 2018. Results: Among 1181 cisplatin-eligible patients, the quarterly proportion who received first-line ICI increased from 1 to 42% (p_trend <0.001), while the proportion who received cisplatin-based chemotherapy decreased from 53 to 33% (p_trend = 0.018). Patients receiving ICI were older than those receiving cisplatin (median age: 75 vs 68). Conclusion: Our analysis suggests rising off-label ICI use in cisplatin-eligible individuals, potentially because of ICI's favorable toxicity profile.

Abstract 3303: Development and initial validation of a prognostic score based on structured data from EHRs

Introduction

Real world data (RWD) is increasingly used to supplement clinical trial data. Prognostic scores (PS) such as ECOG performance status (ECOG) are important for matching patient populations and assessing treatment impact, yet such PS are often missing from patient records or are embedded in physician narratives. An accurate PS that does not rely on physician assessment or data entry would have broad utility. We therefore undertook development of a PS based solely on structured data from RWD across numerous cancer diagnoses (the structured PS). We then sought initial validation of the structured PS in patients treated with checkpoint inhibitors (CIT).

Methods

Using the Flatiron Health electronic health record-derived database, we applied LASSO regression to develop the structured PS to predict for overall survival (OS) after starting any first-line (1L) cancer therapy. Data included laboratory values and vital signs from between 30 days before and 15 days after start of treatment as well as age. The structured PS was developed from ~39K patients with multiple myeloma, chronic lymphocytic leukemia or one of 8 solid tumor malignancies. We evaluated the structured PS using concordance, i.e., how often the score correctly predicts the relative OS of two randomly selected patients, on ~24K patients, comparing to a baseline based on age and ECOG, when available. We then measured the association of OS with the structured PS at start of 1L CIT in patients with five tumor types where 1L CIT is common.

Results

The concordance of the structured PS was 66%-73%, on average 6% higher than that of age and ECOG.

Table 1 shows by cancer type # of patients and median OS from 1L CIT for quartiles of the structured PS (NR=not reached).

Conclusion

A structured PS can be an important pan-tumor variable in investigations of OS using RWD, including for patients treated with first-line CIT.

OS from 1L CIT by quartiles of structured PSDiseasenQ1 median (95% CI) in monthsQ2 median (95% CI) in monthsQ3 median (95% CI) in monthsQ4 median (95% CI in months)Head and neck3704 (3-5)9 (7-12)14 (12-Inf)NR (NR-Inf)Melanoma16355 (4-6)20 (15-26)33 (22-Inf)NR (NR-Inf)Non-small cell lung cancer41714 (3-4)9 (8-10)14 (13-16)24 (21-29)Renal cell carcinoma2775 (3-7)23 (12-Inf)20 (13-Inf)NR (28-Inf)Urothelial cancer6122 (2-3)6 (4-7)9 (7-13)NR (15-Inf)

Note: This abstract was not presented at the meeting.

Citation Format: Daniel Backenroth, Josh D. Haimson, Neal J. Meropol, Shrujal S. Baxi. Development and initial validation of a prognostic score based on structured data from EHRs [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2019; 2019 Mar 29-Apr 3; Atlanta, GA. Philadelphia (PA): AACR; Cancer Res 2019;79(13 Suppl):Abstract nr 3303.

Phase 2 study of vascular endothelial growth factor trap for the treatment of metastatic thyroid cancer

BACKGROUND

Several multitargeted tyrosine kinase inhibitors (TKIs) have demonstrated activity in patients with thyroid cancer that is refractory to radioactive iodine (RAI). The antitumor effect is attributed at least in part to the ability of these TKIs to inhibit angiogenesis in these vascular tumors. Vascular endothelial growth factor (VEGF) Trap (VT) is a recombinantly produced fusion protein consisting solely of human sequences for VEGF receptors 1 and 2 extracellular domains and human immunoglobulin 1. Evaluating VT in patients with thyroid cancer is reasonable considering the activity observed with TKIs targeting VEGF.

METHODS

The current study was a single-institution, phase 2, Simon 2-stage design (21 to >41 patients) study based on the objective response rate and/or 6-month progression-free survival as the primary endpoints. Eligible patients were required to have progressive, RAI-refractory and/or [¹⁸ F]fludeoxyglucose-avid, recurrent and/or metastatic, nonmedullary, nonanaplastic thyroid cancer; disease that was measurable using Response Evaluation Criteria In Solid Tumors (RECIST) criteria; and adequate organ and bone marrow function. VT at a dose of 4 mg/kg intravenously was administered every 14 days.

RESULTS

A total of 40 patients were included in the analysis. Of these patients, 24 had papillary thyroid cancer, 2 had follicular thyroid cancer, and 11 had Hurthle cell thyroid cancer. The final 3 tumors were classified as poorly differentiated. There were no complete and/or partial responses noted; 34 patients achieved stable disease and 6 patients experienced disease progression as their best response. Of the 34 patients with stable disease, 16 remained on the study for >6 months and 6 patients remained on the study for >12 months. The median duration on treatment was 4.1 months (range, 0.6-30.8 months).

CONCLUSIONS

Unlike TKIs, which have shown responses in this setting, to the authors' knowledge there have been no responses observed with the use of single-agent VT to date. It does not appear to be a promising drug for the treatment of patients with thyroid cancer.

Organ dysfunction (dys) and clinical outcomes in patients (pts) treated with immune checkpoint inhibitors (ICIs)

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Background: ICIs (anti-PD-L1/PD-1/CTLA-4) are approved in multiple cancers. The impact of organ dys on the pharmacokinetics of ICIs is known, but associated clinical outcomes are not well characterized. We compared real-world (rw) clinical outcomes in ICI-treated pts by liver and renal function. Methods: This retrospective study used longitudinal, patient-level data from community practices in the Flatiron Health electronic-health record (EHR)-derived database. We included pts diagnosed with advanced cancers (NSCLC, renal cell, melanoma, gastric/esophageal, or head and neck) on or after 1/1/2011, treated with an ICI with follow-up through 12/31/2018 and with baseline liver or renal function results in the EHR ≤30 days prior to ICI start. Organ function was stratified as normal, mild, moderate, or severe dys based on NCI CTCAE. We computed unadjusted median estimates for rw time to treatment discontinuation (rwTTD) for any reason and overall survival (OS) across baseline groups using the Kaplan-Meier method. Results: Of 15,979 pts, we identified 12,978/12,840 pts with evaluable renal/liver function, respectively; median follow-up was 5.1 mos and median age was 69.0 yrs (IQR: 61.0, 76.0) for both. Most pts had NSCLC (69.4/69.0%), were men (60.1/60.0%), white (73.5/73.6%), and diagnosed at stage IV (58.7%/58.6%). Most ICI was given in 1st-line (42.3/42.1%) (outcomes in Table). Conclusions: Pts with categorically worse baseline liver function had progressively worse on-treatment outcomes, including shorter OS, which differed from trends in renal dys. Whether baseline dys is prognostic or predictive of ICI outcomes should be further investigated in addition to reasons for discontinuation. Clinical outcomes (unadjusted median times, mos [95% CI]) by organ function. [Table: see text]

Long-term symptom burden and quality of life in metastatic melanoma patients treated with checkpoint inhibitors

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Background: Patients with metastatic melanoma (MMel) who achieve durable long-term responses to checkpoint inhibitors (CI) represent a new type of cancer survivor, but their long-term quality of life (QOL) is poorly described. We measured symptom burden and long-term QOL in MMel patients treated with CIs at Memorial Sloan Kettering Cancer Center (MSK). Methods: Between February and August 2018 we performed a cross-sectional survey of adult patients with MMel treated with CI at MSK beginning at least 12 months prior to this study. Surveys were self-administered online using RedCap. We assessed patient treatment experience and QOL using the PRO-CTCAE bank, EORTC, EQ-5D, and Fatigue Severity Scale. We performed chart abstraction to assess extent of cancer burden, ECOG status, Charlson Comorbidity Index (CCI), concurrent medical conditions, and immune-related adverse events (irAEs) developing during or after treatment. For analysis, we dichotomized age (< 65 vs ≥65) and months from CI initiation (< 25 vs ≥25). Results: We enrolled 107 patients (39% survey response rate); 106 completed surveys. Participants were 57.0% male and 93.5% white, with median age 60.5 years (IQR: 51.1, 67.5 years). 79.4% had a CCI of 0 at start of CI; preexisting autoimmune disorders were rare. Median time since CI initiation was 36.4 months (range: 14.2, 133.9 months). Median length of CI treatment was 7.3 months (IQR: 2.1, 24.3 months); 15 patients were on treatment at the time of survey completion. Among those off treatment at the time of survey completion, median time off treatment was 27.1 months (IQR: 16.7, 40.4 months). The most common irAEs were rash (34.6%), colitis (24.3%), thyroiditis (19.6%), hepatitis (18.7%), and hypophysitis (13.1%). irAEs did not differ by age. Few patients reported symptoms at time of survey, most commonly aching joints (18%), fatigue (14%), aching muscles (13%), and difficulty sleeping (11%). Few (< 12%) had difficulty with physical, role, emotional, cognitive, or social functioning and almost none (1%) reported anxiety, depression or pain on the EQ-5D. QOL was excellent, with a median of 83.3% on the EQ-5D global health score and no differences based on toxicities or time from treatment. Conclusions: Long-term survivors of MMel patients report few burdensome symptoms after CI therapy and have excellent QOL.

Vemurafenib Redifferentiation of BRAF Mutant, RAI-Refractory Thyroid Cancers

CONTEXT

BRAFV600E mutant thyroid cancers are often refractory to radioiodine (RAI).

OBJECTIVES

To investigate the utility and molecular underpinnings of enhancing lesional iodide uptake with the BRAF inhibitor vemurafenib in patients with RAI-refractory (RAIR).

DESIGN

This was a pilot trial that enrolled from June 2014 to January 2016.

SETTING

Academic cancer center.

PATIENTS

Patients with RAIR, BRAF mutant thyroid cancer.

INTERVENTION

Patients underwent thyrotropin-stimulated iodine-124 (124I) positron emission tomography scans before and after ~4 weeks of vemurafenib. Those with increased RAI concentration exceeding a predefined lesional dosimetry threshold (124I responders) were treated with iodine-131 (131I). Response was evaluated with imaging and serum thyroglobulin. Three patients underwent research biopsies to evaluate the impact of vemurafenib on mitogen-activated protein kinase (MAPK) signaling and thyroid differentiation.

MAIN OUTCOME MEASURE

The proportion of patients in whom vemurafenib increased RAI incorporation to warrant 131I.

RESULTS

Twelve BRAF mutant patients were enrolled; 10 were evaluable. Four patients were 124I responders on vemurafenib and treated with 131I, resulting in tumor regressions at 6 months. Analysis of research tumor biopsies demonstrated that vemurafenib inhibition of the MAPK pathway was associated with increased thyroid gene expression and RAI uptake. The mean pretreatment serum thyroglobulin value was higher among 124I responders than among nonresponders (30.6 vs 1.0 ng/mL; P = 0.0048).

CONCLUSIONS

Vemurafenib restores RAI uptake and efficacy in a subset of BRAF mutant RAIR patients, probably by upregulating thyroid-specific gene expression via MAPK pathway inhibition. Higher baseline thyroglobulin values among responders suggest that tumor differentiation status may be a predictor of vemurafenib benefit.

Real-world trends in first-line checkpoint inhibitor use (CPI) in advanced urothelial cell carcinoma (aUC)

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Background: Standard first-line treatment of aUC is cisplatin-based chemotherapy, with carboplatin-based chemotherapy or CPI reserved for cisplatin-ineligible individuals. However, given their favorable toxicity profile, there may be an indication drift of first-line CPI into cisplatin-eligible patients, despite no approved indication in this population. Methods: Using the Flatiron Health Database, a nationally representative electronic medical record-based dataset, we examined real-world prescribing patterns of first-line systemic therapies among 2090 patients with aUC diagnosed between the first quarter (q) of 2015 and 2018q1. Our analysis of cisplatin-eligible individuals excluded patients with pre-treatment (1) Eastern Cooperative Oncology Group performance status (ECOG PS) ≥ 2, (2) creatinine ≥ 1.5 mg/dL, or (3) diagnostic codes for chronic renal failure, congestive heart failure, hearing loss, or peripheral neuropathy. We used nonparametric tests of trend to describe first-line CPI and chemotherapy use over time. Results: Between 2015 and 2018, the quarterly proportion of patients who received first-line CPI increased from 1.4% to 43%, while the proportion who received platinum-based chemotherapy decreased from 89% to 56% (ptrend< 0.001) Similarly, among cisplatin-eligible patients (n = 1181), the proportion of first-line CPI users increased from 1.0% in 2015q4 to 42% in 2018q1 (ptrend= 0.001), while the proportion of first-line cisplatin users fell from 53% in 2015q4 to 33% in 2018q1 (ptrend= 0.018). First-line CPI initiators were older (median age 76 vs 71) and had worse performance status (PS ≥ 2 17.8% vs 11.4%) relative to platinum initiators (Table). Conclusions: Our analysis suggests a dramatic rise in first-line CPI use, even in patients who may be cisplatin-eligible, for whom first-line CPI is not evidence-based. [Table: see text]

Automating Treatment Summary Development Using Electronic Billing Information: A Pilot Study of Survivors of Head and Neck Cancer

PURPOSE

Although the provision of a treatment summary (TS) is a quality indicator in oncology, routine delivery of TSs remains challenging. Automatic TS generation could facilitate use, but data on accuracy are lacking in complex cancers such as head and neck cancer (HNC). We developed and evaluated an electronic platform to automate TS generation for HNC.

METHODS

The algorithms autopopulated TSs using data from billing records and an institutional cancer registry. A nurse practitioner used the medical record to verify the accuracy of the information and made corrections electronically. Inaccurate and missing data were considered errors. We described and investigated reasons for errors in the automatically generated TSs.

RESULTS

We enrolled a heterogeneous population of 43 survivors of HNC. Using billing data, the information on primary site, lymph node status, radiation, and chemotherapy use was accurate in 93%, 95%, 93%, and 95% of patients, respectively. Billing data captured surgery accurately in 77% of patients; once an omitted billing code was identified, accuracy increased to 98%. Chemotherapies were captured in 90% of patients. Using the cancer registry, month and year of diagnosis were accurate in 91% of cases; stage was accurate in 28% of cases. Reprogramming the algorithm to ascertain clinical stage when pathologic stage was unavailable resulted in 100% accuracy. The algorithms inconsistently identified radiation receipt and treating physicians from billing data.

CONCLUSION

It is feasible to automatically and accurately generate most components of TSs for HNC using billing and cancer registry data, although clinical review is necessary in some cases.

Long-term quality of life in older patients with HPV-related oropharyngeal cancer

BACKGROUND

We explored if age affects quality of life (QOL) in survivors of locally advanced human papillomavirus (HPV)-related oropharyngeal squamous cell carcinoma (SCC).

METHODS

In a cross-sectional survey of 185 patients, at least 12 months from radiation, we evaluated generic (EuroQOL-5D questionnaire [EQ-5D]) and head and neck specific (European Organisation for Research and Treatment of Cancer Quality of Life Questionnaire-Head and Neck 35-questions [EORTC-QLQ-H&N35]) QOL questionnaires and compared differences between younger (<65) and older (≥65) patients.

RESULTS

The median age was 57.0 years (range 25-77 years), and 31 patients (16.8%) were ≥65 years old. There was no significant difference in EQ-5D global QOL scores by age (P = .53). Patients ≥65 years reported more immobility (P < .01), problems with social eating (P < .0001), and coughing (P < .01). Patients ≥65 years were not more likely to ever require a gastrostomy (P = .24) but were more likely to remain gastrostomy-dependent at the time of the survey (P = .02).

CONCLUSION

Despite similar generic QOL, older survivors may have more mobility problems and issues with social eating compared with younger survivors deserving of further evaluation.

A phase II study of temsirolimus added to low-dose weekly carboplatin and paclitaxel for patients with recurrent and/or metastatic (R/M) head and neck squamous cell carcinoma (HNSCC)

Background

Activating events along the PI3K/mTOR pathway are common in head and neck squamous cell carcinomas (HNSCC), and preclinical studies suggest additive or synergistic effects when combining mTORC1 inhibitors with carboplatin and paclitaxel chemotherapy.

Patients and methods

In this single-institution phase II study, the combination of temsirolimus 25 mg, carboplatin AUC 1.5, and paclitaxel 80 mg/m2 administered on days 1 and 8 of a 21-day cycle was evaluated in 36 patients with recurrent and/or metastatic (R/M) HNSCC. The primary end point was objective response rate after two cycles of treatment. Secondary end points include the safety and tolerability profile and overall survival. Correlative studies with exome mutational analysis were performed in pre-treatment biopsy samples from 21 patients.

Results

Fifteen (41.7%) patients had an objective response, which were all partial responses, and 19 (52.3%) patients had stable disease as best response. The two patients who were designated as 'non-responders' were removed from study prior to two cycles of treatment, but are included in the efficacy and safety analyses. The median duration on study was 5.3 months and the median progression-free survival and overall survival were 5.9 months (95% confidence interval, 4.8-7.1) and 12.8 months (95% confidence interval, 9.8-15.8), respectively. The most common grade 3 and 4 adverse events were hematologic toxicities. Three (3.8%) patients developed neutropenic fever on study. Three of four patients with PIK3CA mutations experienced tumor regressions, and responses were also seen in patients with other genetic alterations in the PI3K/mTOR pathway.

Conclusion

The combination of temsirolimus with low-dose weekly carboplatin and paclitaxel appears to have meaningful clinical efficacy in the treatment of R/M HNSCC. This regimen has a relatively high response rate compared to other treatments evaluated in R/M HNSCC, and potential associations with genetic alterations in the PI3K/mTOR pathway should be further explored.

Tailored survivorship care plans for head and neck cancer patients

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Background: Survivorship care plans SCPs typically include generic advice for cancer surveillance, management of late effects (LEs), wellness recommendations (WRs), and cancer screening. We developed a platform called HN-STAR that uses electronic patient-reported outcomes (ePROs) and evidence-based management guidelines to generate tailored SCPs for head and neck cancer survivors (HNCSs), a population particularly vulnerable to various LEs. We surveyed HNCSs and their primary care providers (PCPs) regarding the SCP to assess its acceptability and usefulness. Methods: HNCSs at 2 cancer hospitals used HN-STAR. Prior to a routine clinic visit, HNCSs used a validated ePRO measure (PRO-CTCAE) to report 22 physical LEs and other measures to assess wellness. Based on the visit discussion, HN-STAR generated an SCP that included a treatment summary, WRs, and LE management plans. HNCSs indicated their perceptions of the SCP and intentions to adhere to WR and LE management recommendations. PCPs reported on the SCP utility and their comfort in managing WRs and LEs. Results: 47 HNCSs completed surveys (mean 5.4 yrs. from treatment completion). Most were white (89%), male (85%), had an oropharynx tumor (58%), and received multimodality therapy (81%). 51% experienced at least 9 of the 22 LEs in the last month (mean 8.2/person). 91% of HNCSs felt the SCP was easy to follow. 98% intended to follow recommendations for LEs management and 98% reported they would refer back to the SCP. 87% said they plan to share the SCP with a PCP. 23 PCPs completed the survey. 95% were satisfied with the SCP and 95% reported they would like to have one for every cancer patient. PCPs expressed varying levels of comfort in managing specific LEs of head and neck cancer (30-80%). Conclusions: Among HNCSs, an automatically generated SCP that was tailored to their WRs and LEs was acceptable, was trusted, and provided recommendations they intended to follow. PCPs found the SCP useful, and SCPs may help improve their comfort with LE management. Patient-centered SCPs that focus on existing LEs hold promise as a means to help survivors and PCPs manage survivorship issues.

OncoKB: A Precision Oncology Knowledge Base

PURPOSE

With prospective clinical sequencing of tumors emerging as a mainstay in cancer care, there is an urgent need for a clinical support tool that distills the clinical implications associated with specific mutation events into a standardized and easily interpretable format. To this end, we developed OncoKB, an expert-guided precision oncology knowledge base.

METHODS

OncoKB annotates the biological and oncogenic effect and the prognostic and predictive significance of somatic molecular alterations. Potential treatment implications are stratified by the level of evidence that a specific molecular alteration is predictive of drug response based on US Food and Drug Administration (FDA) labeling, National Comprehensive Cancer Network (NCCN) guidelines, disease-focused expert group recommendations and the scientific literature.

RESULTS

To date, over 3000 unique mutations, fusions, and copy number alterations in 418 cancer-associated genes have been annotated. To test the utility of OncoKB, we annotated all genomic events in 5983 primary tumor samples in 19 cancer types. Forty-one percent of samples harbored at least one potentially actionable alteration, of which 7.5% were predictive of clinical benefit from a standard treatment. OncoKB annotations are available through a public web resource (http://oncokb.org/) and are also incorporated into the cBioPortal for Cancer Genomics to facilitate the interpretation of genomic alterations by physicians and researchers.

CONCLUSION

OncoKB, a comprehensive and curated precision oncology knowledge base, offers oncologists detailed, evidence-based information about individual somatic mutations and structural alterations present in patient tumors with the goal of supporting optimal treatment decisions.

Phase 2 study evaluating the combination of sorafenib and temsirolimus in the treatment of radioactive iodine-refractory thyroid cancer

BACKGROUND

Patients with recurrent and/or metastatic, radioactive iodine-refractory thyroid carcinoma have limited treatment options. Sorafenib, an oral kinase inhibitor, is approved by the US Food and Drug Administration for the treatment of radioactive iodine-refractory thyroid carcinoma, although it demonstrated low response rates (12.2%) as a single agent in the first-line setting. The objective of the current study was to determine whether adding the mammalian target of rapamycin inhibitor temsirolimus to sorafenib could improve on these results.

METHODS

In this single-institution, phase 2 study, 36 patients with metastatic, radioactive iodine-refractory thyroid carcinoma of follicular origin received treatment with the combination of oral sorafenib (200 mg twice daily) and intravenous temsirolimus (25 mg weekly). The receipt of prior systemic treatment with cytotoxic chemotherapy and targeted therapy, including sorafenib, was permitted. The primary endpoint was the radiographic response rate.

RESULTS

The best response was a partial response in 8 patients (22%), stable disease in 21 (58%), and progressive disease in 1 (3%). Six patients were not evaluable for a response. Patients who had received any prior systemic treatment had a response rate of 10% compared with 38% of those who had not received prior systemic treatment. One of 2 patients with anaplastic thyroid cancer had an objective response. The progression-free survival rate at 1 year was 30.5%. The most common grade 3 and 4 toxicities associated with sorafenib and temsirolimus included hyperglycemia, fatigue, anemia, and oral mucositis.

CONCLUSIONS

Sorafenib and temsirolimus appear to be an active combination in patients with radioactive iodine-refractory thyroid carcinoma, especially in patients who received no prior treatment compared with historic data from single-agent sorafenib. Activity is also observed in patients who previously received sorafenib. This regimen warrants further investigation. Cancer 2017;123:4114-4121. © 2017 American Cancer Society.

Variation in use of postoperative chemoradiation following surgery for T1 and T2 oropharyngeal squamous cell carcinoma; National Cancer Database

BACKGROUND AND OBJECTIVES

Primary surgical treatment of patients with early T-classification (T1-T2) oropharyngeal squamous cell carcinoma (OPSCC) has increased. We sought to determine how often these patients receive postoperative chemoradiation (CRT).

METHODS

Patients with T1-T2 OPSCC in the National Cancer Database who underwent primary surgery were evaluated for receipt of postoperative CRT. Postoperative CRT use was examined among patients with high risk factors (positive margins and/or extracapsular spread [ECS]), intermediate risk factors (negative margins, no ECS, and either pT3-4 and/or N2-N3), and no apparent risk factors.

RESULTS

Of 4833 patients with T1-T2 OPSCC who underwent primary surgery, 43% had high risk pathologic factors, of whom only 63% received postoperative CRT. Another 31% had no apparent risk factors, of whom 16% nonetheless received postoperative CRT. On multivariable analysis, in addition to tumor and demographic factors, patients treated at community hospitals were more likely to receive postoperative CRT (O.R. 1.41 C.I. 1.18-1.87, P = 0.001).

CONCLUSIONS

Variation in postoperative CRT use indicates a lack of consensus and/or knowledge about its benefits and indications. Usage of postoperative CRT regardless of pathologic risk factors suggests an area where future efforts at implementation of best practices may be targeted.

Combination of dabrafenib (DAB)

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Background: BRAFV600E mutations (BRAFm) are the most common mutations in thyroid cancer. BRAF inhibitors are active in BRAFm melanoma, but there is less activity noted in BRAFm thyroid cancer. Preclinically, BRAF inhibitors inhibit BRAFm thyroid cancers only transiently due to activation of HER2/HER3, driven by a neuregulin-dependent autocrine loop. The addition of LAP, a HER2/HER3 kinase inhibitor, sensitizes the cell to growth suppression by BRAF inhibitors (Cancer Discov 5(3):520, 2013). A phase I study evaluating the combination of DAB, a BRAF inhibitor, and LAP was initiated to evaluate the safety and pharmacodynamic changes the combination. Methods: Eligibility included thyroid cancers with the presence of a BRAFV600E mutation. Any prior treatment was allowed. All patients received DAB 150 mg bid starting 2 weeks prior to LAP. Doses of daily lapatinib were escalated in a standard 3+3 design at (1) 750 mg; (2) 1250 mg; (3) 1500 mg. Toxicities, including Dose Limiting Toxicities (DLT), were noted only after both drugs were started. Patients (pts) removed before the start of LAP were not included in the analysis. Biopsies were done at baseline, after the start of DAB, and after the start of both DAB and LAP. Responses were defined using RECIST 1.1. Results: 15 evaluable pts were enrolled on the phase I portion of the study. Gender – 10/15 (67%) male; median age – 63 years; histology – differentiated thyroid cancer (DTC) 13 (87%), anaplastic thyroid cancer (ATC) 2 (13%); brain metastases – 4/15 (27%); prior tyrosine kinase inhibitor – 9/15 (54%). There was one DLT - Grade 5 event unlikely related to drugs in a pt with ATC. Grade 4 toxicities – 0. Grade 3 toxicities –lymphocytes (1). The partial response rate is 60%. The response rate in the DTC group is 69% (0% in ATC). One other pt came off treatment due to withdrawal of consent. Median progression-free survival is 15 months (range, 2-34+ months). Median follow up is 15 months. Translational studies are pending. Conclusions: The combination of DAB 150 mg bid and LAP 1500 mg daily was safe and well-tolerated. Furthermore, significant activity was noted, especially at the top dose level. Further investigation with this regimen is warranted. Clinical trial information: NCT01947023. [Table: see text]

Survivor feedback on a late effects-oriented survivorship care plan for head and neck cancer

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Background: Survivorship care plans (SCPs) typically include generic advice for the management of late effects (LEs) that can occur, rather than addressing LEs that the survivor actually has. We developed a platform called HN-STAR that uses electronic patient-reported outcomes (ePROs) and evidence-based LE management to generate a personalized SCP for survivors of head and neck cancer (HNC), a population vulnerable to various LEs. We assessed HNC survivors’ experiences with HN-STAR to ensure its acceptability and usefulness. Methods: Disease-free HNC survivors at two cancer hospitals used HN-STAR in conjunction with a routine survivorship visit. Prior to the visit, survivors used a validated ePRO measure (PRO-CTCAE) to report up to 22 physical LEs. Based on clinic visit discussions, HN-STAR generated an SCP that included a treatment summary and LE management plans. Survivors indicated their level of agreement to statements regarding the ease of use of the ePROs, content of the SCP, and intentions to adhere to LE management recommendations. Results: 47 survivors completed surveys (mean 5.4 years from treatment completion). Most were white (89%), male (85%), had an oropharynx tumor (58%), and received multimodality therapy (81%). More than half (51%) experienced at least 9 of the 22 LEs in the last 30 days (mean 8.2 per person). Most survivors reported that completing ePROs improved the discussions with their provider (98%), the quality of their care (96%), and their communication with their provider (98%). 91% agreed the SCP was the right length, and 98% agreed it was easy to follow. 98% intended to follow at least some of the recommendations for LEs management, and 98% reported feeling confident that they could follow the recommendations. The majority agreed that the SCP accurately summarized the clinic visit (98%), they would refer back to the SCP (98%), they trust the SCP (100%), and they plan to share the SCP with a primary care provider (87%). Conclusions: Among HNC survivors, an automatically generated SCP that was tailored to their LEs was acceptable, was trusted, and provided recommendations they intended to follow. Patient-centered SCPs that focus on existing LEs hold promise as a means to help survivors manage LEs.

Feasibility of incorporating patient reported outcomes (PROs) into routine care for oropharyngeal carcinoma (OPC)

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Background: We assessed the feasibility of using PROs as part of routine care to better understand the trajectory in quality of life (QOL) following treatment of OPC. Methods: The Memorial Sloan Kettering Cancer Center (MSK) head and neck disease management team (DMT) assembled a parsimonious paper survey composed of validated PRO measures (EORTC QLQ 30 and HN-35, Neck Dissection Impairment Index, Skindex-16, and COST-FACT) to assess QOL at baseline, immediately and 3 months post treatment. From Jan-May 2016, a DMT PRO coordinator identified patients with non-metastatic OPC and notified clinical teams to print the surveys to be completed in the waiting room. We assessed the feasibility of incorporating PROs into routine care across the DMT using this process by examining response rates (RR) and identifying potential barriers (i.e., regional site of treatment, number of treatment modalities, hospitalizations, demographic variables) to completing PROs. Results: Of 54 patients with non-metastatic OPC, 3 non-English speakers and 5 protocol patients were excluded. Median age was 61.3 years (43.8-78.4). Patients were mostly male (89%), married (74%) and presented with locally-advanced OPC (89%) due to HPV (89%). 89% received multimodality therapy (89%), of which 36 (88%) received chemoradiation, and nearly half (48%) were treated at MSK regional sites. The RR decreased substantially over time (Table 1). 2 patients died* and 17 patients were hospitalized within these 3 months. In bivariate analyses, no prespecified demographic or clinical barriers to completion of PROs were identified. On deeper investigation, decline in RR overtime resulted from not capturing change in scheduling, which occurs more frequently after treatment completion. Conclusions: Implementation of longitudinal PROs into routine care is feasible and generally acceptable by the patients, but requires a coordinated effort to sustain an acceptable RR. For future efforts, the project coordinator will use a portal messaging system to communicate directly with patients and use an electronic PRO format. [Table: see text]

A personalized approach using hypoxia resolution to guide curative-intent radiation dose-reduction to 30 Gy: A novel de-escalation paradigm for HPV-associated oropharynx cancers (OPC)

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Background: We conducted a pilot study using functional imaging to guide reduction in radiation (RT) to 30Gy with concurrent chemotherapy in patients with HPV+ OPC. Methods: 19 patients were enrolled prospectively from 7/2015-10/2016. Primary tumors were excised and analyzed for DNA repair foci ex-vivo. A pre-RT dynamic 18F-FMISO (fluoromisonidazole) PET was then used to assess tumor hypoxia (defined as > 1.2 tumor to muscle SUV ratio) in cervical lymph nodes. Patients without hypoxia on baseline or repeat scan done 5-10 days after initiation of chemoRT received 30Gy (57% reduction) over 3 weeks to the tumor bed and neck with 2 cycles of concurrent chemotherapy (high-dose cisplatin or carboplatin/5-FU). Patients with persistent hypoxia received the standard dose of 70Gy over 7 weeks with chemo. Neck dissection (ND) was done 4-months post chemoRT. Weekly DWI MRI, ctDNA, whole exome & RNA sequencing were performed. Results: 19 patients (11 tonsil, 5 BoT, 3 unknown primaries) were enrolled. Staging: 11 T1, 5 T2, 3 Tx; 5 N1, 3 N2a, 11 N2b; all M0. On pre-RT 18F-FMISO scans, 13 were positive and 6 were negative for hypoxia. Of the 12 intra-treatment 18F-FMISO scans (1 not done due to intermittent illness, this patient received 70Gy), 3 were positive and these patients received 70Gy chemoRT. 15 patients were de-escalated to 30Gy. To date, analysis showed complete pathologic response in 8 of 9 patients (all 15 expected to have ND by April 2017. The one positive case received only 1 cycle of cisplatin. To date, 18 of 19 patients (95%-6 pending ND) remain disease free. Correlative analysis with sequencing, DNA repair foci, ctDNA, and results from pathologic and intra-treatment imaging response will be presented. Conclusions: This is the first report of apersonalized approach to a major decrease in RT dosing for definitive treatment of HPV+ oropharyngeal carcinoma guided by patient-specific imaging-based treatment response. De-escalation to 30Gy informed by intra-treatment imaging for hypoxia appears feasible, safe and efficacious. A multi-center trial to validate these pilot results is planned. Clinical trial information: NCT00606294.

Phase Ib study of cetuximab + BYL719 + IMRT in stage III-IVB head and neck squamous cell carcinoma (HNSCC)

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Background: Activation of the PI3K/mTOR signaling pathway is common in HNSCC. PI3K inhibitors have been shown to enhance radiosensitivity. BYL719 is an α-specific PI3K inhibitor that is synergistic and efficacious when combined with cetuximab, an FDA-approved radiosensitizing agent in HNSCC. This study evaluates the addition of BYL719 to cetuximab and radiation in the treatment of locally advanced HNSCC. Methods: This is a single-institution, phase I study. Patients with Stage III-IVB HNSCC received cetuximab 400 mg/m2 IV loading dose prior to intensity modulated radiation therapy (IMRT), followed by 250 mg/m2 weekly infusions during IMRT. BYL719 was given orally during IMRT in 3 dose levels (DLs): 1) 200 mg, 2) 250 mg, and 3) 300 mg per day in a standard 3 + 3 dose escalation design. Results: 11 patients are evaluable; median age-60 years (36-73); Stage III-1, IVA-9, IVB-1; oropharynx primary-9, unknown primary-2; HPV-positive -10. 8 patients completed treatment. 3 patients were treated on DL 1 and 2 without a dose limiting toxicity (DLT). Both patients on DL 3 experienced a DLT of grade 3 mucositis. Related adverse events (AEs) of any grade experienced by all 8 patients include: mucositis, weight loss, and hyperglycemia. Related grade 3 and 4 AEs in at least 2 patients include: mucositis (4), dysphagia (4), and decreased lymphocyte count (2). An additional 3 patients have been enrolled onto DL 2 and are undergoing treatment. All other patients had a complete response (CR) on post-treatment PET (from 6/2015 - 9/2016) and remain free of disease. Of 6 patients with mutational analysis, 1 had an activating PIK3CA mutation associated with a rapid response on serial intra-treatment MRIs. Conclusions: BYL719 administered at DLs 200 mg or 250 mg oral daily with cetuximab and IMRT resulted in expected AEs of radiation-based treatment with cetuximab and tolerable class-related AEs of PI3K inhibitors. BYL719 300 mg oral daily exceeds the maximum tolerated dose; the phase II recommended dose is pending completion of expansion of DL 2. All patients who completed treatment had a CR. Further evaluation of the addition of BYL719 to the platinum-sparing regimen of cetuximab + IMRT in the treatment of locally advanced HNSCC is warranted. Clinical trial information: NCT02282371.

Quality of Cancer Surveillance Clinical Practice Guidelines: Specificity and Consistency of Recommendations

Importance

Primary care clinicians, who are increasingly responsible for caring for the growing population of cancer survivors, may be unfamiliar with appropriate cancer surveillance strategies. Clinical practice guidelines can inform cancer follow-up care and surveillance testing. Vague recommendations and inconsistencies among guidelines can lead to overuse and underuse of health care resources and have a negative impact on cost and quality of survivorship care.

Objective

To examine the specificity and consistency of recommendations for surveillance after active treatment across cancer guidelines.

Design, Setting, and Participants

Retrospective cross-sectional analysis of national cancer guidelines from North America and Europe published since 2010 addressing posttreatment care for survivors of the 9 most common cancers. We categorized surveillance modalities into history and physical examinations, tumor markers, diagnostic procedures (eg, colonoscopy), and imaging. Within each guideline, we classified individual recommendations into 5 categories: (1) risk-based recommendation, (2) recommendation for surveillance, (3) addressed but no clear recommendation, (4) recommendation against surveillance, or (5) cases in which surveillance was not addressed. We reviewed each surveillance recommendation for frequency and a stop date, evaluated consistency among guidelines, and analyzed associations between the organizations proposing the guidelines and recommendation characteristics.

Main Outcomes and Measures

Description of guideline recommendations for cancer surveillance.

Results

We identified 41 guidelines published between January 1, 2010, and March 1, 2016. Eighty-five percent of guidelines (35) were from professional organizations. Ambiguous recommendations (ie, modality not discussed or discussed without a clear recommendation) were present in 83% of guidelines (34), and 44% (18) recommended against at least 1 test. European guidelines were more likely than North American guidelines to contain ambiguous recommendations (100% vs 68%; P < .01). Recommendations commonly specified testing frequency (from 88% [14 of 16] for tumor markers to 92% [24 of 26] for procedures and/or imaging) but infrequently provided a definitive stop time. Cross-sectional imaging recommendations varied among guidelines for each cancer. For example, among breast cancer guidelines, surveillance computed tomographic scans were recommended against in 2, discussed without a clear recommendation in 1, and not addressed in 3 guidelines.

Conclusions and Relevance

Guidelines addressing the care of cancer survivors have low specificity and consistency. As guidelines continue to be revised, developers should clarify recommendations with simple, nonambiguous, definitive language for or against the use of specific tests to optimize care quality and resource utilization.

Pilot Study of a Web-based Decision Tool on Post-operative Use of Radioactive Iodine

Background: The Thyroid Cancer Care Collaborative developed a web-based clinical decision-making module (CDMM) to inform risk-adjusted decisions on post-thyroidectomy radioactive iodine (RAI) use in papillary thyroid cancer (PTC). Methods: In a pilot study, we evaluated the CDMM in 19 PTC cases representing low- (five), intermediate- (seven) and high-risk (seven) disease. Two PTC experts and 10 PTC physicians reviewed cases and assigned risk level and RAI recommendation. The experts used a standard approach while the others used the CDMM. We assessed agreement between responses using a weighted Kappa. Results: Between experts, risk-assignment was concordant in 100%, 57% and 86% of low-, intermediate- and high-risk cases, respectively. Between CDMM users, risk-assignment was concordant in 100%, 29% and 14% in low-, intermediate- and high-risk cases, respectively (p=0.01). CDMM-assigned risk agreed with the expert-assigned risk in 100%, 25% and 0% of low-, intermediate- and high-risk cases, respectively (Kappa=0.69). For RAI use, the experts agreed in 15 cases while CDMM users agreed in eight. On further analysis, interpretation of extrathyroidal extension and lymph node staging led to discrepancies with the CDMM. Conclusions: For a web-based CDMM to accurately inform appropriate use of RAI in PTC, standard pathological and surgical reports are necessary.

The Molecular Landscape of Recurrent and Metastatic Head and Neck Cancers: Insights From a Precision Oncology Sequencing Platform

Importance

Recurrent and/or metastatic head and neck cancer is usually incurable. Implementation of precision oncology for these patients has been limited by incomplete understanding of the molecular alterations underlying advanced disease. At the same time, the molecular profiles of many rare head and neck cancer types are unknown. These significant gaps in knowledge need to be addressed to rationally devise new therapies.

Objective

To illuminate the distinct biology of recurrent and metastatic head and neck cancers and review implementation of precision oncology for patients with advanced disease.

Design, Setting, and Participants

After exclusions, 151 patients with advanced, treatment-resistant head and neck tumors, including squamous cell carcinoma (HNSCC), adenoid cystic carcinoma (ACC), and other salivary and cutaneous cancers, whose tumors were sequenced between January 2014 and July 2015 at Memorial Sloan Kettering were recruited. Next-generation sequencing of tumors as part of clinical care included high-depth (median 600×) exonic coverage of 410 cancer genes and whole-genome copy number analysis.

Interventions

Next-generation sequencing of tumors and matched normal DNA.

Main Outcomes and Measures

Feasibility, the frequency of actionable molecular alterations, the effect on decision making, and identification of alterations associated with recurrent and metastatic disease.

Results

Overall, 151 patients (95 men and 56 women; mean [range] age, 61.8 [17-100] years) were included in the study. Next-generation sequencing ultimately guided therapy in 21 of 151 patients (14%) (13 of 53 [25%] of patients with HNSCC) by refining diagnoses and matching patients to specific therapies, in some cases with dramatic responses on basket studies. Molecular alterations were potentially actionable in 28 of 135 patients (21%). The genetic profiles of recurrent and metastatic tumors were often distinct from primary tumors. Compared to primary human papillomavirus (HPV)-positive tumors, many recurrent and metastatic HPV-positive tumors exhibited a molecular profile more similar to HPV-negative tumors, including enriched frequencies of TP53 mutation (3 of 20 tumors [15%]), whole genome duplication (5 of 20 tumors [25%]), and 3p deletion (11 of 20 tumors [55%]). There were high rates of TERT promoter mutation in recurrent and metastatic HPV-negative HNSCC (13 of 30 tumors [43%]), cutaneous SCC (11 of 21 tumors [52%]), basal cell carcinoma (3 of 4 tumors [75%]), and ACC (5 of 36 tumors [14%]). Activating NOTCH1 mutations were enriched in metastatic ACCs (8 of 36 tumors [22%]).

Conclusions and Relevance

These findings reveal the molecular landscape of advanced disease and rare cancer subtypes, both predominant challenges in head and neck oncology. To understand the repertoire of targetable alterations in advanced cancers, it is necessary to sequence recurrent and metastatic tumors. These data are important first steps toward implementation of precision head and neck oncology.

Patient Reflections on Decision Making for Laryngeal Cancer Treatment

Objective To describe the reflections of patients treated for laryngeal cancer with regard to treatment-related decision making. Study Design Cross-sectional survey-based pilot study. Setting Single-institution tertiary care cancer center. Subjects/Methods Adults with laryngeal carcinoma were eligible to participate (N = 57; 46% treated surgically, 54% nonsurgically). Validated surveys measuring decisional conflict and regret explored patients' reflections on their preferences and priorities regarding treatment-related decision making for laryngeal cancer and how patient-reported functional outcomes, professional referral patterns, and desired provider input influenced these reflections. Results When considering the level of involvement of surgeons, radiation oncologists, and medical oncologists in their care, patients were more likely to believe that the specialist whom they saw first was the most important factor in deciding how to treat their cancer (Fisher's exact, ~χ² = 16.2, df = 6, P = .02). Patients who were treated for laryngeal cancer who reported worse voice-related quality of life recalled more decisional conflict ( P = .01) and experienced more decisional regret ( P < .001). Of the patients for whom speech was a top priority prior to treatment, better voice-related quality of life overall scores were correlated with less decision regret about treatment decisions ( P < .02). Of the patients for whom eating and drinking were top priorities prior to treatment, better MD Anderson Dysphagia Inventory global scores were correlated with less decision regret about treatment decisions ( P < .002). Conclusion Patient priorities and attitudes, coupled with functional outcomes and professional referral patterns, influence how patients reflect on their choices regarding management of laryngeal cancer. Better understanding of these variables may assist in ensuring that patients' voices are integrated into individualized laryngeal cancer treatment planning.

The toxicity and efficacy of concomitant chemoradiotherapy in patients aged 70 years and older with oropharyngeal carcinoma in the intensity-modulated radiotherapy era

BACKGROUND

Despite controversy surrounding its benefit, the use of concomitant chemoradiotherapy (CCRT) in patients with oropharyngeal squamous cell carcinoma (OPSCC) who are aged > 70 years is increasing. However, to the authors' knowledge, few studies to date have compared the outcomes of different systemic treatments in this population.

METHODS

Records from 74 patients aged ≥ 70 years with stage III to stage IVB OPSCC who were undergoing CCRT from 2002 to 2013 at a single institution were reviewed. Patients were stratified according to the systemic therapy received, including cisplatin, carboplatin with either 5-fluorouracil or paclitaxel (CARB), or cetuximab to compare oncologic outcome and toxicity.

RESULTS

The median follow-up was 36 months. The median age of the patients was 75.3 years (range, 70-91 years), with significantly older patients receiving cetuximab (P = .03). A total of 28, 20, and 26 patients, respectively, received CCRT with cisplatin, CARB, and cetuximab. RT interruptions of > 1 day were needed in 4% of patients receiving cisplatin, 20% of patients receiving CARB, and 15% of patients receiving cetuximab (P = .19). Unplanned hospitalizations during CCRT occurred in 25%, 55%, and 58%, respectively, of patients receiving cisplatin, CARB, and cetuximab (P = .03). There were 2 treatment-related deaths, both of which occurred among the patients who were treated with cetuximab. At 5 years, locoregional control was achieved in 100%, 88%, and 60% (P<.001), respectively, and the overall survival rate was 87%, 61%, and 47% (P = .03), respectively, among patients treated with cisplatin, CARB, and cetuximab.

CONCLUSIONS

Toxicity from CCRT remains a challenge for older adults with OPSCC. Herein, the authors found no evidence that this toxicity was mitigated by treatment with cetuximab. Nevertheless, a subset of patients aged ≥70 years appear to tolerate cisplatin-based treatment with acceptable toxicity and excellent outcomes. Further identification of this patient subgroup is crucial to optimize therapy for older patients with OPSCC. Cancer 2017;123:1345-1353. © 2016 American Cancer Society.

A phase II study of axitinib (AG-013736) in patients with incurable adenoid cystic carcinoma

BACKGROUND

Recurrent/metastatic adenoid cystic carcinoma (ACC) is an incurable disease with no standard treatments. The majority of ACCs express the oncogenic transcription factor MYB (also c-myb), often in the context of a MYB gene rearrangement. This phase II trial of the tyrosine kinase inhibitor (TKI) axitinib (Pfizer) tested the hypothesis that targeting pathways activated by MYB can be therapeutically effective for ACC.

PATIENTS AND METHODS

This is a minimax two-stage, phase II trial that enrolled patients with incurable ACC of any primary site. Progressive or symptomatic disease was required. Patients were treated with axitinib 5 mg oral twice daily; dose escalation was allowed. The primary end point was best overall response (BOR). An exploratory analysis correlating biomarkers to drug benefit was conducted, including next-generation sequencing (NGS) in 11 patients.

RESULTS

Thirty-three patients were registered and evaluable for response. Fifteen patients had the axitinib dose increased. Tumor shrinkage was achieved in 22 (66.7%); 3 (9.1%) had confirmed partial responses. Twenty-five (75.8%) patients had stable disease, 10 of whom had disease stability for >6 months. The median progression-free survival (PFS) was 5.7 months (range 0.92-21.8 months). Grade 3 axitinib-related toxicities included hypertension, oral pain and fatigue. A trend toward superior PFS was noted with the MYB/NFIB rearrangement, although this was not statistically significant. NGS revealed three tumors with 4q12 amplification, producing increased copies of axitinib-targeted genes PDGFR/KDR/KIT. Two 4q12 amplified patients achieved stable disease for >6 months, including one with significant tumor reduction and the longest PFS on study (21.8 months).

CONCLUSIONS

Although the primary end point was not met, axitinib exhibited clinical activity with tumor shrinkage achieved in the majority of patients with progressive disease before trial enrollment. Analysis of MYB biomarkers and genomic profiling suggests the hypothesis that 4q12 amplified ACCs are a disease subset that benefit from TKI therapy.

A review of weight loss and sarcopenia in patients with head and neck cancer treated with chemoradiation

Background

Concurrent chemotherapy and radiation (CTRT) improves disease-free survival in locally advanced head and neck cancer but is associated with numerous acute and chronic toxicities resulting in substantial alterations in body mass and composition. We aim to summarize the current evidence on body composition changes experienced by patients undergoing CTRT, examine the impact of these changes on clinical outcomes and address potential interventions aimed at mitigating the loss.

Main Body

Loss of 20 % of pre-CTRT weight predicts poorer treatment tolerance and 30-day mortality. While clinical practice focuses on body weight, emerging data indicates that CTRT causes profound adverse changes in lean body mass (sarcopenia). Higher prevalence of sarcopenia predicts poorer disease-free survival as well as overall survival, lower quality of life and functional performance. The magnitude of CTRT-induced sarcopenia is the equivalent to that observed in a decade of aging in a healthy adult. Alterations in body composition are only explained, in part, by decreased caloric intake; other significant predictors include body mass index, stage, and dysphagia. Lifestyle interventions aimed at preventing loss of whole-body and especially lean mass include nutritional counseling, nutritional supplements, dietary supplements and exercise training. Personalized nutritional counseling has been associated with improvement in quality of life, while the benefits of feeding tube placement are inconsistent. There are inconsistently reported benefits of resistance training in this population.

Conclusion

Patients with head and neck cancer undergoing CTRT therapy experience dramatic shifts in body composition, including sarcopenia, which can negatively impact clinical outcomes. Efforts to understand the magnitude, clinical importance and mechanisms of sarcopenia are needed to inform a more personalized approach to mitigating the body composition changes associated with CTRT.

Employment and return to work following chemoradiation in patient with HPV-related oropharyngeal cancer

Background

Human papillomavirus (HPV)-positive oropharyngeal cancer primarily affects working-age adults. Chemotherapy and radiation (CTRT) used to treat this disease may adversely impact a survivors' ability to work after treatment.

Methods

We surveyed participants with HPV-positive oropharyngeal cancer who completed CTRT regarding employment. We examined the associations between 1) sociodemographic and clinical factors and employment outcomes, and 2) health-related quality of life and satisfaction with ability to work.

Results

102 participants were employed full-time at diagnosis for pay and surveyed at a median of 23 months post-CTRT (range 12-57 months). The median age at diagnosis was 57 years (range 25-76 years). During CTRT, 8 % stopped working permanently, 89 % took time off or reduced responsibility but later returned, and 3 % reported no change. For those who took time off but returned, median time to return to work was 14.5 weeks. In multivariable analysis, younger age predicted for needing more than the median time off. At time of survey, 85 % participants were working, 7 % had retired, and 8 % were not working for other reasons. Seventeen percent of participants were not satisfied with their current ability to work, which was associated with poorer health-related quality of life and persistent treatment toxicities (p < 0.001).

Conclusions

CTRT interrupts employment in the majority of working patients with HPV-positive oropharyngeal cancer but most return. However, treatment-related toxicities might lead to dissatisfaction with ability to work.