Changes in Merkel cell oncoprotein antibodies after radiation therapy in curatively treated Merkel cell carcinoma and association with recurrence.

BACKGROUND: Serum antibodies to the Merkel oncoprotein (AMERK) are detectable in approximately 50% of patients with Merkel cell carcinoma (MCC) and can be used to monitor for recurrence. The objective of this study was to characterize AMERK levels in patients receiving curative-intent radiation therapy (RT) for MCC and identify associations between AMERK and recurrence. METHODS: This was a retrospective study of patients with MCC who had baseline AMERK measurements before they received curative-intent RT from 2010 to 2020. Event-free survival (EFS) was calculated using the Kaplan-Meier method and Cox regression. The cumulative incidence of MCC-related recurrence (CIMR) was analyzed with death as a competing risk and the Gray test. RESULTS: The authors identified 88 patients who had baseline AMERK measurements, including 52 (59%) with detectable levels. AMERK positivity was associated with younger median age (67.8 vs. 72.0 years; p = .02) and tumor site (p = 0.02), with lower rates for those who had disease in the head/neck region (17.3% vs. 44.4%). EFS (71.3% vs. 60.4%; p = .30) and CIMR (24.4% vs. 39.6%; p = .23) were more favorable in AMERK-positive patients. Two patients had recurrences in the RT field, and both were AMERK-negative at baseline. The median time to AMERK nadir after RT was 11.2 months; and, in a 6-month post-RT landmark analysis, the proportion of patients who were AMERK-positive who became negative or who had levels that decreased by ≥50% were not associated with EFS (87.1% vs. 85.0%; p = .90) or CIMR (12.9% vs. 15.0%; p = .62). CONCLUSIONS: Positive AMERK baseline levels were correlated with younger age at MCC diagnosis and nonhead and neck tumor location, possibly related to the distribution of viral etiology. A specific post-RT AMERK decline correlating with EFS could not be identified.

Exposed bone in patients with head and neck cancer treated with radiation therapy: An analysis of the Observational Study of Dental Outcomes in Head and Neck Cancer Patients (OraRad).

BACKGROUND: Patients with head and neck cancer (HNC) treated with radiation therapy (RT) are at risk for jaw osteoradionecrosis (ORN), which is largely characterized by the presence of exposed necrotic bone. This report describes the incidence and clinical course of and risk factors for exposed intraoral bone in the multicenter Observational Study of Dental Outcomes in Head and Neck Cancer Patients (OraRad) cohort. METHODS: Participants were evaluated before RT and at 6, 12, 18, and 24 months after RT. Exposed bone was characterized by location, sequestrum formation, and other associated features. The radiation dose to the affected area was determined, and the history of treatment for exposed bone was recorded. RESULTS: The study enrolled 572 participants; 35 (6.1%) were diagnosed with incident exposed bone at 6 (47% of reports), 12 (24%), 18 (20%), and 24 months (8%), with 60% being sequestrum and with 7 cases (20%) persisting for >6 months. The average maximum RT dose to the affected area of exposed bone was 5456 cGy (SD, 1768 cGy); the most frequent associated primary RT sites were the oropharynx (42.9%) and oral cavity (31.4%), and 76% of episodes occurred in the mandible. The diagnosis of ORN was confirmed in 18 participants for an incidence rate of 3.1% (18 of 572). Risk factors included pre-RT extractions (P = .008), a higher RT dose (P = .039), and tobacco use (P = .048). CONCLUSIONS: The 2-year incidence of exposed bone in the OraRad cohort was 6.1%; the incidence of confirmed ORN was 3.1%. Exposed bone after RT for HNC is relatively uncommon and, in most cases, is a short-term complication, not a recurring or persistent one.

Adjuvant radiation following clear margin resection of high T-stage cutaneous squamous cell carcinoma halves the risk of local and locoregional recurrence: A dual-center retrospective study.

BACKGROUND: Although adjuvant radiation (ART) following clear margin surgery is recommended for select high-risk cutaneous squamous cell carcinomas, efficacy data are limited. OBJECTIVE: To evaluate the impact of ART on outcomes following clear margin surgery for high T-stage cutaneous squamous cell carcinomas. METHODS: A 20-year retrospective cohort study at 2 academic centers of high T-stage cutaneous squamous cell carcinomas (Brigham and Women's Hospital T2b or T3) with negative histologic margins post resection. Local recurrence (LR) and locoregional recurrence (LRR) were compared by whether tumors received ART or observation. RESULTS: A total of 508 tumors were included, of which 96 underwent ART (ART+). ART+ had a lower 5-year cumulative incidence of LR (ART+, 3.6% [95% CI, 1.6%-7.7%] vs ART-, 8.7% [95% CI, 6.3%-12.0%]) and LRR (ART+, 7.5% [95% CI, 4.4%-11.9%] vs ART-, 15.3% [95% CI, 11.9%-22.1%]). Recurrent tumors ≥6 cm or Brigham and Women's Hospital T3 tumors were classified as high-risk due to a higher 5-year cumulative incidence of LRR (High-risk, 26.3% [95% CI, 19.0%-35.7%]). High-risk tumors treated with ART had a lower 5-year cumulative incidence of LRR (ART+, 17.2% [95% CI, 11.9%-26.4%] vs ART-, 31.0% [95% CI, 26.1%-40.8%]). LIMITATIONS: Retrospective design, heterogeneous population, variations in radiation protocols. CONCLUSION: ART following clear margin surgery for high T-stage cutaneous squamous cell carcinomas resulted in half the risk of LR and LRR.

Short-term mortality risks among patients with oropharynx cancer by human papillomavirus status.

BACKGROUND: There is substantial variation in head and neck cancer (HNC) mortality and competing mortality among patients with HNC. In this study, the authors characterize the causes and risks of short-term mortality among patients with oropharynx cancer (OPC) and how these risks differ by human papillomavirus (HPV) status. METHODS: A custom Surveillance, Epidemiology, and End Results (SEER) data set with HPV status was used to identify 4930 patients with OPC who were diagnosed with nonmetastatic (M0) disease from 2013 to 2014, including 3560 (72.2%) HPV-positive patients and 1370 HPV-negative patients. Causes of death and cumulative incidence estimates for HNC-specific mortality, competing mortality, second-cancer mortality, and noncancer mortality were analyzed by HPV status. Risk factors for mortality events were determined using multivariable competing risk regression models. RESULTS: Compared with HPV-negative patients, HPV-positive patients had a lower risk of 2-year cumulative incidence of all-cause mortality (10.4% vs 33.3%; P < .0001) and a lower risk of both HNC-specific mortality (4.8% vs 16.2%; P < .0001) and competing-cause mortality (5.6% vs 16.8%; P < .0001). Second-cancer mortality was the most common cause of non-HNC mortality among HPV-negative patients. Both second-cancer mortality and noncancer mortality were significantly higher among patients who had HPV-negative OPC (10.8% and 6.1%, respectively) compared with those who had HPV-positive OPC (2.4% and 3.2%, respectively; both P < .0001). The median follow-up was 11 months (range 1-23 months) in this cohort with known HPV-status. CONCLUSIONS: Patients with HPV-positive and HPV-negative OPC have significantly different rates of both HNC mortality and competing mortality. HPV-negative patients are at substantial risk of competing mortality, even within 2 years of cancer diagnosis. These differences can inform power calculations for clinical trials and patient management in the acute and survivorship settings.

The Benefits of Adjuvant Trastuzumab for HER-2-Positive Salivary Gland Cancers.

BACKGROUND: Although high-grade salivary gland cancers (SGCs) often express androgen receptor (AR) and/or HER-2/neu, therapeutically targeting these receptors in SGC remains investigational. We investigated the prevalence of receptor expression and the benefit of adjuvant HER-2 directed therapy in the high-risk postoperative setting and explored the clinical utility of sequentially targeting these receptors in the setting of advanced disease. MATERIALS AND METHODS: We clinically annotated 95 patients with SGC (excluding adenoid cystic carcinoma) treated at our institution from 2002 to 2019 and recorded AR, HER-2/neu status, and tumor genomic profiling results when available. Clinicopathologic information was then integrated with outcomes. RESULTS: Of 95 patients, most had high-risk histologies, with salivary duct carcinoma (SDC) as the most frequent diagnosis (43, 45%). Thirty-five (37%) experienced recurrence (51% SDC). HER-2/neu was positive (1-3+) by immunostaining in 34 of 52 (65%) evaluable cases. There was no difference in survival based on HER-2/neu or AR expression. Nine of 17 (53%) patients with HER-2+ SDC received adjuvant chemoradiation with trastuzumab. Median disease-free survival (DFS) and overall survival (OS) were longer among patients with HER-2/neu 3+ staining tumors who received adjuvant trastuzumab versus those who did not (DFS, 117 vs. 9 months; p = .02; OS, 74 vs. 43 months; p = .02), with no difference among other HER-2/neu subgroups (0-2+). Two of nine (22%) patients treated with adjuvant trastuzumab demonstrated recurrence, both with low HER-2/neu staining intensity (1+). Longer time to recurrence (hazard ratio, 0.94; p = .01) predicted improved outcomes. Both androgen deprivation and HER-2-directed therapies had clinical benefit beyond the first-line metastatic setting, with partial response observed beyond second-line use. CONCLUSION: Although prospective data are lacking, the use of adjuvant trastuzumab in high-risk patients with SGC appears beneficial, particularly among patients with tumors exhibiting HER-2/neu 3+ immunostaining. IMPLICATIONS FOR PRACTICE: Results of this study showed an improved disease-free and overall survival in patients treated with adjuvant trastuzumab for high-risk salivary gland cancers with strong HER-2/neu staining intensity. Following recurrence or metastatic spread, sequential HER-2, and androgen-directed therapies may benefit certain patients with salivary gland cancer.

The Use of Hyperbaric Oxygen for the Prevention and Management of Osteoradionecrosis of the Jaw: A Dana-Farber/Brigham and Women's Cancer Center Multidisciplinary Guideline.

BACKGROUND: Osteoradionecrosis of the jaw (ORN) is an infrequent yet potentially devastating complication of radiation therapy to the head and neck region. Treatment options include antimicrobial therapy, local sequestrectomy, resection, and the use of hyperbaric oxygen (HBO). Published data on ORN are difficult to compare because of the lack of a universally accepted classification and staging system, and the literature on the use of HBO to either prevent or successfully manage ORN is controversial and inconclusive. Therefore, we aimed to establish a standard approach for using HBO at our institution. MATERIALS AND METHODS: A literature search was conducted of articles published in the English language between January 1980 and January 2016. Retrieved articles were evaluated by two independent reviewers. Isolated case reports, abstracts, case series, review articles, and cohort studies without a control group were excluded; summary data were extracted from the remaining studies. A panel of experts from Head and Neck Oncology and Oral Medicine from the Dana-Farber Cancer Institute and Brigham and Women's Hospital reviewed the summary data and established multidisciplinary guidelines on the use of HBO for the prevention and management of ORN. RESULTS: Seven studies were evaluated and reviewed by the multidisciplinary panel. There was no consistent evidence in support of HBO for either the prevention or management of ORN. CONCLUSION: Based on the available evidence and expert opinion, routine use of HBO for the prevention or management of ORN is not recommended and is rarely used at our institution. The Oncologist 2017;22:343-350 IMPLICATIONS FOR PRACTICE: The Division of Head and Neck Oncology of Dana-Farber/Brigham and Women's Cancer Center does not recommend the routine use of HBO for the prevention or management of ORN. Adjunctive HBO may be considered for use on a case-by-case basis in patients considered to be at exceptionally high risk who have failed conservative therapy and subsequent surgical resection.

Intensive treatment and survival outcomes in NUT midline carcinoma of the head and neck.

BACKGROUND: NUT midline carcinoma is a rare and aggressive genetically characterized subtype of squamous cell carcinoma frequently arising from the head and neck. The characteristics and optimal management of head and neck NUT midline carcinoma (HNNMC) are unclear. METHODS: A retrospective review of all known cases of HNNMC in the International NUT Midline Carcinoma Registry as of December 31, 2014, was performed. Forty-eight consecutive patients were treated from 1993 to 2014, and clinicopathologic variables and outcomes for 40 patients were available for analyses; they composed the largest HNNMC cohort studied to date. Overall survival (OS) and progression-free survival (PFS) according to patient characteristics and treatment were analyzed. RESULTS: This study identified a 5-fold increase in the diagnosis of HNNMC from 2011 to 2014. The median age was 21.9 years (range, 0.1-81.7 years); the male and female proportions were 40% and 60%, respectively; and 86% had bromodomain containing 4-nuclear protein in testis (BRD4-NUT) fusion. The initial treatment was initial surgery with or without adjuvant chemoradiation or adjuvant radiation (56%), initial radiation with or without chemotherapy (15%), or initial chemotherapy with or without surgery or radiation (28%). The median PFS was 6.6 months (range, 4.7-8.4 months). The median OS was 9.7 months (range, 6.6-15.6 months). The 2-year PFS rate was 26% (95% confidence interval [CI], 13%-40%). The 2-year OS rate was 30% (95% CI, 16%-46%). Initial surgery with or without postoperative chemoradiation or radiation (P = .04) and complete resection with negative margins (P = .01) were significant predictors of improved OS even after adjustments for age, tumor size, and neck lymphadenopathy. Initial radiation or chemotherapy and the NUT translocation type were not associated with outcomes. CONCLUSIONS: HNNMC portends a poor prognosis. Aggressive initial surgical resection with or without postoperative chemoradiation or radiation is associated with significantly enhanced survival. Chemotherapy or radiation alone is often inadequate. Cancer 2016;122:3632-40. © 2016 American Cancer Society.

Definitive chemoradiation alters the immunologic landscape and immune checkpoints in head and neck cancer.

BACKGROUND: Preclinical and clinical studies suggest potential synergy between high dose per fraction focal radiation and immunotherapy. However, conventionally fractionated radiation regimens in combination with concurrent chemotherapy are more commonly administered to patients as definitive treatment and may have both immune-stimulating and -suppressive effects. METHODS: We prospectively collected longitudinal samples from head and neck squamous cell carcinoma patients receiving definitive radiation therapy. We quantified changes in populations of circulating immune cells and chemokines CXCL9, 10, and 16. Analyses of humoral and cellular immune responses were conducted in select patients via proteomic analysis and T-cell receptor sequencing. RESULTS: Treatment not only increased circulating CD-8+ T-effector cells, but also myeloid-derived suppressor cells, regulatory T cells, and checkpoint receptor-expressing T cells, particularly PD-1+ T cells. Significant decreases in CXCL10 and increases in CXLC16 were noted. Treatment also increased the percentage of unique and dominant TCR clones, and increased humoral responses as measured by proteomic array. CONCLUSIONS: Our results suggest that fractionated chemoradiation leads to quantifiable effects in circulating immune mediators, including a balance of stimulatory and suppressive mechanisms. These results suggest future combinations with immune checkpoint blockade.

Acupuncture for Chemoradiation Therapy-Related Dysphagia in Head and Neck Cancer: A Pilot Randomized Sham-Controlled Trial.

INTRODUCTION: Dysphagia is common in head and neck cancer patients after concurrent chemoradiation therapy (CRT). This study evaluated the feasibility of conducting a randomized sham-controlled trial and collected preliminary data on safety and efficacy of acupuncture. PATIENTS AND METHODS: Head and neck cancer (HNC) patients with stage III-IV squamous cell carcinoma were randomized to 12 sessions of either active acupuncture (AA) or sham acupuncture (SA) during and following CRT. Patients were blinded to treatment assignment. Swallowing-related quality of life (QOL) was assessed using the MD Anderson Dysphagia Inventory (MDADI) total and subscale scores. RESULTS: Multiple aspects of trial feasibility were confirmed. Forty-two of 196 patients screened (21%) were enrolled and randomized to receive AA (n = 21) or SA (n = 21); 79% completed at least 10 of 12 planned acupuncture sessions; 81% completed the study follow-ups. The majority of patients reported uncertainty regarding their treatment assignment, with no difference between the AA and SA groups. Audits confirmed both AA and SA treatments were delivered with high fidelity. No serious acupuncture-related side effects were observed. MDADI total scores significantly improved from baseline to 12 months post-CRT in both groups (AA: +7.9; SA +13.9; p = .044, p < .001). Similar patterns were observed for the MDADI global subscale (AA: +25.0; SA +22.7; p = .001, p = .002). Intent-to-treat analyses suggested no difference between the treatment groups (p = .17, p = .76 for MDADI total and global scores, respectively). CONCLUSION: A sham-controlled randomized trial evaluating acupuncture in dysphagia-related QOL in HNC found the procedure to be feasible and safe. Further investigation is required to evaluate efficacy. IMPLICATIONS FOR PRACTICE: Dysphagia or swallowing difficulty is an important and common condition after concurrent chemoradiation therapy in head and neck cancer patients. In addition to current available supportive care, acupuncture may offer potential for treating dysphagia. This study demonstrated that both active acupuncture and sham acupuncture are safe and were associated with improved dysphagia-related quality of life from baseline to 12 months after concurrent chemoradiation therapy. This study was not designed to inform underlying specific versus nonspecific effects. Future larger-scale pragmatic clinical trials evaluating the effectiveness of acupuncture versus standard of care are warranted, and further mechanistic research is needed to understand how active versus purportedly sham acupuncture procedures affect dysphagia-related symptoms.

Merkel Cell Carcinoma: A Population Analysis on Survival.

PURPOSE: Merkel cell carcinoma (MCC) is an aggressive cutaneous malignancy. However, factors associated with disease presentation and outcomes remain uncertain, especially in light of recent changes in workup, such as sentinel lymph node biopsy. Therefore, this study used the SEER database to examine factors that could affect stage at presentation and treatment. METHODS: We identified 4,543 patients and evaluated associations between sex, race, age, primary disease site, disease presentation, and treatment. We also used univariate and multivariate analyses to examine the effect of these factors on disease-specific survival (DSS) and overall survival (OS). We specifically conducted subgroup analyses on a more modern cohort of patients with MCC treated between 2006 and 2012. RESULTS: Male sex, older age, larger tumor size, and primary tumors of the scalp, neck, or trunk were associated with a higher burden of nodal disease. Multivariate predictors of worse DSS/OS in both the recent and overall cohort included age older than 75 years, number of lymph nodes involved, tumors greater than 5 cm, metastatic disease, or lack of radiation therapy. The number of involved nodes was the best predictor of DSS/OS. Associations with radiation therapy were most pronounced in patients with nodal disease and those not undergoing surgery. CONCLUSIONS: Sex, age, tumor size, and primary site of disease correlated with burden of nodal disease in MCC. Associations between disease presentation and treatment strategies such as radiation and DSS and OS have remained relatively constant in the modern era from 2006 to 2012 compared with findings from prior studies.

Changing prognostic significance of tumor stage and nodal stage in patients with squamous cell carcinoma of the oropharynx in the human papillomavirus era.

BACKGROUND: Although human papillomavirus (HPV)-associated oropharyngeal squamous cell carcinoma (OPSCC) tends to present at an advanced nodal stage (N stage), the prognosis is generally better than that for HPV-negative OPSCC. Prior work has demonstrated the increasing incidence of HPV-related OPSCC in the United States. This study was designed to determine whether the changing epidemiology of OPSCC is reflected in changes in the prognostic significance of the tumor stage (T stage) and the N stage in a population-based cohort. METHODS: The Surveillance, Epidemiology, and End Results program was used to identify 13,328 patients who were 18 years old or older and were diagnosed with OPSCC from 1997 to 2008. The Kaplan-Meier method was used to estimate head and neck cancer-specific survival. Cox proportional hazards models were used to evaluate the associations between head and neck cancer-specific mortality (HNCSM) and T and N stages and the interaction of variables with the year of diagnosis. RESULTS: With a median follow-up of 67 months, there were 4099 head and neck cancer deaths. There was a significant interaction between the T stage and time (P for interaction = .01), with the effect of the T stage on HNCSM increasing from 1997 to 2008. The T stage retained a linear relationship with HNCSM. The effect of the N stage on HNCSM declined over time (P for interaction = .0004). The current American Joint Committee on Cancer (AJCC) staging system did not subdivide distinct prognostic subgroups for HNCSM by overall stage. CONCLUSIONS: In this population-based study of OPSCC, the effect of the N stage on cancer-specific mortality decreased over time as the impact of the T stage increased. The current AJCC staging system did not distinguish prognostic subgroups. These changes may reflect the increasing prevalence of HPV-related OPSCC. Further study in HPV-defined cohorts is needed to tailor the AJCC staging system to better reflect HNCSM risk. Cancer 2015;121:2594-2602. © 2015 American Cancer Society.

Induction chemotherapy followed by concurrent chemoradiotherapy (sequential chemoradiotherapy) versus concurrent chemoradiotherapy alone in locally advanced head and neck cancer (PARADIGM): a randomised phase 3 trial.

BACKGROUND: The relative efficacy of the addition of induction chemotherapy to chemoradiotherapy compared with chemoradiotherapy alone for patients with head and neck cancer is unclear. The PARADIGM study is a multicentre open-label phase 3 study comparing the use of docetaxel, cisplatin, and fluorouracil (TPF) induction chemotherapy followed by concurrent chemoradiotherapy with cisplatin-based concurrent chemoradiotherapy alone in patients with locally advanced head and neck cancer. METHODS: Adult patients with previously untreated, non-metastatic, newly diagnosed head and neck cancer were eligible. Patients were eligible if their tumour was either unresectable or of low surgical curability on the basis of advanced tumour stage (3 or 4) or regional-node stage (2 or 3, except T1N2), or if they were a candidate for organ preservation. Patients were randomly assigned (in a 1:1 ratio) to receive either induction chemotherapy with three cycles of TPF followed by concurrent chemoradiotherapy with either docetaxel or carboplatin or concurrent chemoradiotherapy alone with two cycles of bolus cisplatin. A computer-generated randomisation schedule using minimisation was prepared and the treatment assignment was done centrally at one of the study sites. Patients, study staff, and investigators were not masked to group assignment. Stratification factors were WHO performance status, primary disease site, and stage. The primary endpoint was overall survival. Analysis was by intention to treat. Patient accrual was terminated in December, 2008, because of slow enrolment. The trial is registered with ClinicalTrials.gov, number NCT00095875. FINDINGS: Between Aug 24, 2004, and Dec 29, 2008, we enrolled 145 patients across 16 sites. After a median follow-up of 49 months (IQR 39-63), 41 patients had died-20 in the induction chemotherapy followed by chemoradiotherapy group and 21 in the chemoradiotherapy alone group. 3-year overall survival was 73% (95% CI 60-82) in the induction therapy followed by chemoradiotherapy group and 78% (66-86) in the chemoradiotherapy alone group (hazard ratio 1·09, 95% CI 0·59-2·03; p=0·77). More patients had febrile neutropenia in the induction chemotherapy followed by chemoradiotherapy group (16 patients) than in the chemoradiotherapy alone group (one patient). INTERPRETATION: Although survival results were good in both groups there was no difference noted between those patients treated with induction chemotherapy followed by chemoradiotherapy and those who received chemoradiotherapy alone. We cannot rule out the possibility of a difference in survival going undetected due to early termination of the trial. Clinicians should still use their best judgment, based on the available data, in the decision of how to best treat patients. The addition of induction chemotherapy remains an appropriate approach for advanced disease with high risk for local or distant failure. FUNDING: Sanofi-Aventis.

An analysis of medical malpractice claims against medical oncologists from a national database: Implications for safer practice.

Malpractice claims data include valuable information about patient safety. We used mixed methods to analyze claims against medical oncologists (MO) from 2008 to 2019 using a national database. MO claims were compared to a group of other internal medicine subspecialties (OIMS). Logistic regression was used to examine correlates of closing with an indemnity payment. A subset of claims against MO were thematically analyzed using a validated safety incident taxonomy as a framework. 456 claims against MO were compared with 5771 claims against OIMS. MO claims closed with indemnity payments 29.8% of the time versus OIMS 30.3% (p = 0.87). Median MO and OIMS indemnity payments were similar ($190,591 vs. $233,432; p = 0.20). Correlates of MO claims closing with payment included patient assessment, communication among providers, and safety and security as contributing factors. Thematic analysis identified provider cognitive error, adverse drug events and relational problems as the most common safety incidents. MO malpractice claims have similar outcomes to OIMS. We demonstrate the proof-of-concept of applying a safety incident taxonomy to medical malpractice. Finding ways to reduce patient exposure to provider cognitive errors, adverse drug reactions, and communication breakdowns should be strategic priorities for safer cancer care.

Management of Continuous Glucose Monitors in Radiation Oncology Patients.

Continuous glucose monitors (CGMs) are an increasingly prevalent electronic medical device used by patients with diabetes, offering several advantages over "finger sticks." There is a resulting rise in patients with CGMs seen in radiation oncology clinics. Manufacturers specify that CGMs should not be exposed to radiation (both diagnostic and therapeutic) due to the risk of device damage, creating challenges for patients and providers. We present a workflow for the management of CGMs in radiation oncology patients, beginning with systematic screening by providers and staff. We propose options for CGM management together with the device prescriber, including removal of the CGM or keeping it in place with periodic finger sticks to confirm the accuracy and offer guidance to radiation oncology providers and staff.

Personalized ctDNA for Monitoring Disease Status in Head and Neck Squamous Cell Carcinoma.

PURPOSE: Many patients with locoregionally advanced human papillomavirus-negative head and neck squamous cell carcinoma (HNSCC) relapse. ctDNA has the potential to identify minimal residual disease, but its clinical utility for virus-negative HNSCC is not well understood. EXPERIMENTAL DESIGN: We retrospectively evaluated a personalized, commercial ctDNA assay (Signatera, Natera) during clinical care of patients treated for predominantly newly diagnosed human papillomavirus-negative HNSCC. Signatera utilizes 16-plex PCR from matched tumor and blood. Objectives were to understand ctDNA detectability and correlate changes posttreatment with disease outcomes. RESULTS: Testing was successful in 100/116 (86%) patients (median age: 65 years, 68% male, 65% smokers); testing failed in 16 (14%) because of insufficient tissue. Oral cavity (55, 47%) tumors were most common; most had stage III to IV disease (82, 71%), whereas 17 (15%) had distant metastases. Pretreatment, 75/100 patients with successful testing (75%) had detectable ctDNA (range: 0.03-4049.69 mean tumor molecules/mL). No clinical features predicted ctDNA detectability or levels (multivariate analysis). At a median follow-up of 5.1 months (range: 0.2-15.1), 55 (55%) had >1 test result (range: 1-7; 194 samples). Of 55 patients, 17 (31%) remained ctDNA positive after starting treatment. Progression-free survival was significantly worse for patients who were ctDNA positive versus ctDNA negative posttreatment (HR, 7.33; 95% confidence interval, 3.12-17.2; P < 0.001); 1-year overall survival was 89.1% versus 100%, respectively (HR, 7.46; 95% confidence interval, 0.46-119.5; P = 0.155). CONCLUSIONS: Tumor-informed ctDNA testing is feasible in nonviral HNSCC. ctDNA positivity is an indicator of disease progression and associated with inferior survival. Further research is warranted to understand whether ctDNA may be leveraged to guide therapy in HNSCC.

Organ preservation for adenoid cystic carcinoma of the larynx.

OBJECTIVES: Two cases of adenoid cystic carcinoma (ACC) of the larynx were treated with chemoradiotherapy (CRT) for organ preservation. We reviewed case series and current literature to contrast the potential role of primary CRT as an organ-sparing modality with standard laryngectomy and radiotherapy in patients with laryngeal ACC. METHODS: Two treatment-naïve patients with laryngeal ACC treated at Dana-Farber Cancer Institute between 2002 and 2007 were identified. Both patients were offered standard laryngectomy followed by adjuvant radiotherapy or organ-sparing treatment modality. RESULTS: Both patients were males, aged 57 and 73. The patients completed a course of combined chemoradiotherapy with weekly carboplatin and paclitaxel and 7-8 weeks of radiotherapy to a total dose of 6,600 and 7,000 cGy over 50 and 57 days, respectively. There were no treatment breaks or delays because of toxicity. The major toxicities reported by both patients, as anticipated, were Grade 3 mucositis, desquamative dermatitis, and severe dysphagia, all of which resolved. Both patients are alive with local regional control and functional larynx; one at 112+ months with pulmonary metastases at 54 months, and the other disease free at 60+ months. CONCLUSIONS: Definitive chemoradiation with weekly carboplatin and paclitaxel may be a potential alternative to the current standard of surgery and radiation for patients with locally advanced laryngeal ACC who request an organ-sparing approach. In this group of patients, salvage laryngectomy may be reserved for those who are locally recurrent or chemoradiotherapy resistant. Although CRT provided long-term local regional control in our two patients, there are evident limitations in obtaining evidence for a determination of treatment of rare diseases. This report provides support for following an organ preservation plan in selected patients.

Trastuzumab for the treatment of salivary duct carcinoma.

OBJECTIVE: Salivary duct carcinoma (SDC) is a rare and aggressive malignancy with high mortality and poor response to treatment. A significant fraction of SDCs are HER2 positive. This retrospective review examines HER2 testing in SDC and the outcome of trastuzumab-based therapy in adjuvant and palliative settings. METHODS: A total of 13 patients with SDC and HER2/neu expression by immunohistochemistry of 1-3+ were treated with trastuzumab in adjuvant (n = 8) or palliative (n = 5) setting. Adjuvant therapy consisted of concurrent radiation and chemotherapy with weekly paclitaxel, carboplatin, and trastuzumab (TCH) for 6 weeks followed by TCH for 12 weeks and trastuzumab alone for 1 year. Palliative treatment for metastatic disease consisted of TCH every 3 weeks for 6 cycles followed by trastuzumab for variable time periods with or without second-line chemotherapy for progression. All patients had fluorescence in situ hybridization testing for HER2/neu gene amplification. RESULTS: The median duration of follow-up was 27 months (range: 8-48 months). In all, 62% of adjuvant patients (5/8) had no evidence of disease more than 2 years from completion of therapy. All patients with metastatic disease (5/5 patients) responded to treatment with TCH. One patient achieved a complete response and remains with no evidence of disease 52 months after initiation of TCH. The median duration of response was 18 months (range: 8-52 months). CONCLUSION: HER2/neu positivity and treatment with trastuzumab correlated well with long-term survival and response in our patients. Based on this data, we propose that HER2/neu status be examined routinely in all patients with SDCs and the treatment be directed accordingly.

Development and Validation of an Automated Image-Based Deep Learning Platform for Sarcopenia Assessment in Head and Neck Cancer.

Importance: Sarcopenia is an established prognostic factor in patients with head and neck squamous cell carcinoma (HNSCC); the quantification of sarcopenia assessed by imaging is typically achieved through the skeletal muscle index (SMI), which can be derived from cervical skeletal muscle segmentation and cross-sectional area. However, manual muscle segmentation is labor intensive, prone to interobserver variability, and impractical for large-scale clinical use. Objective: To develop and externally validate a fully automated image-based deep learning platform for cervical vertebral muscle segmentation and SMI calculation and evaluate associations with survival and treatment toxicity outcomes. Design, Setting, and Participants: For this prognostic study, a model development data set was curated from publicly available and deidentified data from patients with HNSCC treated at MD Anderson Cancer Center between January 1, 2003, and December 31, 2013. A total of 899 patients undergoing primary radiation for HNSCC with abdominal computed tomography scans and complete clinical information were selected. An external validation data set was retrospectively collected from patients undergoing primary radiation therapy between January 1, 1996, and December 31, 2013, at Brigham and Women's Hospital. The data analysis was performed between May 1, 2022, and March 31, 2023. Exposure: C3 vertebral skeletal muscle segmentation during radiation therapy for HNSCC. Main Outcomes and Measures: Overall survival and treatment toxicity outcomes of HNSCC. Results: The total patient cohort comprised 899 patients with HNSCC (median [range] age, 58 [24-90] years; 140 female [15.6%] and 755 male [84.0%]). Dice similarity coefficients for the validation set (n = 96) and internal test set (n = 48) were 0.90 (95% CI, 0.90-0.91) and 0.90 (95% CI, 0.89-0.91), respectively, with a mean 96.2% acceptable rate between 2 reviewers on external clinical testing (n = 377). Estimated cross-sectional area and SMI values were associated with manually annotated values (Pearson r = 0.99; P < .001) across data sets. On multivariable Cox proportional hazards regression, SMI-derived sarcopenia was associated with worse overall survival (hazard ratio, 2.05; 95% CI, 1.04-4.04; P = .04) and longer feeding tube duration (median [range], 162 [6-1477] vs 134 [15-1255] days; hazard ratio, 0.66; 95% CI, 0.48-0.89; P = .006) than no sarcopenia. Conclusions and Relevance: This prognostic study's findings show external validation of a fully automated deep learning pipeline to accurately measure sarcopenia in HNSCC and an association with important disease outcomes. The pipeline could enable the integration of sarcopenia assessment into clinical decision making for individuals with HNSCC.