Does Early Chemotherapy Improve Survival in Advanced Endometrial Cancer?

OBJECTIVES: In endometrial cancer, the appropriate sequence of adjuvant chemotherapy (aCT) and adjuvant radiation therapy (aRT) is unclear. We aim evaluated whether early chemotherapy is associated with improved overall survival (OS) and cancer-specific survival (CSS). METHODS: Endometrial cancer patients that received aCT and aRT were selected from the SEER-Medicare database. Early chemotherapy was defined as receiving aCT before aRT, with or without additional aCT ("sandwich" regimens). All other patients received a full course of aRT before chemotherapy with or without concurrent chemotherapy. Univariate and multivariate Cox proportional hazards regression was utilized to assess the impact of clinical and demographic factors on OS. RESULTS: We selected 597 patients for analysis. Median age and was 72 years; 85% of patients were white. Overall, 68% of women had FIGO (International Federation of Gynecology and Obstetrics) stage III disease and 77% received 4 to 6 cycles of chemotherapy. Five-year OS (66.6% vs. 62.4%, P=0.46) and 5-year CSS (71.1% vs. 71.2%, P=0.88) was not significantly improved among those receiving early chemotherapy. In addition, early chemotherapy did not improve OS (hazard ratio [HR]=0.87; 95% confidence interval [CI]: 0.56-1.34, P=0.53) or CSS (HR=1.21; 95% CI: 0.82-1.79, P=0.34) on multivariate analysis. Compared with 1 to 3 cycles, receiving 4 to 6 (HR=0.48, 95% CI: 0.26-0.87, P=0.02), and ≥7 cycles (HR=0.42, 95% CI: 0.20-0.89, P=0.02) of chemotherapy was associated with improved OS. CONCLUSION: No differences in OS or CSS were noted among endometrial patients receiving early chemotherapy. However, the number of chemotherapy cycles was associated with prolonged survival.

Patterns of Care in Proton Radiation Therapy for Pediatric Central Nervous System Malignancies.

PURPOSE: Proton beam therapy (PBT) potentially allows for improved sparing of normal tissues, hopefully leading to decreased late side effects in children. Using a national registry, we sought to perform a patterns-of-care analysis for children receiving PBT for primary malignancies of the central nervous system (CNS). METHODS AND MATERIALS: Using the National Cancer Data Base, we identified pediatric patients with primary CNS malignancies that were diagnosed between 2004 and 2012. We used a standard t test for comparison of means and χ2 testing to identify differences in demographic and clinical characteristics. Univariate and multivariate logistical regression was applied to identify predictors of PBT use. RESULTS: We identified 4637 pediatric patients receiving radiation therapy from 2004 to 2012, including a subset of 267 patients treated with PBT. We found that PBT use increased with time from <1% in 2004 to 15% in 2012. In multivariate logistical regression, we found the following to be predictors of receipt of PBT: private insurance, the highest income bracket, younger age, living in a metropolitan area, and residing >200 miles from a radiation treatment facility (P<.05). CONCLUSIONS: We noted the proportion of children receiving PBT to be significantly increasing over time from <1% to 15% from 2004 to 2012. We also observed important disparities in receipt of PBT based on socioeconomic status. Children from higher-income households and with private insurance were more likely to use this expensive technology. As we continue to demonstrate the potential benefits of PBT in children, efforts are needed to expand the accessibility of PBT for children of all socioeconomic backgrounds and regions of the country.

A comprehensive analysis of brachytherapy clinical trials over the past 15 years.

PURPOSE: Clinical trials (CTs) involving brachytherapy (BT) are crucial in establishing the role of BT in the evolving landscape of cancer treatment. An analysis of BT trials is warranted to understand the factors driving their success and the future direction of the field. METHODS AND MATERIALS: We queried the clinicaltrials.gov website using the search terms: Radiation Therapy, Brachytherapy, and associated terms. This yielded 10,417 CTs between 2000 and 2015. Trials not using BT were excluded; yielding 319 CTs. Characteristics of individual CTs were obtained. Least squared linear regression, χ2 analysis, and logistic regression were used to evaluate trial characteristics. RESULTS: The majority of the CTs were phase II (37%), involving interstitial BT (45%), and treating the prostate (36%). Nongovernmental institutions (NGIs) have funded the greatest number of CTs. New CTs involving radiotherapy of all types showed increase over time (p < 0.05), whereas no corresponding increase was seen in BT trials. New BT trials independently funded by industry have declined (p = 0.01). Collaboration between industry and NGIs was associated with greater likelihood of trial completion. Industry funding was associated with Phase IV trials, usage of surface BT, among others. NIH/government funding was associated with Phase I trials, intracavitary BT, trials focused on systemic therapy, among others. CONCLUSIONS: Trials examining radiotherapy have increased, whereas trials incorporating BT have remained unchanged. Collaboration between industry and NGIs was associated with a greater likelihood for successful trial completion. The role of BT can be better realized with greater incorporation into CTs.