263 research outputs found

    Total hemoglobin reduction in the tumor volume correlates with response to breast cancer neoadjuvant chemotherapy within two weeks of treatment

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    Optical imaging techniques have emerged as a possible alternative to predict pathological complete response (pCR) in breast cancer patients undergoing neoadjuvant chemotherapy (NAC). Our team developed a so-called diffuse optical tomographic breast imaging system (DOTBIS) which does not require the use of contrast agents or compression, and enables imaging of the whole breast volume using low intensity near infrared light capable to measure tissue concentration of oxy-hemoglobin (ctO2Hb), deoxy-hemoglobin (ctHHb) and water percentage. In this retrospective study, ctTHb changes in the tumor region of 16 breast cancer patients were analyzed across NAC. Both breasts of all patients have been scanned simultaneously with our DOTBIS system, Figure 1, which employs four wavelengths and gathers data from a total of 64 sources and 128 detectors per breast. A PDE-constrained multispectral image reconstruction code creates 3D image maps of total hemoglobin (ctHbT = ctO2Hb+ ctHHb). Tumor volume is selected by entering radiologic information such as tumor side, clock position and distance from the nipple (FN). An automated code was designed to select the highest value from the distance FN and the quadrant referent to the clock position. Subsequently, a region-based image segmentation method is implemented to examine neighboring pixels of the highest value point considering a mask of 90%. After tumor volume segmentation, we calculate the mean ctHbT extracted from the region of interest. An independent-samples t-test was run to determine if there were differences in ctTHb reduction in the tumor region before the third cycle of taxane between responders (n=4) and non-responders (n=12). ctTHb reduction was greater to pCR (45.71 ± 25.16 mM) than non-pCR tumors (-9.67 ± 25.65 mM), a statistically significant difference of 55.38 mM (95% CI, 23.74 to 87), t(14) = 3.755, p = .002, in Figure 2 we can see an example. From the ROC plot results, we can observe that ctTHb reduction in the tumor region after 2 cycles of Taxane is a good indicator to anticipate pCR status. With an area under the curve of 0.958, the best cut-off that maximizes sensitivity and specificity is 16.86mM. At this reduction level, the sensitivity is 100% and specificity is 91.7%. In conclusion, our findings indicate that DOTBIS-measured total hemoglobin in the tumor region may be a strong and independent predictor of treatment response to NAC. Please click Additional Files below to see the full abstract

    Use of a Urine Anastrozole Assay to Determine Treatment Discontinuation Among Women With Hormone-Sensitive Breast Cancer: A Pilot Study

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    Purpose: Multiple studies have shown that adherence to adjuvant hormonal therapy in women with breast cancer is suboptimal. Measurements of compliance with self-report, pill counts, and/or pharmacy records are susceptible to bias. We assessed the feasibility of using a urine anastrozole assay as an objective biomarker of nonadherence to anastrozole treatment. Patients and Methods: We recruited consecutive postmenopausal women, age ≄ 18 years, with hormone-sensitive nonmetastatic breast cancer who were prescribed anastrozole at least 3 months before enrollment. Each completed a short survey to gather information on demographics, anastrozole compliance history, and self-reported medication history, tumor characteristics, and treatment received. A single, random 15-mL urine sample was collected and tested for the presence of anastrozole using a previously validated assay. Patients were told they were part of a study to determine if anastrozole could be detected in the urine. Results: Among 96 participants, mean age was 63.7 years (range, 51 to 70 years). The population was diverse, with 56.5% white, 57.6% US born, 59.8% unemployed, and 56.6% college educated. Prior treatment included chemotherapy (50%) and/or radiotherapy (58.7%). Mean duration of anastrozole treatment was 2.2 years (standard deviation, 1.6). Four participants reported nonadherence and declined to submit urine samples, and two had no detectable level of anastrozole (six of 96; 6.3%). Detectable levels among adherent women ranged from 49.3 to 632.8 ng/mL. Conclusion: We demonstrated that collection of urine to measure anastrozole levels is feasible and reliable. Identifying biomarkers to measure adherence is critical for studies investigating interventions to improve hormonal therapy compliance

    Methods to Standardize a Multicenter Acupuncture Trial Protocol to Reduce Aromatase Inhibitor-related Joint Symptoms in Breast Cancer Patients

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    AbstractRobust methods are needed to efficiently conduct large, multisite, randomized, controlled clinical trials of acupuncture protocols. The Southwest Oncology Group (SWOG) S1200 trial is a randomized, controlled (i.e., sham-controlled and waitlist-controlled) trial of a standardized acupuncture protocol for treating aromatase inhibitor (AI)-associated arthralgias in early-stage breast cancer patients (n = 228). The primary objective of this study was to determine whether true acupuncture administered twice weekly for 6 weeks, as compared to sham acupuncture or a waitlist control, reduced AI-associated joint pain at 6 weeks as assessed by patient reports. The study was conducted at 11 institutions across the United States. The true acupuncture protocol was developed using a consensus-based process. The true acupuncture and the sham acupuncture protocols each consisted of 12 sessions administered for 6 weeks, followed by one weekly session for 6 weeks. The true acupuncture protocol used standardized protocol points, and the standardized acupoints were tailored to a patient's joint symptoms. The similarly standardized sham acupuncture protocol utilized superficial needling of nonacupoints. Standardized methods were developed to train and monitor acupuncturists and included online and in-person training, study manuals, monthly phone calls, and remote quality assurance monitoring throughout the study period. The research staff similarly received online and in-person training and monthly phone calls

    Integrating value of research into NCI Clinical Trials Cooperative Group research review and prioritization: A pilot study

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    BackgroundThe Institute of Medicine has called for approaches to help maximize the return on investments (ROI) in cancer clinical trials. Value of Research (VOR) is a health economics technique that estimates ROI and can inform research prioritization. Our objective was to evaluate the impact of using VOR analyses on the clinical trial proposal review process within the SWOG cancer clinical trials consortium.MethodsWe used a previously developed minimal modeling approach to calculate VOR estimates for 9 phase II/III SWOG proposals between February 2015 and December 2016. Estimates were presented to executive committee (EC) members (N = 12) who determine which studies are sent to the National Cancer Institute for funding consideration. EC members scored proposals from 1 (best) to 5 based on scientific merit and potential impact before and after receiving VOR estimates. EC members were surveyed to assess research priorities, proposal evaluation process satisfaction, and the VOR process.ResultsValue of Research estimates ranged from −2.1Bto2.1B to 16.46B per proposal. Following review of VOR results, the EC changed their score for eight of nine proposals. Proposal rankings were different in pre‐ vs postscores (P value: 0.03). Respondents had mixed views of the ultimate utility of VOR for their decisions with most supporting (42%) or neutral (41%) to the idea of adding VOR to the evaluation process.ConclusionsThe findings from this pilot study indicate use of VOR analyses may be a useful adjunct to inform proposal reviews within NCI Cooperative Clinical Trials groups.The Instiztute of Medicine has called for approaches to help maximize the return on investments in cancer clinical trials. The findings from this pilot study indicate use of value of research analyses may be a useful adjunct to inform proposal reviews within NCI Cooperative Clinical Trials groups.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/146484/1/cam41657.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/146484/2/cam41657_am.pd

    Association between body mass index and response to duloxetine for aromatase inhibitor‐associated musculoskeletal symptoms in SWOG S1202

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    Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/149517/1/cncr32024.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/149517/2/cncr32024_am.pd

    A survey of breast cancer physicians regarding patient involvement in breast cancer treatment decisions

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    Purpose: Shared breast cancer treatment decision-making between patients and physicians increases patient treatment satisfaction and compliance and is influenced by physician-related factors. Attitudes and behaviors about patient involvement in breast cancer treatment decisions and treatment-related communication were assessed by specialty among breast cancer physicians of women enrolled in the Breast Cancer Quality of Care Study (BQUAL). Results: Of 275 BQUAL physicians identified, 50.0% responded to the survey. Most physicians spend 46-60 min with the patient during the initial consult visit and 51.5% report that the treatment decision is made in one visit. Oncologists spend more time with new breast cancer patients during the initial consult (p = 0.021), and find it more difficult to handle their own feelings than breast surgeons (p = less than 0.001). Conclusion: Breast surgeons and oncologists share similar attitudes and behaviors related to patient involvement in treatment decision-making, yet oncologists report more difficulty managing their own feelings during the decision-making process

    Changes in vitamin and mineral supplement use after breast cancer diagnosis in the Pathways Study: a prospective cohort study

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    BACKGROUND: Vitamin and mineral supplement use after a breast cancer diagnosis is common and controversial. Dosages used and the timing of initiation and/or discontinuation of supplements have not been clearly described. METHODS: We prospectively examined changes in use of 17 vitamin/mineral supplements in the first six months following breast cancer diagnosis among 2,596 members (28% non-white) of Kaiser Permanente Northern California. We used multivariable logistic regression to examine demographic, clinical, and lifestyle predictors of initiation and discontinuation. RESULTS: Most women used vitamin/mineral supplements before (84%) and after (82%) diagnosis, with average doses far in excess of Institute of Medicine reference intakes. Over half (60.2%) reported initiating a vitamin/mineral following diagnosis, 46.3% discontinuing a vitamin/mineral, 65.6% using a vitamin/mineral continuously, and only 7.2% not using any vitamin/mineral supplement before or after diagnosis. The most commonly initiated supplements were calcium (38.2%), vitamin D (32.01%), vitamin B6 (12.3%) and magnesium (11.31%); the most commonly discontinued supplements were multivitamins (17.14%), vitamin C (15.97%) and vitamin E (45.62%). Higher education, higher intake of fruits/vegetables, and receipt of chemotherapy were associated with initiation (p-values <0.05). Younger age and breast-conserving surgery were associated with discontinuation (p-values <0.05). CONCLUSIONS: In this large cohort of ethnically diverse breast cancer patients, high numbers of women used vitamin/mineral supplements in the 6 months following breast cancer diagnosis, often at high doses and in combination with other supplements. The immediate period after diagnosis is a critical time for clinicians to counsel women on supplement use

    Prevalence and predictors of antioxidant supplement use during breast cancer treatment: The Long Island Breast Cancer Study Project

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    Although many patients take antioxidant dietary supplements during breast cancer treatment, the benefits of such supplementation are unproven. We analyzed the prevalence of and factors associated with antioxidant supplement use during breast cancer treatment among women who participated in the Long Island Breast Cancer Study Project
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