• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 230
  • 155
  • 33
  • 33
  • 33
  • 33
  • 33
  • 33
  • 21
  • 19
  • 16
  • 13
  • 11
  • 10
  • 9
  • Tagged with
  • 564
  • 564
  • 276
  • 226
  • 225
  • 169
  • 164
  • 157
  • 149
  • 136
  • 76
  • 69
  • 60
  • 53
  • 53
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
41

Feasibility of image-guided radiotherapy based on helical tomotherapy to reduce contralateral parotid dose in head and neck cancer

Nguyen, Nam, Vos, Paul, Vinh-Hung, Vincent, Ceizyk, Misty, Smith-Raymond, Lexie, Stevie, Michelle, Slane, Benjamin, Chi, Alexander, Desai, Anand, Krafft, Shane, Jang, Siyoung, Hamilton, Russ, Karlsson, Ulf, Abraham, Dave January 2012 (has links)
BACKGROUND:To evaluate the feasibility of image-guided radiotherapy based on helical Tomotherapy to spare the contralateral parotid gland in head and neck cancer patients with unilateral or no neck node metastases.METHODS:A retrospective review of 52 patients undergoing radiotherapy for head and neck cancers with image guidance based on daily megavoltage CT imaging with helical tomotherapy was performed.RESULTS:Mean contralateral parotid dose and the volume of the contralateral parotid receiving 40Gy or more were compared between radiotherapy plans with significant constraint (SC) of less than 20Gy on parotid dose (23 patients) and the conventional constraint (CC) of 26Gy (29 patients). All patients had PTV coverage of at least 95% to the contralateral elective neck nodes. Mean contralateral parotid dose was, respectively, 14.1Gy and 24.7Gy for the SC and CC plans (p<0.0001). The volume of contralateral parotid receiving 40Gy or more was respectively 5.3% and 18.2% (p<0.0001)CONCLUSION:Tomotherapy for head and neck cancer minimized radiotherapy dose to the contralateral parotid gland in patients undergoing elective node irradiation without sacrificing target coverage.
42

Relationships between symptom interference scores, reduced dietary intake, weight loss, and reduced functional capacity

Schmidt, Karmen 06 1900 (has links)
Using an existing data set comprised of 368 individuals newly diagnosed with cancers of the head and neck, we investigated the predictive validity of the Head and Neck Patient Symptom Checklist (HNSC) by comparing scores on the HNSC to scores on the Patient-Generated Symptom Global Assessment (PG-SGA), and by examining the ability of HNSC scores and four demographic variables to predict dietary intake, weight loss, and functional capacity. HNSC sensitivity (0.79 0.98), specificity (0.99 1.00), positive predictive value (92% 100%), and negative predictive value (94% - 100%) were excellent. Pain, loss of appetite and difficulty swallowing predicted 82% of reduced dietary intake. Advanced tumor stage, loss of appetite and difficulty swallowing predicted 79% of weight loss. Loss of appetite, difficulty swallowing, feeling full and lack of energy predicted 78% of reduced functional capacity. The HNSC appears to be valid and could aid with early symptom identification, intervention and improved outcomes.
43

The Quality of Life for Patients with Head and Neck Cancer after Radiotherapy

Leung, Chung-man 01 February 2010 (has links)
The purpose of this study is to evaluate the health related quality of life (QoL) of head and neck cancer (HNC) patients with cancer-free survival after treatment and to investigate the factors correlated with their health-related QoL. The European Organization for Research and Treatment of Cancer (EORTC) Core Quality of Life Questionnaire (QLQ-C30) questionnaire and the EORTC head and neck cancer-specific questionnaire (QLQ H&N-35) were self-administered by all participating patients. Sociodemographic data were collected using a questionnaire specifically designed for the study and through the medical chart reviewed. The patients who have been treated radiotherapy in our department of radiation oncology were invited to participate Health-related quality of life was assessed 3 months or later after completion of radiotherapy. Data relating to sociodemographic factors, disease characteristics and treatment factors of HNC survivors were analyzed. A total of 141 head and neck cancer patients completed the questionnaires. After data analysis, the results are described as follows: In the results of EORTC QLQ-C30 questionnaire, the score of ¡§global health status¡¨ is 69.34. Most of the patient could maintain good functional quality of life. ¡§Fatigue¡¨ is the most impaired symptom score in the patient. In the results of EORTC QLQ-H&N35, the three head and neck specific symptom scores indicating the most impaired in QOL were ¡§Weight loss¡¨, ¡§Nutrition supplements¡¨ and ¡§dry mouth¡¨. After analysis through the multiple regression model, we found sex, age, tumor subsite, radiotherapy technique and surgery were the independent factors significantly correlated with the QoL scales This study is helpful for us to understand the QoL status and the factors affecting the QoL for patients with head and neck cancer after radiotherapy.
44

Segmented and total direct cost-of-care for advanced squamous cell carcinoma of the head and neck in a privately insured population

Reveles, Ivan Alexander 15 November 2013 (has links)
Introduction: Current treatment recommendations for advanced SCCHN include the use of combined modality therapy (e.g., radiation plus chemotherapy/biologic therapy). The new biologic agent, cetuximab, is considered a primary cost driver for SCCHN management. Cetuximab’s impact, however, has not been factored into SCCHN cost estimates; furthermore, costs have not been delineated for diagnostic, treatment, and end-of-life segments of advanced SCCHN management. We aim to characterize SCCHN segmented and overall costs, before and after cetuximab’s approval. Methods: This was a retrospective analysis of the PharMetrics Choice database. Patients >20 years of age with ICD-9-CM codes suggestive of advanced SCCHN diagnosed between 3/1/2003 and 3/1/2008 were included. Patients were divided into cohorts by diagnosis date: “pre-biologic” and “post-biologic.” Descriptive statistics were used to summarize patient characteristics, monthly and total medical costs, and cost drivers. The Mann-Whitney U test was used to compare costs between segments and cohorts; whereas, least squares regression was used to ascertain the impact of covariates. Results: A total of 365 patients met study criteria. Patients were predominately male (78%), with a median age of 57 years. Median monthly costs were: diagnosis ($2,199), treatment ($4,161), end-of-life ($6,614), and total ($4,167). Total direct medical costs were primarily driven by outpatient costs (23%). Patient age and length of follow-up had a significant impact on total costs, with older age associated with lower costs. When treatment segment was isolated, median monthly costs were lower in the “pre-biologic” as compared to the “post-biologic” era ($3,301 vs. $4,381, p=0.0024); biologic therapy accounted for 4.2% of total cost in the study period. In those patients experiencing all segments of care (“benchmark group”), median monthly costs were: diagnosis ($1,733), treatment ($8,265), end-of-life ($6,614), and total ($7,817). There were no significant differences in monthly medical costs between cohorts for the benchmark group. Conclusions: Median total cost exceeded $4,000/month for SCCHN patients; treatment and end-of-life segments incurred higher costs. Outpatient costs were the biggest cost-driver. Median monthly cost for the treatment segment increased by approximately $1,000 following cetuximab’s approval; however, this difference dissipated when the analysis was limited to those patients who experienced all segments of care. / text
45

Relationships between symptom interference scores, reduced dietary intake, weight loss, and reduced functional capacity

Schmidt, Karmen Unknown Date
No description available.
46

Body site of cutaneous malignant melanoma : primary tumor location in relation to phenotypic and prognostic factors /

Gillgren, Peter, January 2002 (has links)
Diss. (sammanfattning) Stockholm : Karol. inst., 2002. / Härtill 5 uppsatser.
47

Prognostic factors in squamous cell carcinoma of the head and neck with emphasis on 11q13 rearrangments and Cyclin D1 overexpression /

Åkervall, Jan. January 1998 (has links)
Thesis (doctoral)--Lund University, 1998. / Added t.p. with thesis statement inserted.
48

Squamous cell carcinoma of the head and neck proliferation, p53 and prognosis /

Nylander, Karin. January 1900 (has links)
Thesis (doctoral)--Umeå University, Sweden, 1995. / Added t.p. with thesis statement inserted. Includes bibliographical references.
49

Prognostic factors in squamous cell carcinoma of the head and neck with emphasis on 11q13 rearrangments and Cyclin D1 overexpression /

Åkervall, Jan. January 1998 (has links)
Thesis (doctoral)--Lund University, 1998. / Added t.p. with thesis statement inserted.
50

Squamous cell carcinoma of the head and neck proliferation, p53 and prognosis /

Nylander, Karin. January 1900 (has links)
Thesis (doctoral)--Umeå University, Sweden, 1995. / Added t.p. with thesis statement inserted. Includes bibliographical references.

Page generated in 0.0655 seconds