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Published in: Radiation Oncology 1/2009

Open Access 01-12-2009 | Research

Clinical-dosimetric analysis of measures of dysphagia including gastrostomy-tube dependence among head and neck cancer patients treated definitively by intensity-modulated radiotherapy with concurrent chemotherapy

Authors: Baoqing Li, Dan Li, Derick H Lau, D Gregory Farwell, Quang Luu, David M Rocke, Kathleen Newman, Jean Courquin, James A Purdy, Allen M Chen

Published in: Radiation Oncology | Issue 1/2009

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Abstract

Purpose

To investigate the association between dose to various anatomical structures and dysphagia among patients with head and neck cancer treated by definitive intensity-modulated radiotherapy (IMRT) and concurrent chemotherapy.

Methods and materials

Thirty-nine patients with squamous cancer of the head and neck were treated by definitive concurrent chemotherapy and IMRT to a median dose of 70 Gy (range, 68 to 72). In each patient, a gastrostomy tube (GT) was prophylacticly placed prior to starting treatment. Prolonged GT dependence was defined as exceeding the median GT duration of 192 days. Dysphagia was scored using standardized quality-of-life instruments. Dose-volume histogram (DVH) data incorporating the superior/middle pharyngeal constrictors (SMPC), inferior pharyngeal constrictor (IPC), cricoid pharyngeal inlet (CPI), and cervical esophagus (CE) were analyzed in relation to prolonged GT dependence, dysphagia, and weight loss.

Results

At 3 months and 6 months after treatment, 87% and 44% of patients, respectively, were GT dependent. Spearman's ρ analysis identified statistical correlations (p < 0.05) between prolonged GT dependence or high grade dysphagia with IPC V65, IPC V60, IPC Dmean, and CPI Dmax. Logistic regression model showed that IPC V65 > 30%, IPC V60 > 60%, IPC Dmean > 60 Gy, and CPI Dmax > 62 Gy predicted for greater than 50% probability of prolonged GT dependence.

Conclusion

Our analysis suggests that adhering to the following parameters may decrease the risk of prolonged GT dependence and dysphagia: IPC V65 < 15%, IPC V60 < 40%, IPC Dmean < 55 Gy, and CPI Dmax < 60 Gy.
Appendix
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Metadata
Title
Clinical-dosimetric analysis of measures of dysphagia including gastrostomy-tube dependence among head and neck cancer patients treated definitively by intensity-modulated radiotherapy with concurrent chemotherapy
Authors
Baoqing Li
Dan Li
Derick H Lau
D Gregory Farwell
Quang Luu
David M Rocke
Kathleen Newman
Jean Courquin
James A Purdy
Allen M Chen
Publication date
01-12-2009
Publisher
BioMed Central
Published in
Radiation Oncology / Issue 1/2009
Electronic ISSN: 1748-717X
DOI
https://doi.org/10.1186/1748-717X-4-52

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