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The influence of pre-radiation salivary flow rates and radiation dose on parotid salivary gland dysfunction in patients receiving radiotherapy for head and neck cancers.

Identifieur interne : 000549 ( Main/Exploration ); précédent : 000548; suivant : 000550

The influence of pre-radiation salivary flow rates and radiation dose on parotid salivary gland dysfunction in patients receiving radiotherapy for head and neck cancers.

Auteurs : E. D'Hondt [États-Unis] ; A. Eisbruch ; J A Ship

Source :

RBID : pubmed:9680919

Descripteurs français

English descriptors

Abstract

Radiotherapy (RT) used for head and neck cancers causes permanent salivary gland dysfunction (SGD). Previous short-term studies have demonstrated that pre-RT salivary flow rates and the amount of radiation exposure to parotid glands influence the amount of RT-induced SGD. The purpose of this study was to determine which variables are related to the development of long-term post-RT SGD. Parotid flow rates (PFR) were assessed prior to and 1 year after completion of RT in spared parotid glands from 34 patients from 2 parotid-sparing protocols. The results reveal that spared PFR were not significantly higher 1 year post-RT in patients who had high pre-RT PFR, when compared with patients with low pre-RT PFR. However, patients who received higher doses of RT to spared parotid glands had lower PFR 1 year post-RT, compared with patients who had received lower doses of RT. These one-year findings suggest that high pre-RT PFR do not provide protection against RT-induced SGD. Conversely, reduced RT dosages to contralateral parotid glands are protective of PFR after completion of RT.

DOI: 10.1111/j.1754-4505.1998.tb00913.x
PubMed: 9680919


Affiliations:


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Le document en format XML

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<term>Head and Neck Neoplasms (radiotherapy)</term>
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<term>Radiation Dosage (MeSH)</term>
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<term>Maladies de la glande parotide (physiopathologie)</term>
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<term>Salivation (effets des radiations)</term>
<term>Soins dentaires pour malades chroniques (MeSH)</term>
<term>Sujet âgé (MeSH)</term>
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<term>Glande parotide</term>
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<term>Maladies de la glande parotide</term>
<term>Maladies de la glande salivaire</term>
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<term>Relation dose-effet des rayonnements</term>
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<div type="abstract" xml:lang="en">Radiotherapy (RT) used for head and neck cancers causes permanent salivary gland dysfunction (SGD). Previous short-term studies have demonstrated that pre-RT salivary flow rates and the amount of radiation exposure to parotid glands influence the amount of RT-induced SGD. The purpose of this study was to determine which variables are related to the development of long-term post-RT SGD. Parotid flow rates (PFR) were assessed prior to and 1 year after completion of RT in spared parotid glands from 34 patients from 2 parotid-sparing protocols. The results reveal that spared PFR were not significantly higher 1 year post-RT in patients who had high pre-RT PFR, when compared with patients with low pre-RT PFR. However, patients who received higher doses of RT to spared parotid glands had lower PFR 1 year post-RT, compared with patients who had received lower doses of RT. These one-year findings suggest that high pre-RT PFR do not provide protection against RT-induced SGD. Conversely, reduced RT dosages to contralateral parotid glands are protective of PFR after completion of RT.</div>
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