Head and neck intensity modulated radiation therapy leads to an increase of opportunistic oral pathogens.

Abstract:

OBJECTIVES:The introduction of intensity modulated radiation therapy (IMRT) has led to new possibilities in the treatment of head and neck cancer (HNC). Limited information is available on how this more advanced radiation technique affects the oral microflora. In a prospective study we assessed the effects of various advanced treatments for HNC on the oral microflora, as well as the effects of elimination of oral foci of infection. MATERIALS AND METHODS:All consecutive dentate patients >18years, diagnosed with a primary oral or oropharynx carcinoma and seen for a pre-treatment dental screening (May 2011-May 2013) were included. Patients were grouped by oncologic treatment: surgery (SURG), IMRT (IMRT) or IMRT+chemotherapy (CHIMRT). Dental screening data, demographic data, subgingival biofilm samples, oral lavages and whole saliva samples were obtained to microbiologically analyze the effects of cancer treatments (1-year follow-up). RESULTS:This study included 82 patients (29 SURG, 26 IMRT and 27 CHIMRT). The trends in changes in prevalence and proportions of microorganisms were comparable in the IMRT and CHIMRT group. However, relative to the SURG group, increased prevalence of enteric rods, staphylococci and Candida species was observed in the IMRT and CHIMRT groups. In these groups, elimination of oral foci decreased the frequency of detection of pathogens such as Porphyromonas gingivalis, Tannerella forsythia and Streptococcus mutans. CONCLUSION:Different treatments in HNC patients result in different changes in the oral microflora. Opportunistic pathogens such as staphylococci, enteric rods and Candida sp. tend to increase in prevalence after IMRT with or without chemotherapy, but not after surgical intervention.

journal_name

Oral Oncol

journal_title

Oral oncology

authors

Schuurhuis JM,Stokman MA,Witjes MJ,Langendijk JA,van Winkelhoff AJ,Vissink A,Spijkervet FK

doi

10.1016/j.oraloncology.2016.05.005

subject

Has Abstract

pub_date

2016-07-01 00:00:00

pages

32-40

eissn

1368-8375

issn

1879-0593

pii

S1368-8375(16)30051-3

journal_volume

58

pub_type

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