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Split-field versus extended-field step-and-shoot IMRT techniques in nasopharyngeal cancer: a report of acute and late toxicities

Published online by Cambridge University Press:  25 January 2021

Wimrak Onchan Open the ORCID record for Wimrak Onchan [Opens in a new window] ,
Wannapha Nobnop Open the ORCID record for Wannapha Nobnop [Opens in a new window] ,
Patrinee Traisathit Open the ORCID record for Patrinee Traisathit [Opens in a new window] ,
Somvilai Chakrabandhu Open the ORCID record for Somvilai Chakrabandhu [Opens in a new window] ,
Ekkasit Tharavichitkul Open the ORCID record for Ekkasit Tharavichitkul [Opens in a new window] ,
Pitchayaponne Klunklin Open the ORCID record for Pitchayaponne Klunklin [Opens in a new window] ,
Bongkot Jia-Mahasap Open the ORCID record for Bongkot Jia-Mahasap [Opens in a new window]  and
Imjai Chitapanarux Open the ORCID record for Imjai Chitapanarux [Opens in a new window]
Wimrak Onchan
Affiliation:
Division of Radiation Oncology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand Northern Thai Research Group of Radiation Oncology (NTRG-RO), Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
Wannapha Nobnop
Affiliation:
Division of Radiation Oncology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand Northern Thai Research Group of Radiation Oncology (NTRG-RO), Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
Patrinee Traisathit
Affiliation:
Department of Statistics, Faculty of Science, Chiang Mai University, Chiang Mai, Thailand Research Center in Bioresources for Agriculture, Industry and Medicine, Department of Statistics, Faculty of Science, Chiang Mai University, Chiang Mai, Thailand
Somvilai Chakrabandhu
Affiliation:
Division of Radiation Oncology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand Northern Thai Research Group of Radiation Oncology (NTRG-RO), Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
Ekkasit Tharavichitkul
Affiliation:
Division of Radiation Oncology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand Northern Thai Research Group of Radiation Oncology (NTRG-RO), Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
Pitchayaponne Klunklin
Affiliation:
Division of Radiation Oncology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand Northern Thai Research Group of Radiation Oncology (NTRG-RO), Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
Bongkot Jia-Mahasap
Affiliation:
Division of Radiation Oncology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand Northern Thai Research Group of Radiation Oncology (NTRG-RO), Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
Imjai Chitapanarux*
Affiliation:
Division of Radiation Oncology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand Northern Thai Research Group of Radiation Oncology (NTRG-RO), Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
*
Author for correspondence: Imjai Chitapanarux, Professor at Division of Radiation Oncology, and Chair of Northern Thai Research Group of Radiation Oncology (NTRG-RO), Faculty of Medicine, Chiang Mai University, 111 Intawarorose Road, Chiang Mai, 50200, Thailand. Tel: 6653935456. Fax: 6653935491. E-mails: [email protected], [email protected]
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Abstract

Aim:

This study aimed to evaluate acute and late toxicities in nasopharyngeal cancer (NPC) patients who were treated between split-field (SF) and extended-field (EF) step-and-shoot intensity-modulated radiotherapy (IMRT) techniques.

Materials and methods:

Between January 2011 and October 2011, 21 NPC patients with stage I-IVB (7th edition American Joint Committee on Cancer Staging) were randomly assigned to undergo radiotherapy with SF or EF step-and-shoot IMRT technique.

Results:

At a median follow-up time of 60 months (range 3–77), we reported the comparable acute and late toxicities between the two techniques. One patient (9%) in SF-IMRT arm developed grade 3 acute skin toxicity.

Findings:

Both SF and EF step-and-shoot IMRT techniques for NPC patients did not produce any statistically significant differences in both acute and late toxicities. Although no difference in toxicity was observed, technical problems due to field matching management were the obstacles in utilisation of SF-IMRT in our routine practice.

Keywords

split-fieldextended-fieldIntensity Modulated RadiotherapyIMRTnasopharyngeal cancer
Type
Original Article
Information
Journal of Radiotherapy in Practice , Volume 21 , Issue 1 , March 2022 , pp. 74 - 80
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Copyright
© The Author(s), 2021. Published by Cambridge University Press

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