NDLI: Patterns of local-regional recurrence after conformal and intensity-modulated radiotherapy for head and neck cancer

Content Provider	Springer Nature : BioMed Central
Author	Johansen, Safora Norman, Mathilde H. Dale, Einar Amdal, Cecilie D. Furre, Torbjørn Malinen, Eirik Evensen, Jan F.
Abstract	Aim To evaluate the patterns of loco-regional recurrences in head and neck cancer patients Methods Twenty-six out of 112 patients treated with primary or postoperative 3D CRT or IMRT for their primary and recurrent disease between 2007 and 2013 were included. The CT images of recurrent disease were rigidly registered with the primary CT images for each patient. To assess overlaps and overlap localization, the recurrence volume overlapping with the primary target volume was identified. For relapses occurring in the regional lymph nodes, the epicenter distance in recurrences and primary volumes and dose in recurrences were also identified. The recurrences were defined as in-field, marginal or out-of-field. Results The majority of the failures occurred within 1 year after completed primary treatment. The dose differences in recurrence volume were not statistically significant when patients were treated with IMRT or 3D CRT. Recurrence in 15/26 of the included patients occurred in the regional lymph nodes located fully or partly inside the primary target volume or the elective lymph node region. The majority of recurrences were recognized as in-field, independent of the primary treatment. Conclusion Recurrence in the majority of the patients occurred in the regional lymph nodes located in high dose area. The cause of recurrence may be due to inadequate total dose in the primary treatment and/or lack of optimal primary diagnosis leading to inadequate primary target delineation.
Related Links	https://ro-journal.biomedcentral.com/counter/pdf/10.1186/s13014-017-0829-5.pdf
Ending Page	8
Page Count	8
Starting Page	1
File Format	HTM / HTML
DOI	10.1186/s13014-017-0829-5
Journal	Radiation Oncology
Issue Number	1
Volume Number	12
Language	English
Publisher	BioMed Central
Publisher Date	2017-05-25
Access Restriction	Open
Subject Keyword	Cancer Research Oncology Radiotherapy Imaging Radiology Head and neck cancer Radiotherapy technique Regional lymph node Recurrence Relapse
Content Type	Text
Resource Type	Article
Subject	Radiology, Nuclear Medicine and Imaging Oncology
Journal Impact Factor	3.3/2023
5-Year Journal Impact Factor	3.6/2023

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