OC-0079: CTV-to-PTV margin for treatment setup errors: paediatric vs adult

Nazmy, Mohamed; O'Shea, E.; McCrickard, E.; O'Sullivan, Catriona

doi:10.1016/s0167-8140(15)40079-9

Cited by 2 publications

(6 citation statements)

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“…medulloblastoma, neuroblastoma, Wilms' tumor, Hodgkin lymphoma, rhabdomyosarcoma and (Ewing) sarcoma. In six studies, tumor types were not specified [43][44][45][46][47][48]. Seventy-one studies included only patients <18 years old, whereas 29 studies included both children and adults.…”

Section: Resultsmentioning

confidence: 99%

Pediatric radiotherapy for thoracic and abdominal targets: Organ motion, reported margin sizes, and delineation variations – A systematic review

Meijer¹,

Dijk²,

Huijskens³

et al. 2022

Radiotherapy and Oncology

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Section: Resultsmentioning

confidence: 99%

Pediatric radiotherapy for thoracic and abdominal targets: Organ motion, reported margin sizes, and delineation variations – A systematic review

Meijer¹,

Dijk²,

Huijskens³

et al. 2022

Radiotherapy and Oncology

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“…On the other hand it is not practical to consider different PTV margin for each patient based on age or height. Nazmy et al showed a clinically significant difference in the PTV margin in the abdominal region between adult and paediatric patients treated in the same institution but they defined adult patients as age >18 and paediatric patients as age <7 7 . A group exists in-between 7 and 18 years old wherein the margin should be considered individually.…”

Section: Discussionmentioning

confidence: 99%

“…Some of these factors are likely to be similar in adults and paediatrics patients such as delineation uncertainties while other factors like organ motion and setup errors may be different in adults compared with paediatric patients 6 . In spite of this, many centres apply the same PTV margin based on the treatment site in both adult or paediatric patients 7 …”

Section: Introductionmentioning

confidence: 99%

“…6 In spite of this, many centres apply the same PTV margin based on the treatment site in both adult or paediatric patients. 7 While the PTV margin calculation has been evaluated in adult patients in numerous publications, [8][9][10] the evidences of evaluation of PTV margin for paediatric patients are sparse, 3,11,12 with very few data available regarding the need for different PTV margin in paediatric patients compared with adult patients. Recently conducted analyses of the PTV margin in adult patients (>18 year old) and paediatric patients (<7 year old) treated in one centre showed a clinically significant difference (>2 mm) of the PTV margin needed in the longitudinal direction in the abdominal region.…”

Section: Introductionmentioning

confidence: 99%

“…Recently conducted analyses of the PTV margin in adult patients (>18 year old) and paediatric patients (<7 year old) treated in one centre showed a clinically significant difference (>2 mm) of the PTV margin needed in the longitudinal direction in the abdominal region. 7 The aim of this study was to evaluate the international patterns of practice regarding the PTV margin in paediatric versus adult patients and to identify the PTV margins employed per treatment site in both paediatric and adult patients treated in the same institution.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Planning target volume (PTV) margin practice patterns in adults and paediatrics among the Paediatric Radiation Oncology Society (PROS) members: an international survey

ElBeltagi¹,

Wall

Marignol³

2018

J Radiother Pract

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AimEvolving data are showing the need of considering smaller planning target volume (PTV) margin in paediatrics compared with adults treated for the same body site. This study proposed to evaluate the current patterns of practice regarding the PTV margin in paediatric patients compared with adult patients through an international survey.Materials and methodsA four-item questionnaire was created to address the PTV margins for paediatrics and adults as part of a comprehensive survey. International Paediatric Radiation Oncology Society (PROS) members were selected to partake and were contacted via email.ResultsIn total, 43 responded to the survey. The majority of the responders have written guidelines for PTV margin while the majority of those who have guidelines do not have separate guidelines for paediatrics. The implemented PTV margin for paediatric patients was in the majority 3–5 mm for the head region and 5–10 mm for the torso region and the difference from the PTV margin implemented in adults was not statistically significant.ConclusionThe majority of responders employ a series of site-specific PTV margin protocols that are applied to both adults and paediatrics, and do not take into consideration patient age or size. These results highlight the need of a separate policy for PTV margin in adults and paediatrics in every institution.

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OC-0079: CTV-to-PTV margin for treatment setup errors: paediatric vs adult

Cited by 2 publications

References 0 publications

Pediatric radiotherapy for thoracic and abdominal targets: Organ motion, reported margin sizes, and delineation variations – A systematic review

Pediatric radiotherapy for thoracic and abdominal targets: Organ motion, reported margin sizes, and delineation variations – A systematic review

Planning target volume (PTV) margin practice patterns in adults and paediatrics among the Paediatric Radiation Oncology Society (PROS) members: an international survey

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