Pediatric Hodgkin Lymphoma
Anni Young Lundgaard1, Mirjana Josipovic1, Laura Rechner1, Pernille Envold Bidstrup2, Rune Hansen3, Sidsel Skov Damkjaer1, Morten Joergensen1, Akmal Safwat3, Lena Specht1, Lisa Hjalgrim4, Maja V. Maraldo1
1 Department of Clinical Oncology, Copenhagen University Hospital, Denmark, 2 Danish Cancer Society Research Center, Copenhagen, Denmark, 3 Department of Clinical Oncology, Aarhus University Hospital, Denmark, 4 Department of Pediatric Haematology and Oncology, Copenhagen University Hospital, Denmark
Purpose/objectives: The use of deep inspiration breath-hold (DIBH) is recommended for radiotherapy (RT) of malignant lymphomas in the mediastinum in adults, however, no formalized studies have addressed the use of DIBH in children. TEDDI is a feasibility study introducing DIBH for pediatric patients within the NOPHO network. Prior to clinical implementation, the TEDDI pilot study was initiated to test if 1) children can perform a stable and comfortable DIBH, 2) the DIBH equipment is suitable for children, and 3) the information and coaching should be improved.
Materials/methods: The study aimed to recruit 30 children including both healthy volunteers and pediatric cancer patients not planned for radiotherapy. DIBH compliance was assessed during a 30 min coaching session at the linear accelerator with each child in a potential treatment position. The DIBH was voluntary, but monitored with an optical surface system providing a visual feedback of the respiration at the DIBH level. The child was declared DIBH compliant if he/she was able to perform 3 stable breath-holds of 20 seconds each. Patient compliance and coaching and DIBH equipment suitability were assessed from questionnaires and visual observations.
Results: A total of 32 volunteers were included at two separate institutions, 17 healthy and 15 cancer patients. The median age was 8.5 years (range: 5–15 years), and five were pre-school children. Thirteen volunteers (6 healthy, 7 patients) were found not to be suitable for RT in DIBH: four patients was not able to maintain a sufficient breath-hold, five volunteers (3 healthy, 2 patients) were not able to maintain the treatment position, and four volunteers (3 healthy, 1 patient) failed to do both. However, eight volunteers (2 healthy, 6 patients) would have been able to comply with DIBH using custom made fixation and additional coaching-time. Of the 32 volunteers, only a 5-year old, healthy boy was not able to understand the DIBH concept. The DIBH equipment was deemed suitable for children, however, the visual feedback was changed from goggles to video screens. All volunteers reported that they were either very happy (13), fairly happy (17), or content (2) with the DIBH coaching and training.
Conclusion: The TEDDI pilot study demonstrated that DIBH can be implemented for children, especially with sufficient coaching-time and proper visual feedback equipment. Consequently, the TEDDI feasibility study has been initiated.