Injection of radiopaque hydrogel at time of lumpectomy improves the target definition for adjuvant radiotherapy
| Autor: | Margriet A. Sattler, Gerson M. Struik, Gerda M. Verduijn, Kim C. de Vries, Erwin Birnie, Jean-Philippe Pignol, T.M.A.L. Klem, Nienke Hoekstra, Annemarie T. Swaak-Kragten, Kees Verhoef, Alja Schoonbeek, Ali Ghandi |
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| Přispěvatelé: | Radiation Oncology, Surgery |
| Rok vydání: | 2019 |
| Předmět: |
medicine.medical_specialty
Opaque hydrogel medicine.medical_treatment Breast Neoplasms Mastectomy Segmental Breast radiotherapy 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Clinical endpoint Seroma segmentation Medicine Humans Radiology Nuclear Medicine and imaging Prospective Studies CLIPS Prospective cohort study computer.programming_language Aged Adjuvant radiotherapy business.industry Radiotherapy Planning Computer-Assisted Lumpectomy Hydrogels Hematology Middle Aged medicine.disease Oncoplastic Surgery Radiation therapy Oncology 030220 oncology & carcinogenesis Seroma Female Radiotherapy Adjuvant Radiology business Tomography X-Ray Computed computer Oncoplastic surgery Radiotherapy Image-Guided |
| Zdroj: | Radiotherapy & Oncology, 131, 8-13. ELSEVIER IRELAND LTD Radiotherapy and Oncology, 131, 8-13. Elsevier Ireland Ltd |
| ISSN: | 0167-8140 |
| Popis: | Background and purpose: During oncoplastic breast-conserving surgery (BCS), the surgical cavity is closed to reduce seroma formation. This makes the radiotherapy target definition using clips challenging, leading to poor inter-observer agreement and potentially geographical misses. We hypothesize that injecting a radiopaque hydrogel in the lumpectomy cavity before closure improves radiotherapy target definition and agreement between observers.Materials and methods: Women undergoing BCS in a single university hospital were prospectively accrued in the study. Three to 9 ml of iodined PolyEthylene Glycol (PEG) hydrogel and clips were inserted in the lumpectomy cavity. A CT-scan was performed at 4 to 6 weeks. CT images of BCS patients with standard clips only were used as control group, matched on age, specimen weight, and distance between clips. Six radiation oncologists delineated the tumor bed volumes and rated the cavity visualization scores (CVS). The primary endpoint was the agreement between observers measured using a Conformity Index (Cx).Results: Forty-two patients were included, 21 hydrogel procedures and 21 controls, resulting in 315 observer pairs. The feasibility of the intervention was 100%. The median Cx was higher in the intervention group (Cx = 0.70, IQR [0.54-0.79]) than in the control group (Cx = 0.54, IQR [0.42-0.66]), p < 0.00, as were the CVS (3.5 [2.5-4.5] versus 2.5 [2-3.5], p < 0.001). The rate of surgical site infections was similar to literature.Conclusions: The use of radiopaque PEG enables to identify the lumpectomy cavity, resulting in a high inter-observer agreement for radiotherapy target definition. This intervention is easy to perform and blend well into current practice. (C) 2018 Elsevier B.V. All rights reserved. |
| Databáze: | OpenAIRE |
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