Outcomes of targeted axillary radiation therapy with omission of axillary dissection in early breast cancer patients with one or two positive sentinel lymph nodes and extracapsular extension
Abstract Purpose Axillary dissection has been shown to be equivalent to axillary radiotherapy in the AMAROS trial; however, extracapsular invasion of sentinel lymph nodes was not considered among the evaluated variables. The clinical significance of extracapsular extension (ECE) in one or two positi...
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BMC
2025-06-01
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| Online Access: | https://doi.org/10.1186/s12893-025-02974-x |
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| author | Ahmed Orabi Asmaa G. Ellaithy Maha Guimei Maher H. Ibraheem Waleed Mohamed M. Fadlalla Mohamed Fathy Abdelfattah Abdelrahman Elithy Yasmine Hany Abdel Moamen Elzohery Ahmed S. Abdelmomen Sherif Nasser Taha |
| author_facet | Ahmed Orabi Asmaa G. Ellaithy Maha Guimei Maher H. Ibraheem Waleed Mohamed M. Fadlalla Mohamed Fathy Abdelfattah Abdelrahman Elithy Yasmine Hany Abdel Moamen Elzohery Ahmed S. Abdelmomen Sherif Nasser Taha |
| author_sort | Ahmed Orabi |
| collection | DOAJ |
| description | Abstract Purpose Axillary dissection has been shown to be equivalent to axillary radiotherapy in the AMAROS trial; however, extracapsular invasion of sentinel lymph nodes was not considered among the evaluated variables. The clinical significance of extracapsular extension (ECE) in one or two positive sentinel lymph nodes remains under investigation. This study aims to evaluate the impact of targeted axillary radiation therapy while omitting completion axillary lymph node dissection (ALND) in the presence of extracapsular extension. Methods A retrospective study was conducted between 2016 and 2023 involving cT1–2N0 breast cancer patients who did not receive neoadjuvant chemotherapy and underwent either breast-conserving surgery or mastectomy, with extracapsular extension present in one or two positive sentinel lymph nodes. Results Our study included 213 patients treated between 2016 and 2023, with a median follow-up of 48.07 months (range: 9.07–103.10 months). ECE was ≤ 2 mm in 201 patients (94.4%) and > 2 mm in 12 patients (5.6%). A total of 112 patients (52.6%) underwent completion ALND. Systemic recurrence occurred in 24 patients (11.3%), while local recurrence occurred in one patient (0.5%). The 5-year disease-free survival (DFS) rates were 86% in the completion axillary clearance (AC) group and 89% in the non-AC group. The estimated DFS rates for the entire study at 1, 3, and 5 years were 97%, 89%, and 86%, respectively. Conclusions Within this single-institution study of early breast cancer patients with predominantly luminal A subtype and mostly limited ECE (≤ 2 mm) treated with targeted axillary radiation, omission of ALND did not result in inferior DFS compared to completion ALND. However, these findings are preliminary, hypothesis-generating, and limited by the retrospective design, short follow-up, and specific patient population studied. Prospective studies are needed to confirm these observations. Trial registration Retrospectively registered after the approval of Baheya Ethical Committee, IRB no. 202,304,030,017. |
| format | Article |
| id | doaj-art-e2fde3338ba84dd3b56a50266a760823 |
| institution | DOAJ |
| issn | 1471-2482 |
| language | English |
| publishDate | 2025-06-01 |
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| spelling | doaj-art-e2fde3338ba84dd3b56a50266a7608232025-08-20T03:10:28ZengBMCBMC Surgery1471-24822025-06-012511910.1186/s12893-025-02974-xOutcomes of targeted axillary radiation therapy with omission of axillary dissection in early breast cancer patients with one or two positive sentinel lymph nodes and extracapsular extensionAhmed Orabi0Asmaa G. Ellaithy1Maha Guimei2Maher H. Ibraheem3Waleed Mohamed M. Fadlalla4Mohamed Fathy Abdelfattah Abdelrahman Elithy5Yasmine Hany Abdel Moamen Elzohery6Ahmed S. Abdelmomen7Sherif Nasser Taha8Surgical Oncology Department, National Cancer Institute, Cairo UniversityBaheya Centre for Early Detection and Treatment of Breast CancerAssociate Professor of Pathology, Faculty of Medicine, Alexandria UniversitySurgical Oncology Department, National Cancer Institute, Cairo UniversitySurgical Oncology Department, National Cancer Institute, Cairo UniversityLecturer of surgical oncology, Faculty of Medicine, Al Azhar UniversityAssociate Professor of General Surgery, Faculty of Medicine, Ain shams universityRadiation Therapy Department, National Cancer Institute, Cairo UniversitySurgical Oncology Department, National Cancer Institute, Cairo UniversityAbstract Purpose Axillary dissection has been shown to be equivalent to axillary radiotherapy in the AMAROS trial; however, extracapsular invasion of sentinel lymph nodes was not considered among the evaluated variables. The clinical significance of extracapsular extension (ECE) in one or two positive sentinel lymph nodes remains under investigation. This study aims to evaluate the impact of targeted axillary radiation therapy while omitting completion axillary lymph node dissection (ALND) in the presence of extracapsular extension. Methods A retrospective study was conducted between 2016 and 2023 involving cT1–2N0 breast cancer patients who did not receive neoadjuvant chemotherapy and underwent either breast-conserving surgery or mastectomy, with extracapsular extension present in one or two positive sentinel lymph nodes. Results Our study included 213 patients treated between 2016 and 2023, with a median follow-up of 48.07 months (range: 9.07–103.10 months). ECE was ≤ 2 mm in 201 patients (94.4%) and > 2 mm in 12 patients (5.6%). A total of 112 patients (52.6%) underwent completion ALND. Systemic recurrence occurred in 24 patients (11.3%), while local recurrence occurred in one patient (0.5%). The 5-year disease-free survival (DFS) rates were 86% in the completion axillary clearance (AC) group and 89% in the non-AC group. The estimated DFS rates for the entire study at 1, 3, and 5 years were 97%, 89%, and 86%, respectively. Conclusions Within this single-institution study of early breast cancer patients with predominantly luminal A subtype and mostly limited ECE (≤ 2 mm) treated with targeted axillary radiation, omission of ALND did not result in inferior DFS compared to completion ALND. However, these findings are preliminary, hypothesis-generating, and limited by the retrospective design, short follow-up, and specific patient population studied. Prospective studies are needed to confirm these observations. Trial registration Retrospectively registered after the approval of Baheya Ethical Committee, IRB no. 202,304,030,017.https://doi.org/10.1186/s12893-025-02974-xBreast cancerSentinel lymph nodeExtracapsular extensionAxillary lymph node dissection. |
| spellingShingle | Ahmed Orabi Asmaa G. Ellaithy Maha Guimei Maher H. Ibraheem Waleed Mohamed M. Fadlalla Mohamed Fathy Abdelfattah Abdelrahman Elithy Yasmine Hany Abdel Moamen Elzohery Ahmed S. Abdelmomen Sherif Nasser Taha Outcomes of targeted axillary radiation therapy with omission of axillary dissection in early breast cancer patients with one or two positive sentinel lymph nodes and extracapsular extension BMC Surgery Breast cancer Sentinel lymph node Extracapsular extension Axillary lymph node dissection. |
| title | Outcomes of targeted axillary radiation therapy with omission of axillary dissection in early breast cancer patients with one or two positive sentinel lymph nodes and extracapsular extension |
| title_full | Outcomes of targeted axillary radiation therapy with omission of axillary dissection in early breast cancer patients with one or two positive sentinel lymph nodes and extracapsular extension |
| title_fullStr | Outcomes of targeted axillary radiation therapy with omission of axillary dissection in early breast cancer patients with one or two positive sentinel lymph nodes and extracapsular extension |
| title_full_unstemmed | Outcomes of targeted axillary radiation therapy with omission of axillary dissection in early breast cancer patients with one or two positive sentinel lymph nodes and extracapsular extension |
| title_short | Outcomes of targeted axillary radiation therapy with omission of axillary dissection in early breast cancer patients with one or two positive sentinel lymph nodes and extracapsular extension |
| title_sort | outcomes of targeted axillary radiation therapy with omission of axillary dissection in early breast cancer patients with one or two positive sentinel lymph nodes and extracapsular extension |
| topic | Breast cancer Sentinel lymph node Extracapsular extension Axillary lymph node dissection. |
| url | https://doi.org/10.1186/s12893-025-02974-x |
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