deltatrials
Recruiting NA INTERVENTIONAL 2-arm NCT04109079

Axillary Management in Breast Cancer Patients With Needle Biopsy Proven Nodal Metastases After Neoadjuvant Chemotherapy (ATNEC)

ATNEC - Axillary Management in T1-3N1M0 Breast Cancer Patients With Needle Biopsy Proven Nodal Metastases at Presentation After Neoadjuvant Chemotherapy

Sponsor: University Hospitals of Derby and Burton NHS Foundation Trust

Conditions Breast Cancer Neoplasm, Breast Sentinel Lymph Node
Interventions Axillary lymph node dissection Axillary radiotherapy Breast or chest wall radiotherapy
Updated 21 times since 2019 Last updated: Dec 18, 2025 Started: Feb 26, 2021 Primary completion: Feb 28, 2030 Completion: Feb 28, 2030
This information is for research purposes only and is not medical advice. Consult a healthcare provider before making any medical decision.

This NA trial investigates Breast Cancer and Neoplasm, Breast and is currently actively recruiting participants. University Hospitals of Derby and Burton NHS Foundation Trust leads this study, which shows 21 recorded versions since 2021 — indicating substantial longitudinal coverage. As an oncology study, it adds to the longitudinal record of treatment development for this indication.

Status Flow

~Oct 2019 – ~Nov 2019 · 31 days · monthly snapshot~Nov 2019 – ~Feb 2020 · 3 months · monthly snapshot~Feb 2020 – ~Nov 2020 · 9 months · monthly snapshot~Nov 2020 – ~Jan 2021 · 2 months · monthly snapshot~Jan 2021 – ~Feb 2021 · 31 days · monthly snapshot~Feb 2021 – ~Sep 2021 · 7 months · monthly snapshot~Sep 2021 – ~Oct 2021 · 30 days · monthly snapshot~Oct 2021 – ~Nov 2021 · 31 days · monthly snapshot~Nov 2021 – ~Jan 2022 · 2 months · monthly snapshot~Jan 2022 – ~Mar 2022 · 59 days · monthly snapshot~Mar 2022 – ~Jul 2022 · 4 months · monthly snapshot~Jul 2022 – ~Sep 2022 · 2 months · monthly snapshot~Sep 2022 – ~Mar 2023 · 6 months · monthly snapshot~Mar 2023 – ~Aug 2023 · 5 months · monthly snapshot~Aug 2023 – ~Feb 2024 · 6 months · monthly snapshot~Feb 2024 – ~Jul 2024 · 5 months · monthly snapshot~Jul 2024 – ~Sep 2024 · 2 months · monthly snapshot~Sep 2024 – ~Nov 2024 · 2 months · monthly snapshot~Nov 2024 – ~Sep 2025 · 10 months · monthly snapshot~Sep 2025 – ~Jan 2026 · 4 months · monthly snapshot~Jan 2026 – present · 6 months · monthly snapshot

Change History

21 versions recorded

  1. Jan 2026 — Present [monthly]

    Recruiting NA

  2. Sep 2025 — Jan 2026 [monthly]

    Recruiting NA

  3. Nov 2024 — Sep 2025 [monthly]

    Recruiting NA

  4. Sep 2024 — Nov 2024 [monthly]

    Recruiting NA

  5. Jul 2024 — Sep 2024 [monthly]

    Recruiting NA

▶ Show 16 earlier versions

  1. Feb 2024 — Jul 2024 [monthly]

    Recruiting NA

  2. Aug 2023 — Feb 2024 [monthly]

    Recruiting NA

  3. Mar 2023 — Aug 2023 [monthly]

    Recruiting NA

  4. Sep 2022 — Mar 2023 [monthly]

    Recruiting NA

  5. Jul 2022 — Sep 2022 [monthly]

    Recruiting NA

  6. Mar 2022 — Jul 2022 [monthly]

    Recruiting NA

  7. Jan 2022 — Mar 2022 [monthly]

    Recruiting NA

  8. Nov 2021 — Jan 2022 [monthly]

    Recruiting NA

  9. Oct 2021 — Nov 2021 [monthly]

    Recruiting NA

  10. Sep 2021 — Oct 2021 [monthly]

    Recruiting NA

  11. Feb 2021 — Sep 2021 [monthly]

    Recruiting NA

  12. Jan 2021 — Feb 2021 [monthly]

    Recruiting NA

  13. Nov 2020 — Jan 2021 [monthly]

    Recruiting NA

    Status: Not Yet Recruiting → Recruiting

  14. Feb 2020 — Nov 2020 [monthly]

    Not Yet Recruiting NA

  15. Nov 2019 — Feb 2020 [monthly]

    Not Yet Recruiting NA

  16. Oct 2019 — Nov 2019 [monthly]

    Not Yet Recruiting NA

    First recorded

Eligibility Summary

No eligibility information available.

Contact Information

Sponsor contact:
  • University Hospitals of Derby and Burton NHS Foundation Trust
Data source: University Hospitals of Derby and Burton NHS Foundation Trust

For direct contact, visit the study record on ClinicalTrials.gov .

Study Locations

Aberdeen, United Kingdom , Ashford, United Kingdom , Ashton-under-Lyne, United Kingdom , Ayr, United Kingdom , Basildon, United Kingdom , Belfast, United Kingdom , Birmingham, United Kingdom , Blackpool, United Kingdom , Bolton, United Kingdom , Bradford, United Kingdom and 77 more locations