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Refusal of Sentinel Lymph Node Biopsy in Patients With Luminal A Subtype Early Breast Cancer (LumiNOde)

6 de maio de 2026 atualizado por: N.N. Petrov National Medical Research Center of Oncology

Sentinel lymph node biopsy (SLNB) is the standard of axillary lymph node surgical staging in patients with early breast cancer.

The main goal of the study is to abandon axillary surgery in patients over 59 years old with early, luminal A, clinical lymph node negative breast cancer.

Visão geral do estudo

Status

Recrutamento

Condições

Intervenção / Tratamento

Descrição detalhada

Sentinel lymph node biopsy (SLNB) has replaced axillary lymph node dissection (ALND) in early breast cancer and has been widely implemented in clinical practice worldwide. The primary goal of SLNB is to reduce the complications associated with ALND while maintaining high anti-tumor efficacy.

However, many studies have shown that although SLNB reduces the complications typical of ALND, the incidence of these complications remains high: the risk of developing lymphedema is 7.5%, sensory disturbances and restrictions in arm movement occur in 5-8% of cases. It is well known that these complications negatively affect the physical, psychological, and emotional well-being of women, thereby reducing their quality of life.

It is also noteworthy that there is a relatively high rate of false-negative results in SLNB (ranging from 4.6% to 16.7%).

Due to advances in imaging diagnostic methods, the accuracy of preoperative assessment of lymph node status has significantly improved. According to studies, the sensitivity and specificity of ultrasound examination of the axillary lymph nodes in diagnosing lymph node involvement are 85% and 78%, respectively. Other sources, however, report a 15.5% of false-negative rate in preoperative ultrasound examinations. Consequently, the diagnostic field of standard radiological methods (ultrasound, CT, MRI) in assessing axillary lymph node status is deemed 'insufficient'. Mammolymphoscintigraphy is an additional diagnostic method based on the detection of pathophysiological alterations in the energy metabolism of tumor cells at the subcellular and molecular levels. Moreover, since metabolic changes usually precede anatomical reorganization, functional imaging methods are regarded as having greater sensitivity in identifying neoplastic changes. Our own experience with radiolabeled 99mTc lipophilic cations in diagnosing axillary lymph node metastasis breast cancer demonstrated that the sensitivity, specificity, and overall accuracy of the method were 80%, 84%, and 76%, respectively. Therefore, in this study, we are incorporating mammolymphoscintigraphy as an essential method for determining lymph node status.

In recent years, the status of axillary lymph nodes has played a diminishing role for adjuvant therapy in early breast cancer patients. Furthermore, in the luminal A subtype of early breast cancer, hormone therapy will be prescribed in the adjuvant setting regardless of axillary lymph node status.

Thus, the existing clinical data do not allow for a definitive conclusion regarding the role of SLNB in early breast cancer patients with the luminal A subtype. To address this and other questions, the present study was initiated

Tipo de estudo

Intervencional

Inscrição (Estimado)

100

Estágio

  • Não aplicável

Contactos e Locais

Esta seção fornece os detalhes de contato para aqueles que conduzem o estudo e informações sobre onde este estudo está sendo realizado.

Contato de estudo

Estude backup de contato

Locais de estudo

  • Rússia
    • Russian Federation
      • Saint Petersburg, Russian Federation, Rússia, 197758
        • Recrutamento
        • N.N. Petrov National Medical Research Center of Oncology

Critérios de participação

Os pesquisadores procuram pessoas que se encaixem em uma determinada descrição, chamada de critérios de elegibilidade. Alguns exemplos desses critérios são a condição geral de saúde de uma pessoa ou tratamentos anteriores.

Critérios de elegibilidade

Idades elegíveis para estudo

  • Adulto
  • Adulto mais velho

Aceita Voluntários Saudáveis

Não

Descrição

Inclusion Criteria:

  1. HER2-negative breast cancer (ER +/ PR +), Ki67 <= 30%, G1-2
  2. age> 59 years.
  3. morphologically confirmed diagnosis of breast cancer, IA-IIA stage
  4. ECOG score 0-2.
  5. the absence of contraindications to surgical intervention (including anesthetic risk is taken into account).
  6. patient is able to provide informed consent and sign approved consent forms to participate in the study.
  7. patients after surgical treatment in the scope of breast resection with sentinel lymph node biopsy (SLNB, group 1) or without axillary surgery (without SLNB, group 2).
  8. N0 status of axillary lymph nodes according to ultrasound and SPECT-CT of the breast with 99mTc-Technetril.

Exclusion Criteria:

  1. Inconsistency with inclusion criteria.
  2. stage T2-4, N1 or M1 cancer
  3. severe uncontrolled concomitant chronic diseases or acute diseases
  4. previous/concurrent malignancy or history of radiation therapy to the chest wall region
  5. any condition that is a contraindication to radiation therapy

5. pregnancy

Plano de estudo

Esta seção fornece detalhes do plano de estudo, incluindo como o estudo é projetado e o que o estudo está medindo.

Como o estudo é projetado?

Detalhes do projeto

  • Finalidade Principal: Tratamento
  • Alocação: Randomizado
  • Modelo Intervencional: Atribuição Paralela
  • Mascaramento: Nenhum (rótulo aberto)

Armas e Intervenções

Grupo de Participantes / Braço
Intervenção / Tratamento
Experimental: Group 2:breast resection without sentinel lymph node biopsy, radiotherapy to the breast area and SLN
  1. Prior to the surgical phase of treatment, all patients undergo SPECT-CT of the breasts with 99mTc-Technetril and SPECT-CT of the sentinel lymph nodes with Tc99m-colloid. A sectoral resection of the breast is performed according to the standard technique, with subsequent histological examination of the excised tissue. Surgical staging using sentinel lymph node biopsy is not performed.
  2. In the next phase, 4-12 weeks after surgery, 3D conformal radiotherapy is administered to the remaining breast tissue, including the region of the sentinel lymph nodes as identified by the preoperative SPECT-CT of the sentinel lymph nodes with Tc99m-colloid. Radiation planning is carried out according to ESTRO protocols, modified in accordance with the atlas of the sentinel lymph nodes.
  3. Based on the postoperative histological findings, adjuvant systemic therapy is prescribed to the patient in accordance with current clinical guidelines.
Procedimento: breast resection
breast resection without sentinel lymph node biopsy, radiotherapy to the breast area and sentinel lymph nodes
Comparador Ativo: Group 1: Breast resection with biopsy of the sentinel lymph node, radiotherapy
  1. Prior to surgical treatment all patients undergo breast SPECT-CT using 99mTc-Technetril and SPECT-CT of the SLN using Tc99m-colloid. The patient then undergoes a sectoral resection of the breast with a sentinel lymph node biopsy, followed by histological analysis of the excised tissue.
  2. In the next stage, 3D conformal RT is administered to the remaining breast tissue 4 to 12 weeks after the surgical treatment. In patients who have undergone SLNB, only the remaining breast tissue is irradiated, without irradiation of the axillary region, provided that the postoperative histological examination shows no evidence of sentinel lymph node involvement. If metastatic involvement of the SLN is detected, additional RT of the axillary region is performed. Radiation planning is carried out in accordance with ESTRO protocols.
  3. Based on the postoperative histological findings, the patient is prescribed adjuvant systemic therapy in accordance with current clinical guidelines.
Procedimento: Breast resection with sentinel lymph node biopsy
Breast resection with sentinel lymph node biopsy, radiotherapy to the breast and axilla according to current treatment standards

O que o estudo está medindo?

Medidas de resultados primários

Medida de resultado
Descrição da medida
Prazo
Axillary recurrence rate.
Prazo: 2, 3, 5 years
Compare the rate of axillary recurrences in patients with early breast cancer who did not undergo sentinel lymph node biopsy (SLNB) versus those who received standard treatment with SLNB.
2, 3, 5 years

Medidas de resultados secundários

Medida de resultado
Descrição da medida
Prazo
locoregional recurrence-free survival
Prazo: 5 and 10 years
Compare locoregional recurrence-free survival in the study groups of patients with early breast cancer
5 and 10 years
overall survival and recurrence-free survival
Prazo: 5 and 10 years
Compare overall survival and recurrence-free survival in the study groups of patients with early breast cancer
5 and 10 years
frequency and severity of adverse events
Prazo: 3, 5 and 10 years
Compare the frequency and severity of adverse events, using the current version 5.0 of the CTCAE
3, 5 and 10 years

Colaboradores e Investigadores

É aqui que você encontrará pessoas e organizações envolvidas com este estudo.

Patrocinador

N.N. Petrov National Medical Research Center of Oncology

Datas de registro do estudo

Essas datas acompanham o progresso do registro do estudo e os envios de resumo dos resultados para ClinicalTrials.gov. Os registros do estudo e os resultados relatados são revisados ​​pela National Library of Medicine (NLM) para garantir que atendam aos padrões específicos de controle de qualidade antes de serem publicados no site público.

Datas Principais do Estudo

Início do estudo (Real)

27 de julho de 2023

Conclusão Primária (Estimado)

25 de maio de 2027

Conclusão do estudo (Estimado)

25 de maio de 2027

Datas de inscrição no estudo

Enviado pela primeira vez

6 de maio de 2026

Enviado pela primeira vez que atendeu aos critérios de CQ

6 de maio de 2026

Primeira postagem (Real)

12 de maio de 2026

Atualizações de registro de estudo

Última Atualização Postada (Real)

12 de maio de 2026

Última atualização enviada que atendeu aos critérios de controle de qualidade

6 de maio de 2026

Última verificação

1 de maio de 2026

Mais Informações

Termos relacionados a este estudo

Palavras-chave

Termos MeSH relevantes adicionais

Outros números de identificação do estudo

  • 2417313
  • 24/173 (Outro identificador: N.N. Petrov National Medical Research Center of Oncology)

Plano para dados de participantes individuais (IPD)

Planeja compartilhar dados de participantes individuais (IPD)?

SIM

Informações sobre medicamentos e dispositivos, documentos de estudo

Estuda um medicamento regulamentado pela FDA dos EUA

Não

Estuda um produto de dispositivo regulamentado pela FDA dos EUA

Não

Essas informações foram obtidas diretamente do site clinicaltrials.gov sem nenhuma alteração. Se você tiver alguma solicitação para alterar, remover ou atualizar os detalhes do seu estudo, entre em contato com register@clinicaltrials.gov. Assim que uma alteração for implementada em clinicaltrials.gov, ela também será atualizada automaticamente em nosso site .

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