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Septum-guided Segmentectomy for Deep Early-stage Lung Cancer (SGS2512) (SGS2512)

26 de abril de 2026 atualizado por: Junfeng Geng, Shanghai Chest Hospital

Effectiveness and Safety of Septum-guided Segmentectomy in Solid-dominant, Deep-seated Early-stage Non-small Cell Lung Cancer (≤2 cm): A Single-center, Prospective, Single-arm Clinical Trial

The purpose of this study is to evaluate the safety and effectiveness of a specialized surgical technique called "Septum-guided Segmentectomy" for treating early-stage lung cancer located deep within the lung tissue.Standard surgery for lung cancer often involves removing an entire lung lobe (lobectomy), which can significantly reduce a patient's breathing capacity. For small tumors, removing only a segment of the lung (segmentectomy) can preserve more healthy tissue. However, for tumors located deep in the lung, traditional segmentectomy is technically challenging and risks leaving cancer cells behind.In this study, surgeons will use the natural anatomical boundaries-the intersegmental veins and their surrounding thin membranes (septa)-as a guide to precisely remove the target lung segment. This "septum-guided" approach aims to ensure the cancer is completely removed while maximizing the preservation of healthy lung function.Participants will be followed for 3 years after surgery to monitor for cancer recurrence and assess their long-term recovery.

Visão geral do estudo

Descrição detalhada

This is a single-center, prospective, single-arm clinical trial (SGS2512) designed to validate the oncological safety and technical feasibility of septum-guided segmentectomy for deep-seated, solid-dominant early-stage non-small cell lung cancer (NSCLC).Background: While segmentectomy has been proven comparable to lobectomy for small peripheral NSCLC (≤2 cm), its application for deep-seated lesions (inner 2/3 of the lung) remains controversial. Traditional methods rely on fixed safety margins, which are often difficult to achieve in deep regions without sacrificing excessive lung tissue. This study utilizes the "intersegmental septum" as a natural barrier to define the resection boundary.Key Procedures:Surgical Technique: All procedures are performed via single-port VATS or Robot-assisted Thoracic Surgery (RATS). The core technique involves the identification and exposure of the intersegmental veins and the corresponding septa to guide the separation of the target segment.Intraoperative Second Registration: After surgery begins but before the segment is resected, a second check is performed. If frozen section pathology reveals lymph node metastasis or if the anatomical structure is unsuitable for segmentectomy, the procedure will be converted to a standard lobectomy to ensure patient safety.Follow-up: Patients will undergo regular chest CT scans, tumor marker tests, and pulmonary function tests at 1, 6, 12, 18, 24, 30, and 36 months postoperatively.Statistical Design:

The study uses an A'Hern single-stage design to evaluate the primary endpoint. With a null hypothesis (H0) of 3-year RFS ≤ 81% and an alternative hypothesis (H1) of 3-year RFS ≥ 91%, a total of 89 participants are planned for enrollment to ensure 80 evaluable cases. Data analysis will be performed using R software (version 4.0 or above).

Tipo de estudo

Intervencional

Inscrição (Estimado)

89

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

  • Nome: Qing Wang, MD, PhD
  • Número de telefone: +8618516349006
  • E-mail: pillawang@163.com

Locais de estudo

    • Shanghai Municipality
      • Shanghai, Shanghai Municipality, China, 200030
        • Recrutamento
        • Shanghai Chest Hospital
        • Contato:
        • Contato:
        • Investigador principal:
          • Junfeng Geng, MD

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:

  • Age 18-80 years
  • Clinical stage IA (cT1a-bN0M0)
  • tumor diameter ≤ 2 cm
  • Pathological feature: Solid-dominant lesion (CTR > 0.5)
  • Tumor location: Deep-seated within the lung parenchyma (inner 2/3), defined as the tumor center being located in the inner 2/3 region of the lung field on axial, coronal, and sagittal CT views
  • ECOG Performance Status: 0-1
  • Pulmonary function: FEV1 ≥ 60% predicted and DLCO SB ≥ 60% predicted
  • Participants must be willing and able to provide written informed consent

Exclusion Criteria:

  • Multiple pulmonary nodules or evidence of distant metastasis
  • Intraoperative confirmation of lymph node metastasis (N1/N2) or pleural dissemination
  • History of previous ipsilateral lung surgery
  • History of other malignant tumors within the past 5 years
  • Presence of severe cardiovascular or cerebrovascular diseases that preclude surgical tolerance
  • Pregnancy or breastfeeding

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: N / D
  • Modelo Intervencional: Atribuição de grupo único
  • Mascaramento: Nenhum (rótulo aberto)

Armas e Intervenções

Grupo de Participantes / Braço
Intervenção / Tratamento
Experimental: Septum-guided Segmentectomy
Participants with solid-dominant, deep-seated early-stage NSCLC will undergo septum-guided segmentectomy. The core technique involves identifying and utilizing the intersegmental veins and their surrounding fibrous septa as the anatomical boundaries for precise resection. Systemic lymph node sampling or dissection (at least 3 hilar and 3 mediastinal groups) is mandatory for all patients. An intraoperative second registration will be performed to ensure the oncological appropriateness of the procedure before resection.
This procedure is performed via single-port VATS or Robot-assisted Thoracic Surgery (RATS). The core technique involves the precise identification of the intersegmental veins and their surrounding fibrous sheath (septum). These natural anatomical boundaries are utilized to guide the separation and resection of the target lung segment. Unlike traditional methods that rely on fixed safety margins, this approach focuses on anatomical planes to ensure oncological safety for deep-seated lesions. Systematic lymph node sampling or dissection of at least 3 hilar and 3 mediastinal groups is mandatory. An intraoperative second registration is conducted to confirm the nodal status and anatomical suitability before finalizing the resection.

O que o estudo está medindo?

Medidas de resultados primários

Medida de resultado
Descrição da medida
Prazo
3-year Recurrence-Free Survival (RFS)
Prazo: 3 years post-operation
Percentage of participants who are alive and free of any recurrence (including local, regional, or distant recurrence) at 3 years after the surgery. Recurrence is defined from the date of surgery to the date of first evidence of recurrence by imaging (CT, PET-CT, or MRI) or biopsy.
3 years post-operation

Medidas de resultados secundários

Medida de resultado
Descrição da medida
Prazo
Operation time
Prazo: During surgery (Day 0)
The total duration of the surgical procedure, measured from the initial skin incision to the completion of skin closure.
During surgery (Day 0)
Intraoperative Blood Loss
Prazo: During surgery (Day 0)
The total volume of blood lost during the surgical procedure, estimated by measuring the volume of suctioned fluid and weighing the surgical sponges.
During surgery (Day 0)
Incidence of Postoperative Complications
Prazo: From surgery through 30 days post-operation
The percentage of participants experiencing one or more postoperative complications. Complications will be categorized and graded according to the Clavien-Dindo classification system (focusing on Grade II or higher).
From surgery through 30 days post-operation
Technical Success of Septum-guided Segmentectomy
Prazo: During surgery and up to the availability of the final pathology report (typically within 7 days post-operation)
Assessment of the surgical quality, including the R0 resection rate (no microscopic tumor cells at the margin) and the intact exposure rate of intersegmental veins.
During surgery and up to the availability of the final pathology report (typically within 7 days post-operation)
Change in Pulmonary Function (FEV1)
Prazo: Pre-operation, 6 months, and 12 months post-operation
Comparison of the Forced Expiratory Volume in 1 second (FEV1) between preoperative baseline and postoperative follow-ups to assess the preservation of lung function.
Pre-operation, 6 months, and 12 months post-operation
Local Recurrence Rate
Prazo: Up to 3 years post-operation
Incidence of recurrence occurring at the surgical margin, the remaining ipsilateral lung lobe, or the ipsilateral intrathoracic lymph nodes.
Up to 3 years post-operation

Colaboradores e Investigadores

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Publicações e links úteis

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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)

1 de abril de 2026

Conclusão Primária (Estimado)

1 de abril de 2031

Conclusão do estudo (Estimado)

1 de abril de 2031

Datas de inscrição no estudo

Enviado pela primeira vez

12 de abril de 2026

Enviado pela primeira vez que atendeu aos critérios de CQ

26 de abril de 2026

Primeira postagem (Real)

4 de maio de 2026

Atualizações de registro de estudo

Última Atualização Postada (Real)

4 de maio de 2026

Última atualização enviada que atendeu aos critérios de controle de qualidade

26 de abril de 2026

Última verificação

1 de abril de 2026

Mais Informações

Termos relacionados a este estudo

Plano para dados de participantes individuais (IPD)

Planeja compartilhar dados de participantes individuais (IPD)?

SIM

Descrição do plano IPD

Individual participant data that underlie the results reported in this article, after de-identification (text, tables, figures, and appendices), will be shared with researchers who provide a methodologically sound proposal.

Prazo de Compartilhamento de IPD

Beginning 6 months and ending 36 months following article publication.

Critérios de acesso de compartilhamento IPD

Proposals should be directed to the corresponding author (Junfeng Geng). To gain access, data requestors will need to sign a data access agreement.

Tipo de informação de suporte de compartilhamento de IPD

  • PROTOCOLO DE ESTUDO
  • SEIVA
  • CIF

Informações sobre medicamentos e dispositivos, documentos de estudo

Estuda um medicamento regulamentado pela FDA dos EUA

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Estuda um produto de dispositivo regulamentado pela FDA dos EUA

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