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- Ensaio Clínico NCT07564557
Septum-guided Segmentectomy for Deep Early-stage Lung Cancer (SGS2512) (SGS2512)
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
Visão geral do estudo
Status
Condições
Intervenção / Tratamento
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
Inscrição (Estimado)
Estágio
- Não aplicável
Contactos e Locais
Contato de estudo
- Nome: Junfeng Gen, MD
- Número de telefone: +8618017321501
- E-mail: drgengjunfeng@163.com
Estude backup de contato
- Nome: Qing Wang, MD, PhD
- Número de telefone: +8618516349006
- E-mail: pillawang@163.com
Locais de estudo
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Shanghai Municipality
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Shanghai, Shanghai Municipality, China, 200030
- Recrutamento
- Shanghai Chest Hospital
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Contato:
- Qing Wang
- Número de telefone: 18516349006
- E-mail: pillawang@163.com
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Contato:
- Junfeng Geng, MD
- Número de telefone: +8618017321501
- E-mail: drgengjunfeng@163.com
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Investigador principal:
- Junfeng Geng, MD
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Critérios de participação
Critérios de elegibilidade
Idades elegíveis para estudo
- Adulto
- Adulto mais velho
Aceita Voluntários Saudáveis
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
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 |
|---|---|
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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.
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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.
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O que o estudo está medindo?
Medidas de resultados primários
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
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3-year Recurrence-Free Survival (RFS)
Prazo: 3 years post-operation
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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.
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3 years post-operation
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Medidas de resultados secundários
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
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Operation time
Prazo: During surgery (Day 0)
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The total duration of the surgical procedure, measured from the initial skin incision to the completion of skin closure.
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During surgery (Day 0)
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Intraoperative Blood Loss
Prazo: During surgery (Day 0)
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The total volume of blood lost during the surgical procedure, estimated by measuring the volume of suctioned fluid and weighing the surgical sponges.
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During surgery (Day 0)
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Incidence of Postoperative Complications
Prazo: From surgery through 30 days post-operation
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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).
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From surgery through 30 days post-operation
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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)
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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.
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During surgery and up to the availability of the final pathology report (typically within 7 days post-operation)
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Change in Pulmonary Function (FEV1)
Prazo: Pre-operation, 6 months, and 12 months post-operation
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Comparison of the Forced Expiratory Volume in 1 second (FEV1) between preoperative baseline and postoperative follow-ups to assess the preservation of lung function.
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Pre-operation, 6 months, and 12 months post-operation
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Local Recurrence Rate
Prazo: Up to 3 years post-operation
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Incidence of recurrence occurring at the surgical margin, the remaining ipsilateral lung lobe, or the ipsilateral intrathoracic lymph nodes.
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Up to 3 years post-operation
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Colaboradores e Investigadores
Patrocinador
Publicações e links úteis
Publicações Gerais
- Saji H, Okada M, Tsuboi M, Nakajima R, Suzuki K, Aokage K, Aoki T, Okami J, Yoshino I, Ito H, Okumura N, Yamaguchi M, Ikeda N, Wakabayashi M, Nakamura K, Fukuda H, Nakamura S, Mitsudomi T, Watanabe SI, Asamura H; West Japan Oncology Group and Japan Clinical Oncology Group. Segmentectomy versus lobectomy in small-sized peripheral non-small-cell lung cancer (JCOG0802/WJOG4607L): a multicentre, open-label, phase 3, randomised, controlled, non-inferiority trial. Lancet. 2022 Apr 23;399(10335):1607-1617. doi: 10.1016/S0140-6736(21)02333-3.
- Tsubokawa N, Mimae T, Saeki A, Miyata Y, Kanno C, Kudo Y, Nagashima T, Ito H, Ikeda N, Okada M. Feasibility and comparative prognosis of segmentectomy versus lobectomy in centrally located small and solid dominant cN0 non-small cell lung cancer. J Thorac Cardiovasc Surg. 2025 Feb;169(2):427-435.e2. doi: 10.1016/j.jtcvs.2024.06.016. Epub 2024 Jul 3.
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- IS26028
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