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Updated: Jun 4, 2026
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Electromagnetic Navigation Transthoracic Nodule Localization for Minimally Invasive Thoracic Surgery
Published on: May 4, 2022
Screening-detected lung cancers: is systematic nodal dissection always essential?
Giulia Veronesi1, Patrick Maisonneuve, Giuseppe Pelosi
1Division of Thoracic Surgery, European Institute of Oncology, Milan, Italy.
Summary
For early lung cancer, small nodules (≤10 mm) and low PET-CT uptake (maxSUV <2.0) indicate a low risk of lymph node metastasis, potentially avoiding extensive surgery.
Area of Science:
- Thoracic Oncology
- Surgical Oncology
- Diagnostic Imaging
Background:
- Determining the necessity of systematic lymph node dissection in early lung cancer is crucial.
- Identifying predictors of nodal involvement can refine treatment strategies.
Purpose of the Study:
- To identify factors predicting lymph node involvement in early lung cancer.
- To assess if systematic lymph node dissection can be avoided in select cases.
Main Methods:
- Retrospective analysis of 97 patients from a CT screening study with clinical T1-2N0M0 lung cancer.
- Evaluation of nodule size and PET-CT maxSUV to predict nodal involvement in 193 nonscreening-detected clinical stage I lung cancers.
Main Results:
- Nodal metastasis (pN+) was observed in 6.2% of screening patients and 22% of nonscreening patients with larger nodules (>10 mm) and higher maxSUV (≥2.0).
- Patients with nodules ≤10 mm or maxSUV <2.0 had a very low rate of pN+ (0% and 8% respectively in nonscreening group).
- Nodule size and PET-CT maxSUV were significant predictors of nodal involvement.
Conclusions:
- Early-stage clinically N0 lung cancers with maxSUV <2.0 or nodule size ≤10 mm have a low risk of nodal involvement.
- Systematic nodal dissection may be safely omitted in these specific early lung cancer cases.
- Nodule size and PET-CT maxSUV are valuable tools for risk stratification in early lung cancer.