1. Concentration of volatile organic compounds (VOCs) in the exhaled breath will be analysed using mass spectrometry (Time Frame - 1 day, single measurement): The primary outcome will be the lung cancer specific mass spectrometric profile of VOCs of exhaled breath analysis (markers of lung cancer in exhaled breath).
Secondary outcome:
1. Group A: Concentration of volatile organic compounds (VOCs) in the exhaled breath will be analysed using mass spectrometry before and after lung cancer surgery (Time Frame - Group A: 2 measurements on 2 different days; Day 1: 1. measurement (before surgery), Day 2: (6-12 weeks after surgery): 2. measurement): The acquired profiles of mass spectral VOCs before and after lung cancer surgery will be analysed for significant differences.
100 patients with lung cancer Group A: 70 patients with any type of lung cancer eligible for lung cancer surgery
Group B: 30 patients with any type of lung cancer not eligible to surgery (small-cell carcinoma, squamous cell carcinoma, adenocarcinoma, large-cell carcinoma).
60 controls 60 controls (group C) matched for age, gender, smoking history.
