Fig. 4From: The value of frozen section diagnosis of tumor spread through air spaces in small-sized (≤ 2 cm) non-small cell lung cancerSuggested surgical procedure for clinical stage I small-sized NSCLC (≤ 2 cm) based on the frozen section diagnosis of STAS. NSCLC: non-small cell lung cancer; CTR: consolidation tumor ratio; STAS: tumor spread through air spacesBack to article page