MKI67 and metastatic malignant neoplasm in the lymph nodes: As for pathological features, S/MP5+ patients had higher Ki-67 index (p < 0.001), higher frequency of pleural invasion (48.1% vs. 26.6%, p < 0.001), lymphovascular invasion (13.9% vs. 0.4%, p < 0.001), STAS (29.1% vs. 1.5%, p < 0.001) and lymph node metastasis (20.3% vs. 1.5%, p < 0.001).