SFTPC and neoplasm: Microscopic analyses revealed that Sftpc-CreERT2;L-Ninj1Tg/+;KrasG12D/+ mice possessed significantly higher amounts of tumor nodules (P = 0.001) (Fig. 1s), particularly those larger than 1 mm3 (volume < 1 mm3: p = 0.0406; 1 mm3 ≤ volume < 5 mm3: P = 0.0088; volume ≥ 5 mm3, P = 0.0157) (Fig. 1t), and exhibited worse overall survival (P < 0.001) (Fig. 1u) compared to these characteristics in control mice.