Microscopic analyses revealed that the number of tumor nodules (P = 0.0259) (Fig. 1l), particularly those larger than 1 mm3 (Fig. 1m), was significantly higher in Scgb1a1-CreERTM;L-Ninj1Tg/+ mice than it was in Scgb1a1-CreERTM;LSL-Ninj1Tg/+ mice (1 mm3 ≤ volume < 5 mm3: P < 0.001; volume ≥ 5 mm3: P = 0.0154). This evidence concerns the gene SCGB1A1 and neoplasm.