SCGB2A2 and neoplasm: Tumor content was more significantly associated with DCB detection in plasma compared to either tumor fraction or tissue expression alone for the detectability of FABP7 (two-sided Mann–Whitney U test P value 0.003 vs. 0.02 and 0.01, respectively) and SCGB2A2 (P value 0.0001 vs. 0.01 and 0.001, respectively) (Fig. 5).