PPDPF and lung carcinoma: Pancreatic progenitor cell differentiation and proliferation factor (PPDPF) was first reported in zebrafish.[13] PPDPF is a key regulator of exocrine pancreas development, which has potential PDZ, SH2, SH3 domain binding sites and a GTP‐binding site.[13] Recently, it was reported that circular RNA circ‐FOXM1 facilitated cell progression as ceRNA to target PPDPF and MACC1 by sponging miR‐1304‐5p in non‐small cell lung cancer,[14] indicating the involvement of PPDPF in lung cancer.