BPIFA1 and nasal cavity polyp: For example, Wei and colleagues compared the expression of short palate, lung, and nasal epithelium clone 1 (SPLUNC1; also known as BPIFA1) in polyp tissue of ECRSwNP/nonECRSwNP patients with an uncinate process in controls and reported that the expression level of BPIFA1 was significantly lower in nasal polyps than in control uncinate tissues [18].