IL20RA and lung carcinoid tumor: Swarts et al. (2013) reported that IL20RA was downregulated in lung carcinoid tumors and could be used as an independent prognostic factor for such tumors. Wigle et al. (2002) also showed that the low expression of IL20RA caused by hypermethylation of DNA CpG islands was associated with poor disease-free survival of non-small cell lung cancer.