The possible differential expression of IL-37 in cancerous (BLCA) vs. non-cancerous bladder biopsies (non-BLCA) was explored using the UALCAN portal (http://ualcan.path.uab.edu/; accessed on 1 December 2022) [35] and TNMplot web tool (www.tnmplot.com; accessed on 20 December 2022) [36]. Here, IL37 is linked to bladder transitional cell carcinoma.