Thus, Hiltbrunner et al., with the aim to identify putative BMs in EVs that could inform on tumour left behind cystectomy, found that FR‐alpha was among a 40‐protein large subset that had a higher expression in EVs isolated from urine of the bladder of UC patients compared to ditto from ureter urine of UC patients [29]. Here, FOLR1 is linked to neoplasm.