A neoplasm involving a urothelium. The disease is MONDO_0024337 (urothelial neoplasm). Also known as: neoplasm of urothelium, transitional cell neoplasm of the urinary tract, tumor of urothelium, tumour of urothelium, urothelium neoplasm, urothelium neoplasm (disease), urothelium tumor, urothelium tumour.