patent urachus (disease) HP:0010479 ICD10:Q64.4 MONDO:0018551 NCIT:C99005 Orphanet:431341 Patent urachus is a type of congenital urachal anomaly characterized by a persistent communication between the bladder and the umbilicus, secondary to non occlusion of the urachal lumen, manifesting as clear drainage from the umbilicus. SCTID:398316009 UMLS:CN237552 patent urachus congenital urachal anomaly