urachal sinus https://www.malacards.org/card/urachal_sinus GARD:0021799 Orphanet:431344 MEDGEN:758682 MONDO:0018552 icd11.foundation:1174996735 SCTID:451030007 Urachal sinus is a type of congenital urachal anomaly resulting from the failure of the umbilical end of the urachus to close, without continuity to the bladder, and that is usually asymptomatic but can present with continuous cloudy umbilical discharge, tender midline infraumbilical mass and fever when infected. UMLS:C3472657 congenital urachal anomaly