urachal sinus
MONDO:0018552Mondo
Findings
No curated finding names urachal sinus yet. Everything below is reference data from Mondo, HPO and GenCC, not evidence about what affects it.
Definition
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.
Definition from the Mondo Disease Ontology (MONDO:0018552), read 2026-09-29. CC BY 4.0.
Features
4 features
What the disease is reported to present with, and how often among people who have it — never how often a feature means the disease. HPO, annotations 2026-09-02.
- Abdominal painHPOHP:0002027
- Occasional (5% to 29% of cases)
- Abdominal wall massHPOHP:6000171
- Occasional (5% to 29% of cases)
- Bladder fistulaHPOHP:0004321
- Very rare (1% to 4% of cases)
- NeoplasmHPOHP:0002664
- Very rare (1% to 4% of cases)
Where it sits
- A kind of