Umbilical-urachal sinus

Last revised by Yoshi Yu on 20 Sep 2023

An umbilical-urachal sinus belongs to the spectrum of congenital urachal anomalies and represents a non-communicating dilatation of the urachus at the umbilical end.

Clinical presentation

Presentation is more common in children and rare in adults.

Radiographic features

An umbilical-urachal sinus can manifest at ultrasound as a thickened tubular structure along the midline below the umbilicus.

  • infection, with possible abscess formation

  • concurrent occurrence of a tumor.

History and etymology

It is thought to have been first described by Cabriolus in 1550 4.

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