Cyste of Nuck

Cyste in the Canal of Nuck

Clinical information

This female patient discovered a small bulge in her left inguinal region.

Brief description

Ultrasound showed a hypoechoic cystic mass.
No recognizable peristalsis or vascular flow.
With Valsalva maneuver no changes in shape or size.
There is no visible communication to the peritoneal cavity.

Ultrasound Images & Clips


The portion of processus vaginalis within the inguinal canal in women is called the Canal of Nuck. It usually gets obliterated.
If completely patent it is a potential pathway for an indirect hernia or hydrocele.
In this case the cystic formation can be explained as fluid trapped in between both ends of the inguinal canal creating a Canal of Nuck cyst.


  • Sex: Female
  • Age: 48
  • Body part: Groin