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Canal of Nuck cyst MRI and CT findings — Canal of Nuck cyst MRI and CT

Pathophysiology of the Canal of Nuck

Extension of the parietal peritoneum follows the round ligament as it passes to the inguinal canal.
Usually gets obliterated.
This evagination of the parietal peritoneum = the canal of Nuck = female counterpart of processus vaginalis in men.
If it is:
- Completely patent: Avenue for an indirect inguinal hernia and hydrocele (Canal of Nuck hernia).
- Obliterated at the level of both the superficial and deep inguinal rings: Fluid may be trapped in between both ends of the canal, creating a Canal of Nuck cyst.
- Obliterated at lower end – Infantile hydrocele / encysted hydrocele.
Hydrocele vs cyst canal of Nuck : The terms hydrocele and cyst of Canal of Nuck are used interchangeably but these are separate pathologies.
Symptoms: It usually presents as a painless swelling in the inguinal region. Infection can cause pain.

Imaging appearances:

Canal of Nuck cyst is an inguinal cyst in females.
US : Cystic lesion in the inguinal canal with posterior acoustic attenuation.
CT : Hypodense lesion with our without internal septations.
MRI: T1 isointense, T2 hyperintense, typical appearance of a cystic lesion.
Can show peripheral enhancement.

Differentials for Canal of Nuck cyst

Inguinal hernia containing fluid in patients with ascites.
Soft tissue tumor.
Endometriosis cyst
Cyst
Abscess
Lymphadenopathy

Management:

Surgical excision or conservative management depending on patient presentation.

Detailed video with PACS based case images:

https://www.youtube.com/watch?v=ql8yhhr6_gA&feature=youtu.be

Cyst and Hydrocele of Canal Of Nuck || Radiology Shots || Short Radiology Cases || Round 1 (https://www.youtube.com/watch?v=ql8yhhr6_gA&feature=youtu.be)

Canal of Nuck Cyst CT and MRI findings

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About the Author

Dr. Amar Udare, MD, DNB

Dr. Amar Udare is a board-certified radiologist. He is currently working as a fellow radiologist at McMaster University, Canada. He has a passion for teaching (#FOAMrad and #FOAMed) and has been a semi-finalist for the 2018 and 2020 Aunt-Minnie Most effective Radiology Educator Awards. He has authored multiple peer-reviewed publications which can be accessed on PubMed and Google Scholar.

Canal of Nuck Cyst

Pathophysiology of the Canal of Nuck

Imaging appearances:

Differentials for Canal of Nuck cyst

Management:

Detailed video with PACS based case images:

Share this with your friends and colleagues on social media!

About the Author

Dr. Amar Udare, MD, DNB

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Pathophysiology of the Canal of Nuck

Imaging appearances:

Differentials for Canal of Nuck cyst

Management:

Detailed video with PACS based case images:

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About the Author

Dr. Amar Udare, MD, DNB

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