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International Journal of Case Reports in Orthopaedics
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2025, Vol. 7, Issue 2, Part E

Guyon’s canal syndrome due to intraneural lipoma of the ulnar nerve: A case reporta


Author(s): Catarina Paias Gouveia, Diogo Magueijo, Diogo Conduto, Artur Nixon Martins and Diogo Magueijo

Abstract: Intraneural lipomas are rare benign tumors that grow inside peripheral nerves and can cause compression symptoms. When they occur in Guyon’s canal, they may lead to ulnar neuropathy, similar to more common conditions like cubital tunnel syndrome. A 56-year-old woman presented with a painless swelling in her right hand and numbness in the ring and little fingers. MRI showed a well-defined fatty mass extending from the distal forearm through Guyon’s canal into the palm and thenar region, consistent with an intraneural lipoma of the ulnar nerve. The lesion was completely removed under regional anesthesia while preserving nerve fascicles. Histology confirmed a spindle cell lipoma. At 8 months after surgery, the patient had full recovery of hand strength and sensation, with no recurrence. Intraneural lipoma of the ulnar nerve is a rare cause of compression at the wrist. MRI is key for diagnosis, and complete surgical removal usually leads to excellent recovery.

DOI: 10.22271/27078345.2025.v7.i2e.300

Pages: 281-283 | Views: 53 | Downloads: 22

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International Journal of Case Reports in Orthopaedics
How to cite this article:
Catarina Paias Gouveia, Diogo Magueijo, Diogo Conduto, Artur Nixon Martins, Diogo Magueijo. Guyon’s canal syndrome due to intraneural lipoma of the ulnar nerve: A case reporta. Int J Case Rep Orthop 2025;7(2):281-283. DOI: 10.22271/27078345.2025.v7.i2e.300


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