Causes
Ulnar nerve at or near the elbow:
- Compression during the perioperative period
- Blunt trauma
- Deformities (e.g., rheumatoid arthritis)
- Metabolic derangements (e.g., diabetes)
- Transient occlusion of brachial artery during surgery
- Subdermal contraceptive implant
- Venipuncture
- Hemophilia leading to hematomas
- Malnutrition leading to muscle atrophy and loss of fatty protection across the elbow and other joints
- Cigarette smoking
Ulnar neuropathy at Guyon's canal
- Ganglionic cysts
- Tumors
- Blunt injuries with or without fracture
- Aberrant artery
- Idiopathic
Read more about this topic: Ulnar Neuropathy