SUMMARY Aim: This study was conducted to measure the cross sectional area (CSA) of the ulnar nerve (UN) in the cubital tunnel and to evaluate the role of high-resolution ultrasonography in the diagnosis of ulnar nerve neuropathy (UNN). Materials and Methods This was a cross sectional study with 64 arms from 32 patients (34 neuropathic, 30 nonneuropathic). Diagnosis was confirmed by nerve conduction study and electromyography. The ulnar nerves were evaluated with 15MHz small footprint linear array transducer. The ulnar nerve CSA was measured at three levels with arm extended: at medial epicondyle (ME), 5cm proximal and 5cm distal to ME. Results from the neuropathic and nonneuropathic arms were compared. Independent T-tests and Pearson correlation tests were used. P value of less than 0.05 was considered significant. Results: Mean CSA values for the UN at levels 5cm proximal to ME, ME and 5cm distal to ME were 0.055, 0.109, 0.045 cm2 respectively in the neuropathic group and 0.049, 0.075, 0.042 cm2 respectively in the non-neuropathic group. The CSA of the UN at the ME level was significantly larger in the neuropathic group, with p value of 0.005. However, there was no statistical difference between the groups at 5cm proximal and distal to the ME, with p values of 0.10 and 0.35 respectively. Conclusion: There is significant difference in CSA values of the UN at ME between the neuropathic and non-neuropathic groups with mean CSA value above the predetermined 0.10cm2 cut-off point. High-resolution ultrasonography is therefore useful to diagnose and follow up cases of elbow UNN.
Ulnar Nerve

The supracondylar humerus fracture (SCHF) in children is common and can be complicated with nerve injury either primarily immediate post-trauma or secondarily posttreatment. The concept of neurapraxic nerve injury makes most surgeons choose to ‘watch and see’ the nerve recovery before deciding second surgery if the nerve does not recover. We report three cases of nerve injury in SCHF, all of which underwent nerve exploration for different reasons. Early reduction in the Casualty is important to release the nerve tension before transferring the patient to the operation room. If close reduction fails, we proceed to explore the nerve together with open reduction of the fracture. In iatrogenic nerve injury, we recommend nerve exploration to determine the surgical procedure that is causing the injury. Primary nerve exploration will allow early assessment of the injured nerve and minimize subsequent surgery.
Radial Nerve ; Ulnar Nerve

No abstract available in English.
Dislocations ; Ulnar Nerve ; Ulnar Neuropathies

Causes of ulnar nerve compression in Guyon's canal are various, but thrombosis of the ulnar artery due to a single trauma is rarely reported. We report a case of ulnar nerve compression caused by traumatic thrombosis of the ulnar artery in Guyon's canal. Surgical excision of the ulnar artery thrombus and end to end anastomosis resulted in complete relief of the patient's symptoms.
Thrombosis* ; Ulnar Artery* ; Ulnar Nerve ; Ulnar Nerve Compression Syndromes

We found a unique anatomical variant of the distal ulnar nerve, a neural loop encompassing the flexor carpi ulnaris during Guyon's canal exploration. Compression by the flexor carpi ulnaris during active wrist movement was suspected as the cause of ulnar neuropathy. The symptom was relieved after neurolysis and release of surrounding tissue. With regard to the ulnar side wrist pain, which is suspicious for ulnar compression syndrome at the wrist level, the surgeon should always suspect anomalous nerve branch as source of compressive neuropathic pain.
Neuralgia ; Ulnar Nerve Compression Syndromes ; Ulnar Nerve* ; Ulnar Neuropathies ; Wrist

The arcade of Struthers has been described as a possible cause of ulnar nerve compression in the elbow. This paper reports two cases of ulnar neuropathy caused by the arcade of Struthers. These observations demonstrated the importance of evaluation of the arcade of Struthers in atypical high ulnar nerve palsy.
Elbow* ; Ulnar Nerve Compression Syndromes ; Ulnar Nerve* ; Ulnar Neuropathies*

No abstract available.
Neurilemmoma* ; Ulnar Nerve*

No abstract available.
Neurilemmoma* ; Ulnar Nerve*

An intraneural hemangioma is an extremely rare condition. We report here on an intraneural hemangioma of the ulnar nerve. Microscopic exploration and excision of the lesion resulted in complete relief of the patient's symptoms.
Hemangioma ; Ulnar Nerve

This study reports a rare case of ulnar neuropathy around the arm with Martin-Gruber anastomosis of a moderate conduction block in the forearm segment and a severe conduction block in the arm segment. Inching tests and ultrasonography showed a lesion between 12 and 14 cm from the medial epicondyle. It is concluded that axilla stimulation may provide diagnostic clues, and inching tests and ultrasonography may be helpful for localizing a lesion.
Arm ; Axilla ; Forearm ; Ulnar Nerve ; Ulnar Neuropathies