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Intraneural Ganglion Cyst of The Ulnar Nerve Causing Cubital Tunnel Syndrome: Two Case Reports.


 We present two cases of cubital tunnel syndrome caused by intraneural ganglia of the ulnar nerve at the elbow. This is a rare presentation for this type of ganglia, much more frequent at the peroneal nerve. An association between a history of trauma and the development of the synovial cyst is observed, therefore adequate preoperative imaging such ultrasound or MRI should be prescribed to better plan surgical treatment, in case of identified trauma. Drainage of the cyst and excision of its envelop under loupes magnification appears to be a correct and sufficient treatment when no articular nerve branch is found.