METHODS :
The decompression surgery was carried out under general anesthesia ,a pulsatile structure was found coming from the ulnar artery and constricting the ulnar nerve (figure 3) .
The aneurysm was carefully removed and the ulnar artery was ligaturated after a favorable allen test.(figure 4).
CONCLUSION AND RESULTS  :
The postopertive course was uneventful and the patient’s symptoms immediately imrovedwas pain free.
After three months the patient was pain free , progressively gaining his hand function and very satisfied with the procedure.