Hey there,

sounds interesting. Please assess the thoracic spine if you haven't already and see if there is any change with manual therapy to the area. Worth a shot if you haven't already. If it is a brachial plexus injury then it'll be slow like bobo said and you should be offering symptom relief as best you can. Did the CT cover the shoulder and thoracic spine? or just the Cx?

bit of food for thought there. Would love to hear how it all goes

Puddin