In the right supraclavicular fossa, in an extrapleural location, there is a triangular area of enhancing tissue measuring up 14.8 x 25.4 x 17.3 mm. This engulfs the right C8 and T1 nerve roots and the lower cord of the brachial plexus. Small amount of posterior disc-osteophyte complex seen at C5/6 and C6/7 which indents the ventral cord without causing cord signal abnormality.
Conclusion: There is a lesion visualised that would account for the patient's clinical presentation, namely a triangular area of enhancing tissue in the right supraclavicular fossa engulfing the right C8 and T1 nerve roots. It is uncertain if this represents radiation fibrosis or recurrent tumour. A PET scan may help differentiate.