Read the stem and answer the questions which follow.

A 56 year old director of a drug rehabilitation centre presented with a non-traumatic, subacute, painful, right sided lower cervical radiculopathy. As well as a weak hand and C8-T1 sensory loss, she complained of “electric current shocks” from the clavicle to the both knees, and interscapular pain with coughing. There were no constitutional symptoms, heart murmurs, fever, or peripheral blood inflammatory markers. Two samples of imaging are illustrated—a post gadolinium …