MRCP-0619
A 35-year-old woman was on a camping holiday in Spain. She awoke at three o’clock one morning with severe neck pain radiating down into her left shoulder and down to her forearm. The next day it spread to the dorsal aspect of the forearm. She was otherwise well. Her symptoms resolved after 24 hours. She noticed that after a week she was unable to wind down the car window with her left arm. On examination of the left arm there was wasting of brachioradialis, shoulder, biceps and winging of left scapula. What is the diagnosis?