07-21-2014, 12:59 PM
A 10-year-old boy is brought to the pediatrician by his mother because he has been complaining of difficulty using his right hand. She states that he has had a fever for several days now but that she grew more concerned when he was unable to extend his wrist at the breakfast table today. On examination, he is found to have a right wrist drop and some difficulty with shoulder abduction. A thorough workup reveals a soft tissue mass in the right shoulder. Ultrasonography is suggestive of an abscess. Which of the following structures is most likely being compressed by the abscess?
A. Anterior division of middle trunk
B. Medial cord
C. Nerve root of C3-C5
D. Posterior cord
E. Radial nerve
A. Anterior division of middle trunk
B. Medial cord
C. Nerve root of C3-C5
D. Posterior cord
E. Radial nerve