A 43-year-old man was involved in a violent quarrel with his wife over another woman. In a fit of rage, the wife picked up a carving knife and lunged forward at her husband, striking his anterior neck over the left clavicle. The husband collapsed on the kitchen floor, bleeding profusely from the wound. The distraught wife called an ambulance.
-On examination in the emergency department of the hospital, the following conditions were found except which?

Question

Quizplus · Accepted Answer

The lower trunk of the brachial plexus was cut by the knife. This would explain the loss of movement of the small muscles of the left hand. It would also explain the loss of skin sensation that occurred in the $\mathrm{C} 8$ and $\mathrm{Tl}$ dermatomes on the medial not on the lateral side of the left forearm and hand. The knife had also pierced the left dome of the cervical pleura, causing a left pneumothorax with left-sided diminished breath sounds and a deflection of the trachea to the left.

A 43-Year-Old Man Was Involved in a Violent Quarrel with His