A 20-year-old female has a mid shaft humeral fracture. Assessment reveals the presence of wrist drop. What should you suspect?

### D) radial nerve injury

## Step1: Identify the symptoms### The patient has a mid shaft humeral fracture and wrist drop. Wrist drop is a condition where the patient is unable to extend the wrist due to weakness or paralysis.## Step2: Correlate the symptoms with possible causes### The radial nerve runs along the humerus, and a fracture in the mid shaft of the humerus can potentially cause injury to the radial nerve. This can lead to symptoms such as wrist drop.## Step3: Make a diagnosis based on the correlation### Given the symptoms and their correlation with the radial nerve, we can suspect that the patient has a radial nerve injury.