The workup for<unk>  frequently includes nerve conduction velocity studies to isolate and confirm the radial nerve as the source of the problem. Other screening tests include the inability to extend the thumb into a "hitchhiker's sign". Plain films can help identify bone spurs and fractures that may have injured the nerve. Sometimes MRI imaging is required to differentiate subtle causes.
Wrist drop
Foot drop
Pegleg
Rocker bottom foot
Planovalgus deformity
Freckle
Jammed finger
Ulnar deviation