PA and lateral views.

(4) What would be your next step? Do you need further workup, or would you proceed with treatment of her pain?

The differential lidocaine injection has implicated the dorsal compartment as the likely source for her pain. One could proceed with an exploratory surgery, but it would be prudent to get a CT scan to avoid surprises in the OR.

(5) What do you think is the most likely diagnosis?

Screw impingement on a tendon, with tendon fraying.

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