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Patient presenting with left ankle pain and a medially deviated subtalar joint axis. However, patient also exhibiting pes cavus in right foot (elevated arch, claw toes) with an awkward gait where the right foot is 'swung out' despite an adequate range of dorsiflexion when non weight bearing.
The patient has had previous surgery to repair a right ruptured quadriceps femoris; could this have caused the pes cavus?
Any ideas?

 

Think neurological origin until proven otherwise.

 

Yes, quite. I just don't want to be rushing him off for further investigation if it's likely to have been caused by the quadriceps surgery.
The fact that it's unilateral is making me think it's not CMT disease but not sure what other conditions may produce this.

 

Have you tested muscle strength?

 

I've booked him in for another appointment to carry out a more in depth assessment. Based on an initial assessment, though, muscle strength appeared to be good.