Pes planus - disrupted cyma line

Case contributed by Henry Knipe
x-ray

Pes planus alignment, note the disrupted cyma line with anteroinferior translation of the talonavicular joint. 

Annotated image

Cyma line highlighted in red, note the loss of the usual "lazy S" appearance. 

Case Discussion

Disruption of the cyma line can occur in pes planus and midtarsal injuries

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