Os paratrapezium

Last revised by Sarah John on 14 Nov 2021

Os paratrapezium is an accessory ossicle located between distal radial aspect of the trapezium and the base of the 1st metacarpal 1

Differential diagnoses include loose bodies secondary to trapreziometacarpal joint osteoarthritis or secondary to trauma (e.g. Bennett's fracture) 2

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Cases and figures

  • Case 1 - annotated image
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  • Case 2
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