Trapezium exostosis

Case contributed by Dr Roberto Schubert

Presentation

Incidental finding during MRI to rule out an occult wrist fracture.

Patient Data

Age: 40
Gender: Male
MRI

There is an unusual distal bony process of the os trapezium in continuation with the volar trapezial ridge. Don't think it's an osteophyte, for there is no osteoarthritis of the trapezio-metacarpal joint. Differential: developmental variant, enthesiophyte at the flexor pollicis brevis origin, osteochondroma (only 1 literature report to date). Let's call it trapezium cornutum for the horn-like appearance on the coronal sections.

Comments welcome.

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Case information

rID: 16815
Case created: 22nd Feb 2012
Last edited: 30th Oct 2015
Inclusion in quiz mode: Included

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