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Unilateral fusion of the scaphoid and the trapezium
Alexander Robert Poublon1,2, Gerald Kraan2, Gert-Jan Kleinrensink1
1Department of Neuroscience and Anatomy, Erasmus MC, Rotterdam, Zuid-Holland, The Netherlands.
Abstract:
Fusion of the carpal bones is a rare anatomical abnormality, caused by a defect in the separation and cavitation during embryonic development. It has a prevalence of about 0.1% and most of the time, patients do not present with symptoms. Symptoms are usually caused by wear and tear of the ligaments attached to the fused carpal fragments. We present a case in which a woman aged 36 years experiences pain caused by a lunato-triquetral instability which in turn is caused by a unilateral complete fusion of the scaphoid and the trapezium. A unilateral complete fusion of the scaphoid and trapezium has not been reported before.
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