[Bony and ligamentous injuries of the thumb ray].

Fractures and ligamentous lesions of the thumb ray are frequent due to the exposed position of the thumb. A thorough anatomical understanding with respect to the joints and stabilizing ligaments is essential for a targeted examination, the selection of appropriate imaging diagnostics and the decision for a surgical or conservative treatment approach. Misdiagnoses or untreated injuries can lead to impaired functionality, pain and instability, which can substantially impair the function of the hand, particularly thumb opposition.