Imaging Report With Radiologic Criteria for Differentiation: Avulsion Fracture or Os Triquetrum Secundarium?

Lyubomir Gaydarski1,2, Kristina Petrova1, Lukasz Olewnik2,3

  • 1Department of Anatomy, Histology, and Embryology, Medical University-Sofia, Sofia, BGR.

Cureus
|November 7, 2025
PubMed
Summary

Accessory ossicles, like the os triquetrum secundarium (OTS), are rare wrist variants. Recognizing OTS on imaging is crucial to prevent misdiagnosis of fractures and unnecessary treatments for ulnar-sided wrist pain.

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