Presentation
History of acute headache, neck pain and bilateral hand/wrist pain following an MVC.
Patient Data
Mildly displaced fracture through the ulnar sesamoid bone of the thumb. Moderate soft tissue swelling around the MCP joint of the thumb.
Case Discussion
A bipartite sesamoid bone is a normal anatomic variation of a sesamoid bone in which the sesamoid bone is in two pieces that is present from birth. Direct trauma to a bipartite sesamoid bone can present very similarly to a fracture of a sesamoid bone and can be difficult to distinguish from each other.
Imaging of a sesamoid fracture compared to a bipartite sesamoid will show irregular margins, possible comminution, and exaggerated separation of the fragments. In contrast, imaging features of a bipartite sesamoid include smooth, well-rounded borders and equally separated fragments 1.
Case Contributors
- Matthew E. Haskell, DO
- Tucker Jeppson, DO
- Ryan Glenndenning, DO
- Megan Chandran, DO
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