File:Carpometacarpal dislocation (Radiopaedia 33231-34261 Sagittal 7).png

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Summary:

Description
  • Radiopaedia case ID: 33231
  • Image ID: 10145696
  • Image stack position: 7/52
  • Plane projection: Sagittal
  • Study findings: The third to fifth metacarpals are dorsally dislocated from their articulations with the capitate and hamate. Alignment of the second metacarpal with the trapezoid and the first metacarpal with the trapezium is normal. There are fractures through the base of the third and fifth metacarpal bones. There is a fracture through the dorsal surface of the hamate, as well as a likely fracture through the dorsal surface of the capitate. There are multiple small fracture fragments that lie adjacent to the bases of the third to fifth metacarpals, most numerous around the base of the third metacarpal. Allowing for slight dorsi flexion at the wrist, alignment of the carpal bones is within normal limits. No distal radius or ulnar fracture. Volar plaster in situ.
  • Modality: CT
  • System: Musculoskeletal
  • Findings: There is dorsal dislocation of the third to fifth metacarpals at the carpometacarpal joints. On the lateral projection, there are two small osseous fragments that project dorsal to the distal carpal row. These presumably represent acute fracture fragments however the donor site is not clearly appreciated on these views.
Date Published: 28th Sep 2016
Source https://radiopaedia.org/cases/carpometacarpal-dislocation-1
Author Frank Gaillard
Permission
(Permission-reusing-text)		 http://creativecommons.org/licenses/by-nc-sa/3.0/

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Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0)

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