Lunate dislocation
Diagnosis certain
Updates to Case Attributes
Status
changed from draft to published (public).
Published At
was set to
.
Body
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Lunate dislocation needs to be differentiated from trans-scaphoid perilunate dislocations. Both of these injuries are often overlooked and require prompt treatment.
-<p>Lunate dislocation needs to be differentiated from trans-scaphoid perilunate dislocations. </p>- +<p>Lunate dislocation needs to be differentiated from perilunate dislocations. Both of these injuries are often overlooked and require prompt treatment. </p>
Updates to Quizquestion Attributes
Question
was added:
What injury is present?
Answer
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There is a volar lunate dislocation.
Updates to Quizquestion Attributes
Question
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How does a lunate dislocation differ from a perilunate dislocation?
Answer
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In a lunate dislocation, the radiolunate articular is disrupted whereas in a perilunate dislocation the radiolunate articular is intact but the capitolunate articulation is disrupted.
Updates to Quizquestion Attributes
Question
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What is the mechanism of this injury?
Answer
was added:
High-energy forceful dorsiflexion of the wrist.
Updates to Study Attributes
Findings
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Volar lunate dislocation, without evidence of scaphoid fracture.
This indicates disruption of the scapholunate, lunotriquetral and dorsal radiocarpal ligaments.
The dislocated lunate invaginates the carpal tunnel and displaces the flexor tendons and neurovascular structures volarly.Tiny (2-2.5 mm) bony fragment lies immediately dorsal to the proximal pole of the capitate. Significant soft tissue swelling is noted throughout the carpus.
There is negative ulnar variance. Severe degenerative change noted at the 1st CMC joint.
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