radiocapitellar line
An imaginary line drawn through the radial neck and head that should pass through the capitellum on all radiographic views.
Full Definition
The radiocapitellar line is a crucial anatomic reference used in pediatric elbow imaging to assess for radial head dislocation. This imaginary line is drawn through the long axis of the radial neck and head and should pass through the center of the capitellum on all radiographic projections (AP, lateral, and oblique). Disruption of this relationship indicates radial head dislocation, which may be associated with Monteggia fractures, lateral condyle fractures, or congenital radioulnar synostosis. Careful assessment of the radiocapitellar line is essential in pediatric elbow trauma to avoid missing subtle dislocations that can have significant long-term consequences.
Usage
Usage note: Must be assessed on all radiographic views; critical for detecting subtle radial head dislocations.
In Context
- "The radiocapitellar line passed through the capitellum on all views, excluding radial head dislocation." — pediatric elbow radiograph interpretation
- "Disruption of the radiocapitellar line on the lateral view indicated posterior dislocation of the radial head." — trauma imaging assessment