Monteggia fracture
Pronunciation: mon-TEG-ee-uh
A fracture of the ulnar shaft with dislocation of the radial head, requiring careful radiographic assessment.
Full Definition
A Monteggia fracture is a specific pattern of forearm injury consisting of a fracture of the ulnar shaft combined with dislocation of the radial head. This injury pattern is particularly important in pediatric patients because the radial head dislocation may be subtle and easily missed if the radiocapitellar line is not carefully assessed on all radiographic views. The injury is classified by the direction of radial head dislocation (anterior, posterior, or lateral). Early recognition is crucial as missed Monteggia fractures can lead to significant long-term complications including chronic instability, nerve injury, and limited range of motion.
Usage
Usage note: Always assess the radiocapitellar line on all views to avoid missing the dislocation component.
In Context
- "The radiocapitellar line failed to pass through the capitellum, confirming a Monteggia fracture pattern." — pediatric forearm radiograph
- "What initially appeared to be an isolated ulnar fracture was recognized as a Monteggia lesion on review." — emergency department imaging