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Metaphyseal nonunion: a diagnostic dilemma
N A Ebraheim1, M C Skie, B E Heck
1Department of Orthopedic Surgery, Medical College of Ohio, Toledo 43699.
The Journal of Trauma
|February 1, 1995
Summary
Diagnosing metaphyseal nonunion in fractures is challenging, often presenting with subtle symptoms and normal X-rays. Advanced imaging like stress views and fluoroscopy are crucial for accurate identification.
Area of Science:
- Orthopedic Surgery
- Radiology
- Bone Healing Research
Background:
- Metaphyseal nonunion, a failure of fracture healing in the metaphysis, presents diagnostic challenges.
- Initial fracture healing may be presumed, with nonunion symptoms often being mild and localized.
Purpose of the Study:
- To evaluate the diagnostic challenges and methods for metaphyseal nonunion.
- To highlight the limitations of conventional imaging and the utility of advanced techniques.
Main Methods:
- Retrospective evaluation of 28 patients with metaphyseal nonunion.
- Analysis of diagnostic imaging modalities including routine roentgenograms, tomograms, stress views, and fluoroscopy.
Main Results:
- Routine roentgenograms and tomograms were often unhelpful due to hardware overlap and false callus impression.
- Stress views and fluoroscopy proved reliable, especially for knee region nonunions.
- Diagnosis was frequently delayed (average 36 weeks) and missed even after revision surgery.
Conclusions:
- Metaphyseal nonunion diagnosis requires a high index of suspicion across all age groups.
- Advanced imaging techniques like stress views and fluoroscopy are recommended for difficult cases.
- Nonunion is not as rare as previously thought and presents significant diagnostic hurdles.