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[Apparent pseudarthrosis of the thumb]
D F Kalbermatten1, U von Wartburg
1Abteilung für Hand- und Plastische Chirurgie, Kantonsspital Luzern, Luzern. daniel.kalbermatten@bluewin.ch
Swiss Surgery = Schweizer Chirurgie = Chirurgie Suisse = Chirurgia Svizzera
|September 14, 2002
Summary
Pseudarthrosis, a fracture non-union, can be mistaken for dislocated bone fragments. This case highlights how osseous fragments near the thumb phalanx can mimic this condition, emphasizing diagnostic vigilance.
Area of Science:
- Orthopedic Surgery
- Hand Surgery
- Radiology
Background:
- Pseudarthrosis is defined as a fracture non-union persisting beyond six months.
- Common causes include biological factors, mechanical instability, or post-treatment infection.
- Effective treatment typically requires stable osteosynthesis and may involve bone grafting.
Observation:
- A case presented a dislocated osseous fragment.
- This fragment was attached to the Aponeurosis dorsalis.
- It mimicked clinical and radiological signs of pseudarthrosis in the proximal phalanx of the thumb.
Findings:
- Osseous fragments can present with clinical and radiological characteristics similar to phalangeal pseudarthrosis.
- The specific case involved a thumb proximal phalanx fracture with a mimicking fragment.
Implications:
- Highlights the importance of differentiating between true pseudarthrosis and osseous fragment displacement.
- Suggests careful radiological and clinical evaluation is crucial for accurate diagnosis in hand fractures.
- Emphasizes considering unusual presentations of bone fragments in hand surgery differential diagnoses.