Irreducible, incarcerated vertical dislocation of patella into a Hoffa fracture

Area of Science:

• Orthopedic Surgery
• Traumatology
• Radiology

Background:

• Rotational patellar dislocations are uncommon and challenging to manage non-surgically.
• These injuries can involve associated osteochondral and retinacular damage.
• A motorcycle accident precipitated the presented case.

Purpose of the Study:

• To report a unique case of rotational patellar dislocation with a concurrent Hoffa fracture.
• To discuss the diagnostic challenges, injury mechanism, and optimal management strategies.
• To highlight the limitations of closed reduction for this specific injury pattern.

Main Methods:

• Case report of a 20-year-old male with acute knee injury.
• Computed tomography (CT) scan for detailed radiological evaluation.
• Surgical intervention (open reduction) for management.

Main Results:

• Diagnosis of a vertically rotated patellar dislocation incarcerated within a Hoffa fracture.
• Confirmation of a rare combined knee injury pattern.
• Successful management through open reduction (implied by recommendation).

Conclusions:

• Rotational patellar dislocations with Hoffa fractures represent a rare and complex orthopedic emergency.
• Open reduction is the preferred treatment method for this specific injury.
• Early diagnosis and surgical intervention are crucial for favorable outcomes.