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Updated: Feb 5, 2026

Knee Arthrocentesis in Adults
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[A boy with a twisted knee].

Jelmer E Oor1,2, W M P F Bosman1, Ph Wittich1

  • 1St. Antonius Ziekenhuis, afd. Traumachirurgie, Nieuwegein.

Nederlands Tijdschrift Voor Geneeskunde
|September 14, 2018
PubMed
Summary
This summary is machine-generated.

A knee injury in a 14-year-old boy, initially missed by X-rays, was diagnosed via ultrasound and MRI. The imaging revealed an osteochondral defect caused by patellar luxation, which was successfully treated with screws.

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Area of Science:

  • Orthopedic surgery
  • Pediatric orthopedics
  • Sports medicine

Background:

  • Knee injuries are common in adolescents.
  • Patellar luxation can lead to osteochondral defects.
  • Radiography is often insufficient for diagnosing subtle knee injuries.

Observation:

  • A 14-year-old male presented with acute knee pain and inability to extend his leg after a twisting injury.
  • Conventional radiography did not reveal any fracture.
  • Ultrasound and MRI demonstrated hemarthrosis and an osteochondral defect of the lateral femoral condyle.

Findings:

  • The osteochondral defect was attributed to patellar luxation.
  • The osteochondral fragment was successfully fixated.
  • Absorbable compression screws were utilized for fixation.

Implications:

  • Early and accurate diagnosis of osteochondral defects is crucial for optimal outcomes.
  • Advanced imaging modalities like MRI are essential for detecting such injuries.
  • Surgical fixation of osteochondral fragments ensures joint stability and function restoration in pediatric patients.