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The femur is the body's longest and strongest bone spanning the thigh region. Its head articulates with the acetabulum of the hip bone to form the hip joint. A minor indentation on the medial side of the femoral head, called the fovea capitis, serves as the site of attachment for the ligament of the head of the femur. This weak ligament spans the femur and acetabulum and supports the hip joint. The narrowed region below the head is the neck of the femur. The inclination angle between the...
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Author Spotlight: Fu's Subcutaneous Needling for Knee Osteoarthritis Pain
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[A painful knee that cannot bend].

J Willems1, P W van Egmond

  • 1Deze casus werd eerder gepubliceerd in Skeletal Radiology (2017;46:259-64) met als titel 'Superior dislocation of the patella: a pathognomonic finding and review of literature'. Afgedrukt met toestemming.

Nederlands Tijdschrift Voor Geneeskunde
|August 24, 2017
PubMed
Summary
This summary is machine-generated.

A painful, locked knee in a 59-year-old woman was diagnosed as a superior patella dislocation. This rare condition was caused by hyperextension and indicated by specific X-ray findings.

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Area of Science:

  • Orthopedics
  • Radiology
  • Emergency Medicine

Background:

  • Superior patella dislocation is a rare knee injury.
  • It typically results from significant trauma, but can occur in unusual circumstances.

Observation:

  • A 59-year-old woman presented to the emergency room with a locked, painful right knee in extension.
  • The incident occurred during sleep due to unloaded hyperextension in bed.

Findings:

  • X-rays revealed interlocking patellofemoral osteophytes.
  • A superior patella dislocation, tilted away from the femur, was identified.
  • These findings are pathognomonic for superior patella dislocation.

Implications:

  • This case highlights an unusual mechanism for superior patella dislocation.
  • It underscores the importance of radiographic evaluation in diagnosing rare knee injuries.
  • Prompt diagnosis and management are crucial for optimal patient outcomes.