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A cyamella causing popliteal tendonitis.

N Rehmatullah1, R McNair, J Sanchez-Ballester

  • 1St Helens and Knowsley Teaching Hospitals NHS Trust, UK. nader.noddy@gmail.com.

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PubMed
Summary
This summary is machine-generated.

A sesamoid bone in the knee, known as a cyamella, can cause lateral knee pain mimicking a meniscal tear. This case highlights cyamella-associated popliteal tendonitis as a cause of knee pain.

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Area of Science:

  • Orthopedic Surgery
  • Sports Medicine
  • Radiology

Background:

  • Lateral knee pain is a common complaint, often attributed to meniscal pathology.
  • Differentiating causes of lateral knee pain is crucial for effective treatment.

Observation:

  • A 64-year-old male patient reported progressive, intermittent lateral knee pain.
  • Clinical presentation suggested a lateral meniscal tear.

Findings:

  • Magnetic resonance imaging (MRI) revealed a cyamella (a type of fabella) in the lateral knee.
  • The cyamella was associated with popliteal tendonitis.
  • The lateral meniscus was intact, ruling out a meniscal tear as the primary cause.

Implications:

  • The cyamella should be considered in the differential diagnosis of lateral knee pain, especially when meniscal pathology is suspected but not confirmed.
  • Popliteal tendonitis associated with a cyamella can present as significant knee pain.
  • Accurate radiological assessment is vital for identifying accessory ossicles like the cyamella and guiding appropriate management.