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Related Experiment Videos

Sarcoidosis presenting as prepatellar bursitis.

Hajime Fujimoto1, Ryota Shimofusa, Katsuhito Shimoyama

  • 1Department of Radiology, Numazu City Hospital, Numazu, Shizuoka, Japan. hfujimot@lilac.ocn.ne.jp

Skeletal Radiology
|August 13, 2005
PubMed
Summary

Subcutaneous sarcoidosis can mimic prepatellar bursitis in imaging. This case highlights the importance of pathological examination for accurate diagnosis of knee masses.

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Area of Science:

  • Orthopedics
  • Dermatology
  • Radiology

Background:

  • Prepatellar bursitis is a common cause of knee swelling.
  • Magnetic Resonance (MR) imaging is a key diagnostic tool for knee masses.

Observation:

  • A 61-year-old woman presented with a subcutaneous knee mass.
  • MR imaging showed a well-defined lesion with fluid and T2 foci, suggesting bursitis.
  • Contrast enhancement was noted, further supporting bursitis.

Findings:

  • Pathological examination revealed subcutaneous sarcoidosis involving the prepatellar bursa.
  • The imaging findings were initially consistent with prepatellar bursitis.

Implications:

  • This case underscores that sarcoidosis can present as a knee mass mimicking bursitis.

Related Experiment Videos

  • Accurate diagnosis requires integrating imaging findings with histopathological analysis.
  • Consider sarcoidosis in the differential diagnosis of subcutaneous knee lesions.