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📌 Septic Bursitis
✅ Overview and Causes
- Septic bursitis at the anterior knee can be hematogenous but is more often iatrogenic or related to a penetrating injury.
- The presence of a draining sinus tract, intrabursal gas, or foreign bodies in the bursa suggests infection, but aspiration is recommended whenever infection is suspected .
✅ Imaging Findings
- There is usually enhancement of the bursal wall and surrounding tissues following administration of gadolinium-based intravenously administered contrast medium.
- However, the infected bursal contents typically do not enhance .
- If there is enhancement of the overlying skin, then accompanying cellulitis is invariably present. Unfortunately, there is a considerable overlap between the imaging findings of septic and nonseptic bursitis .
📌 Chronic Bursitis
- Chronic bursitis sometimes results in dramatic bursal enlargement, producing a large mass that extends well beyond the patellar borders, associated with wall thickening, loculation, and internal debris.
- This appearance is difficult to distinguish from bursal infection, as both can contain heterogeneous debris and have thickened walls that enhance after contrast material administration .
References
- RadioGraphics 2018; 38:2069–2101
- Skeletal Radiol (2010) 39:957–971
- RadioGraphics 2016; 36:1888–1910
"Visualizing MSK Radiology: A Practical Guide to Radiology Mastery"
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#SepticBursitis, #ChronicBursitis, #Radiology, #MRI, #MusculoskeletalImaging, #Infection, #KneeInjury, #MedicalImaging, #BursalDisease, #GadoliniumContrast
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