(Fig 5-E.06) Intracapsular Locations of Tophi, Gout

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📌Intracapsular Locations of Tophi

• Tophi can be found in several intracapsular locations, including the medial infrapatellar fat pad, anterior joint recess, popliteal groove, and intercondylar notch.

 

✅ MRI Features of Gout

• The MRI features of gout are variable.
• Tophi exhibit intermediate or low signal intensity on T1-weighted images and heterogeneous signal intensity on T2-weighted or fluid-sensitive sequences, possibly due to varying amounts of calcium present.

 

✅ MRI Morphologic Patterns of Gouty Tophi

• Amorphous Crystalline-like Tophi: The most common pattern, reflecting the traditional concept of soft-tissue urate deposition.
• Cystic Masses in Bursae: The second pattern shows cystic masses in the bursae without evidence of tophaceous lesions in the knee.
• Linear Crystalline-like Deposits: The final pattern features linear tissue of crystalline-like deposits floating in the joint effusion.

 

References

• RadioGraphics 2018; 38:2069–2101
• AJR 2013; 201:515–525
• J Clin Rheumatol. 2010 Aug;16(5):209-14

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#Gout, #Tophi, #MRI, #Radiology, #InfrapatellarFatPad, #JointRecess, #PoplitealGroove, #IntercondylarNotch, #TophaceousGout, #CrystallineDeposits