(Fig 4-D.06) Hoffa’s Fat Pad Ganglion Cysts

https://youtu.be/VKUF1VAHTpo

https://youtu.be/YiEAI7pISIU

 

 

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📌 Hoffa’s Fat Pad Ganglion Cysts

• Ganglion cysts at the anterior knee are well-marginated masses filled with gelatinous material lacking synovial lining. 
• They are most commonly found in the Hoffa fat pad, typically adjacent to the anterior horn of the lateral meniscus .
• The mass can be large and expand the fat pad, resulting in symptoms of intra-articular impingement or limited motion.

 

✅ MRI Characteristics

• On MR imaging, ganglia appear as well-defined, uni- or multi-loculated, fluid-like T2 hyperintense lesions. 
• Depending on their protein content, ganglia may be hypo- or isointense on T1-weighted sequences. 
• An uncomplicated ganglion appears as a well-defined, homogeneous, non-enhancing fluid-filled collection on MRI. 
• Rupture or leakage of a ganglion can result in ill-defined adjacent edema.
• Ganglion cysts can be solitary or multiple, round or globular, multi- or uniloculated, and may demonstrate a neck or communication with adjacent joint spaces .

 

✅Differential Diagnosis

• An intrahoffatic lesion or a synovial lesion such as haemangioma or synovial sarcoma may be misinterpreted as a ganglion cyst within the fat pad. 

 

References

1. RadioGraphics 2018; 38:2069–2101
2. Osteoarthritis Cartilage. 2016 Mar;24(3):383-97
3. Indian J Radiol Imaging 2021;31:961–974
4. Insights Imaging (2013) 4:257–272

 

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