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📌 Gastrocnemius Ganglia
- Gastrocnemius ganglia are cystic formations commonly found at the medial head of the gastrocnemius muscle.
- These ganglia are often multiseptated and can be detected through knee MRI.
✅ Extra-capsular ganglia at the gastrocnemius origin
- Extra-capsular ganglia at the gastrocnemius origin are frequently observed on knee MRI.
- They exhibit typical features of ganglia found at other sites. High-grade osteoarthritis has a significant association with the presence of extra-capsular ganglia.
✅ Classification of Ganglia
- Intra-capsular Ganglia: These cystic lesions protrude into the PCGU but remain confined to its most superficial margin.
- Extra-capsular Ganglia: These ganglia extend beyond the superficial margin of the PCGU.
✅ Developmental Stages of Ganglia
- Early Stage: A crescentic ganglion develops at the inner surface of the PCGU.
- Early-Intermediate Stage: The cyst within the intra-capsular location transforms into a rounded shape.
- Intermediate Stage: The rounded ganglion extends into the extra-capsular area.
- Intermediate-Late Stage: A multilobulate extra-capsular ganglion with internal septa and unclear intra-articular communication forms.
- Late Stage: The ganglion becomes encapsulated and remains extra-capsular, lacking intra-articular communication.
References
- Indian J Radiol Imaging. 2014 Apr;24(2):182-91
- Clinical Radiology 73 (2018) 835.e17e835.e25
"Visualizing MSK Radiology: A Practical Guide to Radiology Mastery"
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#GastrocnemiusGanglia, #KneeMRI, #HighGradeOsteoarthritis, #PCGU, #IntraCapsularGanglia, #ExtraCapsularGanglia, #GanglionDevelopment, #Radiology, #MusculoskeletalRadiology, #MedicalImaging
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