📌 Semimembranosus-Gastrocnemius Bursa: Baker Cyst
- Normally enlarges along medial gastrocnemius muscle distally
- Can enter muscle compartment if fascial defect or weak region present
- Dissecting cyst may present as tender fullness below knee joint
- Rare instance of cyst present both outside and within muscle compartment
📌 Synovial Osteochondromatosis
- Benign synovial proliferative monoarticular disorder
- Hyaline cartilage nodules enlarge and detach from synovium over time
- Can be primary or secondary to trauma/arthritis
- Nodule size uniform in primary, variable in secondary disease
✅MRI signal depends on nodule composition:
- Chondroid: Isointense T1, high T2
- Calcified: Low T1, low T2
- Ossified with fatty marrow: High T1, high T2
Semin Musculoskelet Radiol. 2016 Feb;20(1):12-25
Radiographics. 2023 May;43(5):e220081
"Visualizing MSK Radiology: A Practical Guide to Radiology Mastery"
© 2022 MSK MRI Jee Eun Lee All Rights Reserved.
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#BakersCyst, #DissectingBakersCyst, #SynovialOsteochondromatosis, #SynovialDisorders, #CartilageNodules, #SignalCharacteristics, #MonoarticularDisorder #MuscleFascialDefect,
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