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📌 Synovial Low-Flow Vascular Malformation
- Synovial low-flow vascular malformation (formerly hemangioma) is a benign vascular malformation that typically occurs in the knee of children and young adults.
- This condition is often associated with pain and spontaneous hemarthrosis, causing significant discomfort and potential mobility issues.
✅ Radiographic Characteristics
- Radiographs of synovial low-flow vascular malformations may reveal calcified phleboliths.
- These calcified structures within the mass appear as intralesional T1 and T2 hypointensities and can be confirmed via radiography.
- On T2-weighted fat-suppressed images, the lesion is hyperintense with signal voids corresponding to abnormal vessels.
✅ MRI Features
- In MRI studies, synovial hemangiomas often show increased T2 signal intensity without a significant mass effect.
- Additional MRI features may include fibrofatty septa and muscular or fatty invasion.
- The administration of contrast material frequently demonstrates avid, rather homogeneous enhancement, which can help differentiate these malformations from cystic synovial hyperplasia.
References
- Radiographics. 2023 May;43(5)
- Osteoarthritis and Cartilage 24 (2016) 383e397
- Radiol Clin North Am. 2007 Nov;45(6):1017-31, vii
"Visualizing MSK Radiology: A Practical Guide to Radiology Mastery"
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#Radiology #VascularMalformation #SynovialHemangioma #KneePain #MedicalImaging #MRI #Radiographs #PediatricRadiology #OrthopedicRadiology #BenignTumors
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