Presentation
Painless swelling of the posteromedial aspect of the left thigh.
Patient Data
Age: 30 years
Gender: Female
From the case:
Slow flow venous malformation - intramuscular
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Well-defined lobulated intramuscular mass within the semimembranous muscle composed of numerous dilated serpiginous vascular structures isointense to muscle on T1, hyperintense on T2 and STIR with fluid-fluid levels. The post-contrast dynamic sequences show progressive enhancement with almost fill-in on delayed sequences.
Case Discussion
The MRI features are highly suggestive of soft tissue slow flow venous malformation, commonly known as soft tissue hemangiomas.
According to newer nomenclature (ISSVA classification of vascular anomalies), these lesions are referred to as slow-flow venous malformations.
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