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Intramuscular myxoma

Case contributed by Ammar Haouimi
Diagnosis probable

Presentation

9 months history of progressive painless swelling of the anterolateral aspect of the right distal thigh.

Patient Data

Age: 30 years
Gender: Female
mri

There is a well-circumscribed lobulated soft tissue mass within the vastus lateral muscle, of low signal intensity on T1WI, high signal intensity on T2WI and STIR with a thin perilesional rim of fat, well-visualized on T1WI. On postcontrast sequences, there is a peripheral enhancement.

Case Discussion

MRI features highly suggestive of an intramuscular myxoma.

The differential diagnosis should include:

 

Additional contributor: A Ramdani, MD

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