Presentation
9 months history of progressive painless swelling of the anterolateral aspect of the right distal thigh.
Patient Data
Age: 30 years
Gender: Female
From the case:
Intramuscular myxoma
{"current_user":null,"step_through_annotations":true,"access":{"can_edit":false,"can_download":true,"can_toggle_annotations":true,"can_feature":false,"can_pin":false},"extraPropsURL":"/studies/75649/annotated_viewer_json?iframe=true\u0026lang=us"}
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