Presentation
Right posterolateral thoracic wall painless mass sensation.
Patient Data
Age: 35 years
Gender: Female
From the case:
Intramuscular lipoma - latissimus dorsi
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Well-circumscribed, homogeneous high signal (T1/T2) mass measuring about 40*45*60 within the latissimus dorsi muscle on the right side that shows signal drop on fat suppression sequences
No evidence of thick septa, edematous changes, or local invasion.
Case Discussion
MRI features are highly suggestive of benign type intramuscular lipoma
The main differential diagnosis is liposarcoma: usually with thick septa, enhancement, or evidence of local invasion.