Presentation
Rapidly enlarging mass in the left hip.
Patient Data
A subcutaneous soft tissue lesion is observed with well-defined margins, located in the lateral region of the left hip and in close contact with the fascia of the gluteus medius muscle.
The lesion appears hypointense on T1-weighted sequences and isointense relative to the muscle, with some hyperintense streaks. On T2-weighted sequences, it exhibits a heterogeneous signal, predominantly hyperintense. Following contrast administration, there is intense and nearly homogeneous enhancement.
There is no evidence of extension into the muscular planes or involvement of adjacent soft tissues.
Case Discussion
The lesion was biopsied, revealing it to be a myxoid liposarcoma, which is the second most common type of liposarcoma and is commonly seen in the buttocks or the thigh.
It consists of a variable amount of fat and myxoid material, and can sometimes be challenging to diagnose with MRI due to the lack of fat signal intensity.
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