65-year-old female with left lateral hip mass. Evaluate for solitary fibrous tumor. Note is made of a 3.5 x 6.0 x 4.9 cm (TR by AP by CC) round encapsulated mass within the subcutaneous tissue along the lateral aspect of the left hip which demonstrates heterogeneous decreased T1 signal abnormality and heterogeneous increased signal abnormality on fluid sensitive sequences. There is heterogeneous but predominantly avid contrast enhancement. There is a large draining vein situated anteriorly. Additionally there is a large draining vein situated posterior to the aforementioned mass. No additional enhancing mass lesions are identified. There is no evidence of lymphadenopathy. There is mild fatty atrophy of the imaged musculature of the left hip. The musculature of the left hip otherwise appears normal. There is no bone marrow signal abnormality in the surrounding area.
Nonspecific 6.0 cm enhancing mass in the subcutaneous tissue along the lateral aspect of the left hip which appears similar to the prior examinations when allowing for differences in technique. Differential considerations include a solitary fibrous tumor/hemangiopericytoma with a soft tissue sarcoma considered a less likely possibility given the apparent stability.