78-year-old female, follow for sarcoma Again seen is a large mass situated along the posterior compartment of the left mid thigh. The mass is decreased in transverse dimensions and slightly elongated and CC dimension, now measuring 15 cm in CC dimension and 5.2 x 5.6 cm in transverse dimensions (previously 11.2 x 9 x 7 cm). There has been interval cystic degeneration of the mass with multiple fluid fluid levels and no significant internal enhancement. The mass displaces the adjacent musculature. Mild edema and enhancement of the surrounding tissues particularly along the cranial most aspect of the mass may in part represent treatment effect. The underlying osseous structures appear normal, without evidence of disease involvement.
Interval cystic degeneration of the large posterior thigh mass consistent with treatment effect as described above. 