At the proximal left femoral metaphysis and diaphysis, a 4.6 x 14.3 cm intramedullary mass demonstrates predominantly isointense T1 and high T2 signal with respect to muscle, with an area of bony sclerosis and septation at its distal aspect. There are areas of mild patchy internal contrast enhancement, and features suggestive of bony expansion. No internal fluid-fluid levels, cortical breech or adjacent soft tissue mass identified. There is sparing of the femoral head.
A smaller, slightly ill-defined intramedullary lesion of
similar signal characteristics is identified (incompletely seen) at the
superoposterior acetabulum, measuring.
This also does not demonstrate cortical breech or an
adjacent
soft tissue mass.