4.4 x 2.1 x 2.2 cm enhancing focus present within the paraspinal musculature posterior to the l4-5 facet slightly hyperintense on the t2 and stir?

Varies : multiple potential causes. It is an area just under 1 inch by 2 inches that is near one of the facet joints in the muscle at the L4-5 level. Enhancement means that when contrast is given, the contrast fills the area indicating a good blood supply, which would typically rule out things like an abscess or cyst; Could simply be scar tissue; I could tell more by seeing directly, discuss with your md