RID35103 concentric ring sign

synonym target sign of kidney

definition Hypointense outer ring, hyperintense inner ring, and central mass of normal or variable intensity seen on kidney MR image. Outer and inner rings represent pseudocapsule and hemoglobin degradation, respectively. Suggests hematoma.

comment http://radiographics.rsna.org/cgi/content/full/24/suppl_1/S247