Axial image from a CECT obtained as part of a trauma work up demonstrates a crescentic collection inseparable from the right kidney, with mass effect on the renal parenchyma, containing regions of high attenuation. The right renal parenchyma enhances homogeneously. Findings are compatible with a subcapsular hematoma which falls under the spectrum of Grade 1 renal injuries, previously discussed here.
Harris AC, Zwirewich CV, Lyburn ID, et al. CT findings in blunt renal trauma. Radiographics 2001;21:S201-14.