Conclusion
Despite the low incidence of postoperative renal hematoma following kidney transplantation, it can have serious complications affecting the outcome of the graft and even the patient. When the renal hematoma is subscapular with a mass effect on the renal parenchyma and intrarenal hyperpressure, CDUS can show a falsely elevated RI, that can mimic ATN.
The mainstay of the treatment would be the emergent evacuation of the hematoma with postoperative imaging control.