Spontaneous perirenal hematoma during coronary angiography

We report a case of spontaneous perirenal hematoma that developed acutely during an elective coronary angiography in a 65-year-old man with suspected coronary artery disease, probably related to the use of heparin during angiography. The patient did not have any systemic vasculitides and was not receiving antiplatelet or anticoagulant agents prior to the angiography. Serial follow-up high resolution CT scans with 2 mm cuts in the renal areas showed resolution of the hematoma but no underlying mass lesion or any other abnormality.