A 37-year-old woman, G2P2, presented to her local surgeon with a stabbing, right-sided abdominal pain, not associated with nausea or vomiting, that became progressively worse over several days. Her medical history included severe hypertension during her two pregnancies, which did not return to normal after her second pregnancy. Her current medications included olmesartan-hydrochlorothiazide, labetalol, and folic acid. Her serum creatinine was 0.56 mg/dL, and no hematuria was detected on urinalysis. A computed tomography angiography scan showed a right prehilar renal artery aneurysm, 21 × 16 × 17 mm that originated from the distal right renal artery and continued as the upper pole segmental artery. The base of the aneurysm incorporated the origin of a common trunk artery, which subsequently bifurcated into the segmental right middle and lower pole arteries (A). Indications for repair of the renal artery aneurysm in this patient included difficult-to-control hypertension, abdominal pain, and an aneurysm >2 cm in a patient of childbearing age. Owing to the complexity of the branched vessels, we reconstructed computed tomography data of the patient's aneurysm and reproduced a three-dimensional (3D) anatomic model using the rapid prototyping (RP) technique. The 3D model was used for accurate prediction of vascular anatomy, for optimal teaching of surgical skills, and for patient counseling (B and C). The patient underwent an open repair of the renal artery aneurysm using a reversed, bifurcated right great saphenous vein graft (D). Her postoperative course was unremarkable, with normal renal function, and she was discharged on postoperative day 6. Her antihypertensive medications were discontinued postoperatively. A renal artery duplex ultrasound scan confirmed a patent bypass graft. Written consent was obtained from the patient for publication of this report. The use of an anatomic model produced by 3D printing or the RP technique has been described for successful surgical planning of aortic valve replacement after previous coronary bypass grafting1Sodian R. Schmauss D. Markert M. Weber S. Nikolaou K. Haeberle S. et al.Three-dimensional printing creates models for surgical planning of aortic valve replacement after previous coronary bypass grafting.Ann Thorac Surg. 2008; 85: 2105-2108Abstract Full Text Full Text PDF PubMed Scopus (85) Google Scholar and complex aortic arch surgery.2Schmauss D. Juchem G. Weber S. Gerber N. Hagl C. Sodian R. Three-dimensional printing for perioperative planning of complex aortic arch surgery.Ann Thorac Surg. 2014; 97: 2160-2163Abstract Full Text Full Text PDF PubMed Scopus (58) Google Scholar The integration of RP techniques with a reconstruction based on computer-aided design model 3D medical imaging data provides a complementary tool for making a truly patient specific replica of the structure with high accuracy.3Håkansson A. Rantatalo M. Hansen T. Wanhainen A. Patient specific biomodel of the whole aorta - the importance of calcified plaque removal.Vasa. 2011; 40: 453-459Crossref PubMed Scopus (35) Google Scholar To our knowledge, this is the first implementation and clinical application in complex reconstruction of a renal artery aneurysm described in the vascular surgery literature.