PS-R07-6: RENOVASCULAR HYPERTENSION SECONDARY TO MASSIVE ILIOPSOAS HEMATOMA

Abstract

An 81-year-old female with stage G3 chronic kidney disease and post left nephrectomy for upper tract urothelial carcinoma 20 years ago, was admitted to our hospital for heart failure. She acutely developed right thigh pain, and contrast-enhanced computed tomography (CT) revealed an idiopathic iliopsoas hematoma for which transcatheter arterial embolization (TAE) was performed. Subsequently, her hypertension worsened despite multiple antihypertensive medications (Nifedipine, Carvedilol, Doxazosin, Spironolactone), remained uncontrolled over one month. At this point, plasma renin activity and plasma aldosterone concentration were both elevated on taking carvedilol and spironolactone. An angiotensin II receptor blocker (ARB, Olmesartan) was additionally started for refractory hypertension. Oliguric acute kidney injury (AKI) developed on the day following ARB administration, and her serum creatinine increased from 0.98 to 2.0 mg/dL. After stopping the ARB, the kidney function immediately recovered to the previous level. On review of the previously performed contrast CT, the remnant (right) kidney was ventrally displaced, and the right renal artery was kinked by the massive iliopsoas hematoma (Figure 1a and 1b). Three months after TAE, the hematoma completely disappeared, and the right kidney and renal artery returned to their original positions. Renal Doppler ultrasonography before the appearance, and after the disappearance of hematoma, demonstrated no abnormalities indicative of renal artery stenosis. Furthermore, hypertension also improved over the three months after TAE. Renal artery stenosis is primarily caused by atherosclerosis, fibromuscular dysplasia, and rarely external compression. We report a rare case of renovascular hypertension which would be induced by renal artery kinking due to massive iliopsoas hematoma. JOURNAL/jhype/04.03/00004872-202301001-01329/figure1/v/2023-10-24T163949Z/r/image-jpeg