Abstract
Moyamoya disease (MMD) has long been known to be associated with hypertension. While renal artery stenosis (RAS) is considered one of the causes of hypertension with MMD, most hypertension causes remain unexplained. A boy with MMD was diagnosed with renovascular hypertension (RVH) due to left-sided RAS by angiography. Although nephrectomy on the affected side for unilateral RVH was performed, hypertension poorly improved. Histopathological examination of the resected specimens revealed that the vascular lumen not only of the renal artery but also of peripheral vessels in the renal parenchyma was narrowed. He developed end-stage renal disease caused by multiple wasp stings and received a kidney transplant from a living donor with his remaining right kidney resected. His hypertension improved dramatically just after the operation. In histopathological findings, the narrowed vascular lumen was also observed in the resected right renal parenchyma similar to that in the left kidney. In our case, these pathological findings were the same as those of major vessels previously reported in MMD patients. Immunohistochemical staining with anti-renin antibody on bilateral intrinsic kidneys was strongly revealed in the Juxtaglomerular apparatus. He has been normotensive with the minimum amount of amlodipine since transplantation and resection of his intrinsic right kidney. This is the first report to show the possibility that peripheral arterial stenosis in the renal parenchyma due to MMD would result in refractory hypertension. If MMD patients have hypertension of unknown origin without significant RAS, it should be considered that the etiology may be peripheral arterial stenosis in the renal parenchyma.
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Inaguma, Y., Kaito, H., Yoshida, M. et al. Moyamoya disease with refractory hypertension associated with peripheral arterial stenosis in the renal parenchyma. CEN Case Rep 10, 506–509 (2021). https://doi.org/10.1007/s13730-021-00594-x
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DOI: https://doi.org/10.1007/s13730-021-00594-x