Clinical analysis of renal artery branch lesions caused by fibromuscular dysplasia in children / 中华实用儿科临床杂志

ABSTRACT

Objective To explore the lesion types of renal branches and evaluate the clinical results of endovascular treatment for renal artery branch lesions associated with fibromuscular dysplasia (FMD).Methods Eight cases with renal artery branch lesions due to FMD from June 2014 to December 2015 in Department of Vascular and Endovascnlar Surgery,Henan Provincial People's Hospital were retrospectively reviewed.The computed tomography angiography was routinely performed to ascertain the property of renal artery lesion,and digital-subtraction angiography was further performed to confirm FMD diagnosis and analyze lesion characteristics.The renal artery branch lesion types,blood pressure (BP),renin activity,glomerular filtration rate (GFR) and restenosis after operation were observed,and the outcomes were recorded.Results In 8 patients,6 patients were found with the second grade renal branch lesions and 2 patients were found with tertiary branch lesions,involving 2 and more branch arteries for 4 cases and 1 branch for 4 cases.Five cases with branch-type cystic dilatation or aneurysms with coexisting stenosis including 1 case with dissecting aneurysm and renal local infarction,and 1 case with aneurysm located in the bifurcations of branches,and 3 cases with only branch stenosis were found.The angiography showed the small branch lesions of renal artery indicating FMD-mediated focal (5 cases) and multiple stenosis (3 cases).The branch stenosis was not operated in 1 case with dissecting aneurysm and renal local infarction,as BP could be controlled by antihypertensive treatment.Other 7 cases underwent endovascular angioplasties and the technical successful rate was 100％ without complications.After 1 week of operation,BP was improved,renal function remained normal,plasma renin activity was reduced and GFR was recovered for all patients.During the follow-up period (3 to 12 months),BP improvement was observed in 3 cases,and cure were found in 4 cases,and patient's GFR and plasma renin activity were improved in all patients.There were 2 cases with re-intervention during the follow-up period due to restenosis,and the involved branches were unobstructed without obvious stenosis after 1-year follow-up.Conclusions FMD can affect the renal branch artery with different lesions types and endovascular treatment is the first choice for the renal branch lesion of FMD.