s meet the patient.
A 7-year-old girl with recently diagnosed hypertension, ulcerative colitis, and a history of Henoch-Schönlein purpura presented to the emergency department with headache, chest pain, abdominal pain, and an elevated blood pressure of 173/121 mm Hg in her right upper extremity.
Physical examination findings were significant for weak left carotid, brachial, and radial pulses and bilateral carotid bruits. Renal ultrasonography with Doppler was performed, the results of which were concerning for renal artery stenosis, and electrocardiography findings suggested ventricular hypertrophy.
Multiple antihypertensive agents were successively started, resulting in a slow reduction but not normalization of her blood pressure. An echocardiogram showed normal biventricular function, mild aortic root dilation, aortic insufficiency, and a diffusely dilated left coronary artery. The erythrocyte sedimentation rate (ESR) and the C-reactive protein (CRP) level were found to be elevated to 24 mm/h and 27 mg/L, respectively, raising concern for a diffuse inflammatory process.
Additional angiography of her brain, chest, and abdominal vasculature was performed, revealing significant narrowing of the left common, external, and internal carotids, and of the bilateral subclavian, hepatic, splenic, and renal arteries; celiac axis narrowing; asymmetric kidney size; and diffuse thickening of the aorta from the heart through the abdomen, with a bright wall signal (Figure).
Answer: Takayasu arteritis
These imaging findings, together with evidence of systemic inflammation, confirmed a diagnosis of Takayasu arteritis (TA) type V, the most extensive form.
Answer: Stenosis or aneurysm of the aorta
TA is a rare yet well-described large-vessel vasculitis with a predilection for the aorta and its primary branches. The diagnosis is made clinically according to the EULAR/PRINTO/PRES criteria, which include stenosis or aneurysm of the aorta or its primary large vessel branches on angiography, not due to fibromuscular dysplasia or arteriosclerosis, as well as at least 1 of the following: hypertension, bruits, blood pressure discrepancies between limbs, pulse deficits or claudication, or elevated ESR or CRP.1,2
The acute inflammation of TA causes nonspecific constitutional symptoms, which can lead to delay in diagnosis, and sequelae include aortic aneurysms and dissection, stricture formation, hypertension, stroke, and end-organ ischemic damage.3-5
The etiology of TA is unknown. However, there have been case reports of TA in patients with comorbid inflammatory bowel disease,6 such as our patient.
Answer: Methylprednisolone pulse
The patient was started on a methylprednisolone pulse followed by maintenance prednisone, with normalization of her ESR and CRP prior to discharge. Treatment options focus on preventing disease progression. There is no consensus on regimen, but high-dose pulse corticosteroid therapy is favored for induction.
Nevertheless, she continued to have episodic hypertension associated with headaches and abdominal pain.
Are you correct? >>
Answer: Renal arterioplasty
The patient subsequently underwent right renal arterioplasty as an outpatient, which led to marked symptomatic improvement and reduction of her antihypertensive regimen.
She was successfully started on the disease-modifying agents methotrexate and infliximab, and her corticosteroids were tapered.
Long-term therapy includes immunosuppressants and biologics such as cyclophosphamide, mycophenolate mofetil, methotrexate, infliximab or tocilizumab, as well as revascularization surgery.4,7
Disease recurrence is common, and mortality rates can range from 16% to 40%.7-9 Therefore, prompt identification and treatment is imperative to prevent further morbidity and mortality.
Authors and references >>
Authors:
Alexandra Mihalek, MD, and Alexander Parisky, MD
Department of Pediatrics, Children’s Hospital Los Angeles, California
Allyson McDermott, MD
Division of Hospital Medicine, Children’s Hospital Los Angeles, California
Bracha Shaham, MD
Division of Rheumatology, Children’s Hospital Los Angeles, California
Citation:
Mihalek A, Parisky A, McDermott A, Shaham B. Takayasu arteritis in a child [published online July 3, 2017]. Consultant for Pediatricians. https://www.consultant360.com/article/takayasu-arteritis-child.
References:
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