eISSN: 1896-9151
ISSN: 1734-1922
Archives of Medical Science
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vol. 14
Letter to the Editor

18F-FDG PET/CT in the diagnosis of Takayasu’s arteritis

Gokhan Sargin, Taskin Senturk, Ongun Sahin

Arch Med Sci 2018; 14, 5: 1173–1174
Online publish date: 2018/06/01
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Takayasu’s arteritis (TA) is a chronic inflammatory vasculitis that predominantly affects the aorta, pulmonary artery and its main branches. The diagnostic criteria used by the American College of Rheumatology (ACR) include clinical signs that inflammatory and stenotic events. It may be difficult to diagnose TA according to the 1990 ACR Classification criteria despite high specificity and sensitivity [1]. Recently, studies have focused on the role of 18F-fluorodeoxyglucose (FDG)-positron emission tomography (PET)/computed tomography (CT) in the diagnosis of TA. 18F-FDG PET/CT may be useful to determine the degree of inflammation and affected areas. Here we present a 57-year-old male patient who was diagnosed with TA with FDG-PET in the early active inflammatory phase.
A 57-year-old male patient presented to our clinic with high fever lasting more than 6 months. His body temperature was 38.9°C, blood pressure was 165/80 mm Hg (right arm) and 140/65 mm Hg (left arm), and brachial artery pulse was 82/min on physical examination. He had no medical history of taking any drugs except ramipril. The laboratory results were as follows: hemoglobin: 10.5 g/dl, MCV: 71.8 fl, leukocytes: 15 890/mm3 (75% neutrophils), platelets: 562 000/mm3, erythrocyte sedimentation rate: 91 mm/h, C-reactive protein: 93.75 mg/dl, alanine aminotransferase: 40 U/l, total bilirubin: 0.3 mg/dl, albumin: 3.5 g/dl, globulin: 2.8 g/dl, creatinine: 0.98 mg/dl and procalcitonin: 0.28 ng/ml. Serum electrophoresis was compatible with polyclonal gammopathy. Urine examination, complements, Salmonella tube agglutination, Brucella tube agglutination, blood-urine cultures, autoimmune and viral serological markers were negative. The chest X-ray revealed no pathologic findings and increased echogenicity was detected around the infrarenal aorta by abdominal ultrasound. There was no evidence for decreased blood flow of the bilateral common, external and internal carotid artery, abdominal aorta or bilateral iliac arteries on magnetic resonance (MR) angiography.
18F-FDG PET/CT was planned in patient who had unexplained systemic inflammation, high fever, and hypertension. Images showed diffuse and increased FDG uptake (SUVmax: 9.1) in the bilateral common carotid artery, subclavian artery, arcus aorta, thoracic aorta, abdominal aorta, the common iliac arteries and femoral artery. 1 mg/kg/day prednisolone was started with the diagnosis of TA. Clinical symptoms improved after...

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