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12.11.2019 | Brief Report | Ausgabe 4/2020

Clinical Rheumatology 4/2020

Role of positron emission tomography in the assessment of disease burden and risk of relapse in patients affected by giant cell arteritis

Zeitschrift:
Clinical Rheumatology > Ausgabe 4/2020
Autoren:
Mattia Bellan, Erinda Puta, Alessandro Croce, Gian Mauro Sacchetti, Federica Orsini, Erika Zecca, Daniele Soddu, Francesco Gavelli, Gian Carlo Avanzi, Luigi Castello, Roberta Pedrazzoli, Daniele Sola, Mario Pirisi, Pier Paolo Sainaghi
Wichtige Hinweise
The data included herein have been presented at the EULAR Annual Meeting 2019 and published in abstract form in: Croce A, Bellan M, Pedrazzoli R, et al. AB1132 THE ROLE OF PET/CT IN THE MANAGEMENT OF GIANT CELL ARTERITIS Annals of the Rheumatic Diseases 2019;78:2029.

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Abstract

Giant cell arteritis (GCA) is characterized by two subsets: cranial GCA and large-vessel GCA (LV-GCA); positron emission tomography (PET) is an essential tool in the diagnosis of LV-GCA. In this study, we aimed to investigate its potential prognostic value in the stratification of relapse risk. We retrospectively revised all the clinical records of patients who received a diagnosis of GCA at an immuno-rheumatology clinic of a University Hospital along 6 years and who underwent to a PET-CT examination at diagnosis. Clinical, laboratory, and imaging data were collected. Relapses were recorded. The study population included 19 patients (10 females, 52.6%; median age 74.0 [65.5–76.0] years), 12 with typical cranial GCA (63%) and 7 (37%) with LV-GCA. Based on PET findings, a diagnosis of aortitis was made in 15/19 patients, including 8/12 patients with a classical cranial GCA (58%). Along a median follow-up of 15 months [4.5-26.5], 4 relapses were observed. All relapsers were male; indeed, the difference in gender distribution was the only variable reaching statistical difference between relapsers and non-relapsers. Specifically, aortitis was not more frequent among relapsers. Our study confirms PET as a valid tool in the identification of LV-GCA with no cranial involvement. We failed to demonstrate a role for PET in the prognostic stratification of GCA, while male gender is suggested as a potential risk factor for GCA relapse.
Key Points
• A significant proportion of patients with GCA presents with non-cranial disease, the identification of which requires imaging studies, among which PET is particularly useful.
• Aortitis might be detected also in patients with the classical, cranial GCA type but does not seem to have prognostic implications, at least in terms of relapse risk.
• Male gender is suggested as a risk factor for relapse in GCA.

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