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Inicio Revista Española de Medicina Nuclear e Imagen Molecular (English Edition) 18F-FDG PET/CT for the detection of large vessel vasculitis in patients with pol...
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Vol. 34. Issue 5.
Pages 275-281 (September - October 2015)
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Vol. 34. Issue 5.
Pages 275-281 (September - October 2015)
Original Article
18F-FDG PET/CT for the detection of large vessel vasculitis in patients with polymyalgia rheumatica
18F-FDG PET/TAC en pacientes con polimialgia reumática y sospecha de vasculitis de grandes vasos asociada
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C. Lavado-Péreza, I. Martínez-Rodrígueza,
Corresponding author
mimartinez@humv.es

Corresponding author.
, N. Martínez-Amadora, I. Banzoa, R. Quircea, J. Jiménez-Bonillaa, M. De Arcocha-Torresa, Z. Bravo-Ferrera, M. Jiménez-Alonsoa, J.L. López-Defillóa, R. Blancob, M.A. González-Gayb, J.M. Carrila
a Department of Nuclear Medicine, Molecular Imaging Group (IDIVAL), Marqués de Valdecilla University Hospital, University of Cantabria, Santander, Spain
b Department of Rheumatology, Marqués de Valdecilla University Hospital, University of Cantabria, Santander, Spain
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Tables (5)
Table 1. Patient characteristics.
Table 2. Intensity of 18F-FDG uptake and vascular regions in the 26 patients with large vessel vasculitis.
Table 3. 18F-FDG uptake in each of the 26 patients with large vessel vasculitis according to the different vascular regions evaluated.
Table 4. Intensity of 18F-FDG uptake and vascular regions in the 14 patients with a final diagnosis of no large vessel vasculitis.
Table 5. 18F-FDG uptake in each of the 14 patients with a final diagnosis of no large vessel vasculitis according to the different vascular regions evaluated.
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Abstract
Purpose

Polymyalgia rheumatica (PMR) may present together with large vessel vasculitis (LVV), and frequently requires a more intensive therapy. The aim of the study was to evaluate the impact of 18F-FDG PET/CT in the diagnosis and management of LVV associated to PMR.

Material and methods

This prospective study included 40 consecutive patients (27 women/13 men, 68.10±10.27 years) with PMR and suspicion of associated LVV submitted for 18F-FDG PET/CT. A PET/CT scan was obtained 180min after 18F-FDG intravenous injection. A visual analysis was performed on the images. Five vascular regions were evaluated: supra-aortic trunks (SAT), thoracic aorta (TA), abdominal aorta (AA), iliac arteries (IA), and femoral/tibioperoneal arteries (FTA). The intensity of uptake was graded from 0 to 3. A final diagnosis of LVV was established in 26/40 patients (65%).

Results

In the 26 patients with a diagnosis of LVV, the highest intensity of 18F-FDG uptake was observed in the TA, SAT, and FTA. All of these patients showed uptake at the TA, with grade 2 and 3 in most cases. In 4 of the 14 patients without LVV, no uptake was observed in any vascular region, and in the other 10 patients only a grade 1 uptake was observed in 1 or to 2 territories. Out of the 20 treated LVV patients, 18F-FDG PET/CT led to a therapeutic change in 17 (85%).

Conclusion

18F-FDG PET/CT was useful in identifying patients with LVV associated to PMR. The detection of vascular inflammation had an important impact, and led to a change of treatment in a high percentage of patients with LVV.

Keywords:
Polymyalgia rheumatica
Large vessel vasculitis
Aortitis
Giant cell arteritis
18F-FDG PET/CT
Positron emission tomography
Resumen
Objetivo

La polimialgia reumática (PMR) puede presentarse asociada a vasculitis de grandes vasos (VGV), necesitando frecuentemente una intensificación del tratamiento. Nuestro objetivo fue evaluar el impacto de la 18F-FDG PET/TAC en el diagnóstico y tratamiento de VGV asociada a PMR.

Material y métodos

Este estudio prospectivo incluyó 40 pacientes consecutivos (27 mujeres/13 hombres, 68,10±10,27 años) con PMR y sospecha de VGV asociada evaluados con 18F-FDG PET/TAC. Los estudios PET/TAC fueron obtenidos 180 minutos después de la inyección intravenosa de 18F-FDG. Se realizó un análisis visual de la intensidad de captación (0–3) en troncos supraaórticos (TSA), aorta torácica (AT), aorta abdominal (AA), arterias ilíacas (AI) y arterias femoro/tibioperoneales (AFT). Se estableció un diagnóstico final de VGV en 26/40 pacientes (65%).

Resultados

En los 26 pacientes con diagnóstico de VGV la mayor intensidad de captación de 18F-FDG se objetivó en AT, TSA y AFT. En todos ellos se observó captación en la AT, principalmente grado 2 y 3. En 4 de los 14 sin VGV no se visualizó captación en ninguna región vascular y en los otros 10 solo se observó captación grado 1 en uno o 2 territorios. De los 20 pacientes con VGV previamente tratados, la 18F-FDG PET/TC motivó un cambio terapéutico en 17 (85%).

Conclusiones

La 18F-FDG PET/TAC fue una herramienta útil para identificar pacientes con VGV asociada a PMR. La detección de inflamación vascular tuvo un importante impacto, motivando un cambio de tratamiento en un alto porcentaje de los pacientes con VGV.

Palabras clave:
Polimialgia reumática
Vasculitis de grandes vasos
Aortitis
Arteritis de células gigantes
18F-FDG PET/TAC
Tomografía por emisión de positrones

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