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Imaging Features of Systemic Sclerosis-Associated Interstitial Lung Disease

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PET/CT imaging in systemic lupus erythematosus.

Rodolfo Curiel¹, Esma A Akin, Gregory Beaulieu

¹Division of Rheumatology, Department of Medicine, The George Washington University Medical Center, Washington, District of Columbia, USA. rcuriel@mfa.gwu.edu

Annals of the New York Academy of Sciences

|July 2, 2011

Summary

Positron emission tomography with fluorine-18 fluorodeoxyglucose (FDG PET/CT) effectively visualizes inflammation in systemic lupus erythematosus (SLE). This imaging tool aids in assessing disease activity and predicting outcomes in SLE patients.

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Area of Science:

Immunology
Nuclear Medicine
Radiology

Background:

Systemic lupus erythematosus (SLE) is a complex immune-complex disease with potential for severe organ damage.
Kidney and brain involvement in SLE contribute significantly to patient morbidity and mortality.
Current imaging modalities are essential for evaluating inflammatory conditions in SLE.

Purpose of the Study:

To evaluate the utility of fluorine-18 fluorodeoxyglucose ([(18)F]FDG PET/CT) in assessing disease activity in systemic lupus erythematosus (SLE).
To explore the role of [(18)F]FDG PET/CT in identifying inflammation and predicting prognosis in SLE patients.

Main Methods:

Utilizing [(18)F]FDG PET/CT to target increased glucose metabolism in activated immune cells like granulocytes, macrophages, and lymphocytes.
Assessing FDG uptake in lymphoid organs, including lymph nodes and the thymus, in patients with active SLE.
Identifying patterns of cerebral metabolism, specifically parieto-occipital hypometabolism, in patients with neuropsychiatric SLE (NP-SLE).

Main Results:

[(18)F]FDG PET/CT demonstrates high sensitivity in delineating inflammatory processes by targeting heightened glucose uptake.
Widespread increased FDG uptake was observed in lymph nodes and the thymus of active SLE patients.
Parieto-occipital hypometabolism emerged as a significant finding in neuropsychiatric SLE.

Conclusions:

[(18)F]FDG PET/CT is a valuable ancillary tool for evaluating disease activity in SLE.
This imaging technique can aid in assessing the prognosis of SLE patients.
PET/CT offers insights into the inflammatory burden and specific organ involvement in SLE.