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Manabe Y, Norikane T, Yamamoto Y, Murao M, Shimada H, Wakiya R, Nakashima S, Dobashi H, Nishiyama Y. [ 18F] FDG uptake in patients with spondyloarthritis: correlation with serum inflammatory biomarker levels. EJNMMI Res 2023; 13:15. [PMID: 36792786 PMCID: PMC9931986 DOI: 10.1186/s13550-023-00964-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 02/05/2023] [Indexed: 02/17/2023] Open
Abstract
BACKGROUND We aimed to evaluate the correlation between 2-deoxy-2-[18F]fluoro-D-glucose (FDG) uptake and disease activity assessed by serum inflammatory biomarker levels in patients with spondyloarthritis (SpA). METHODS A total of 36 SpA patients (24 untreated and 12 treated) were examined using FDG positron emission tomography (PET)/computed tomography and classified into axial SpA (axSpA) and peripheral SpA (pSpA). FDG uptake was evaluated in 23 regions of the body and scored as follows: 0 = less than liver uptake; 1 = more than or equal to liver uptake; and 2 = more than or equal to twice liver uptake. A score of 1 or 2 was considered positive. The number of positive regions and the total score were counted in each patient. The maximum standardized uptake value (SUVmax) was calculated for each region, and maximum SUVmax (MaxSUVmax) was used as a representative value. Correlation of PET findings with serum inflammatory biomarker levels, including C-reactive protein (CRP), erythrocyte sedimentation rate, and matrix metalloproteinase 3 (MMP-3), was analyzed. RESULTS All but two patients had at least one positive lesion. PET indices correlated significantly with most of the serum inflammatory biomarker levels in untreated SpA, but not in treated SpA. Further, MaxSUVmax, number of positive regions, and total score correlated significantly with CRP (all P values < 0.001), and the number of positive regions (P = 0.012) and total score (P = 0.007) correlated significantly with MMP-3 in untreated pSpA. PET indices did not correlate with any serum inflammatory biomarker level in untreated axSpA. CONCLUSION FDG uptake in untreated pSpA correlated significantly with serum inflammatory biomarker levels.
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Affiliation(s)
- Yuri Manabe
- Department of Radiology, Faculty of Medicine, Kagawa University, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa, 761-0793, Japan.
| | - Takashi Norikane
- grid.258331.e0000 0000 8662 309XDepartment of Radiology, Faculty of Medicine, Kagawa University, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa, 761-0793 Japan
| | - Yuka Yamamoto
- grid.258331.e0000 0000 8662 309XDepartment of Radiology, Faculty of Medicine, Kagawa University, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa, 761-0793 Japan
| | - Mitsumasa Murao
- grid.258331.e0000 0000 8662 309XDepartment of Radiology, Faculty of Medicine, Kagawa University, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa, 761-0793 Japan
| | - Hiromi Shimada
- grid.258331.e0000 0000 8662 309XDivision of Hematology, Rheumatology and Respiratory Medicine, Department of Internal Medicine, Faculty of Medicine, Kagawa University, Kagawa, Japan
| | - Risa Wakiya
- grid.258331.e0000 0000 8662 309XDivision of Hematology, Rheumatology and Respiratory Medicine, Department of Internal Medicine, Faculty of Medicine, Kagawa University, Kagawa, Japan
| | - Shusaku Nakashima
- grid.258331.e0000 0000 8662 309XDivision of Hematology, Rheumatology and Respiratory Medicine, Department of Internal Medicine, Faculty of Medicine, Kagawa University, Kagawa, Japan
| | - Hiroaki Dobashi
- grid.258331.e0000 0000 8662 309XDivision of Hematology, Rheumatology and Respiratory Medicine, Department of Internal Medicine, Faculty of Medicine, Kagawa University, Kagawa, Japan
| | - Yoshihiro Nishiyama
- grid.258331.e0000 0000 8662 309XDepartment of Radiology, Faculty of Medicine, Kagawa University, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa, 761-0793 Japan
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