MRI and 18F-FDG-PET/CT findings of cervical reactive lymphadenitis: a comparison with nodal lymphoma.

Polish journal of radiology Pub Date : 2025-01-10 eCollection Date: 2025-01-01 DOI:10.5114/pjr/196644
Hiroki Kato, Tomohiro Ando, Yusuke Kito, Hirofumi Shibata, Takenori Ogawa, Takuya Seko, Masaya Kawaguchi, Yoshifumi Noda, Fuminori Hyodo, Masayuki Matsuo
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引用次数: 0

Abstract

Purpose: This study aimed to compare the findings of magnetic resonance imaging (MRI) and 18F-fluorodeoxyglucose (FDG)-positron emission tomography/computed tomography (PET/CT) to differentiate reactive lymphadenitis from nodal lymphoma of the head and neck.

Material and methods: This study included 138 patients with histopathologically confirmed cervical lymphadenopathy, including 35 patients with reactive lymphadenitis and 103 patients with nodal lymphoma, who had neck MRI (n = 63) and/or 18F-FDG-PET/CT (n = 123) before biopsy. The quantitative and qualitative MRI results and maximum standardised uptake value (SUVmax) were retrospectively analysed and compared between the 2 pathologies.

Results: The maximum diameter (22.4 ± 6.9 vs. 33.3 ± 16.0 mm, p < 0.01), minimum diameter (15.8 ± 3.6 vs. 22.3 ± 8.5 mm, p < 0.01), and SUVmax (6.9 ± 2.7 vs. 12.8 ± 8.0, p < 0.01) of the lesion were lower in reactive lymphadenitis than in nodal lymphoma, respectively. T2-hypointense-thickened capsules > 2 mm (46% vs. 14%, p < 0.05) and T2-hypointense areas converging to the periphery (15% vs. 0%, p < 0.05) were more frequently observed in reactive lymphadenitis than in nodal lymphoma, respectively. Hilum of nodes on T2-weighted images (54% vs. 22%, p < 0.05) and diffusion-weighted images (69% vs. 30%, p < 0.05) were more frequently demonstrated in reactive lymphadenitis than in nodal lymphoma, respectively.

Conclusions: Reactive lymphadenitis had a smaller size and lower SUVmax. The presence of T2-hypointense-thickened capsules, T2-hypointense areas converging to the periphery, and hilum of nodes were signs of reactive lymphadenitis.

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