Interpretation and Application of Guideline of Lymphoma
Value of 18F-FDG PET/CT in the interim therapeutic and prognostic evaluation of primary gastrointestinal lymphoma
Qiao Wenli, Chen Xiang, Liu Changcun, Wang Taisong, Xing Yan, Zhao Jinhua
Published 2022-04-25
Cite as Chin J Nucl Med Mol Imaging, 2022, 42(4): 202-208. DOI: 10.3760/cma.j.cn321828-20220209-00036
Abstract
ObjectiveTo assess the value of 18F-FDG PET/CT imaging and relevant factors in the interim therapeutic and prognostic evaluation of primary gastrointestinal lymphoma (PGIL) patients.
MethodsFrom January 2008 to January 2018, 41 patients with B-cell PGIL (24 males, 17 females; age: 26-84 years) confirmed by pathology in Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine were retrospectively included. 18F-FDG PET/CT was performed before chemotherapy and radiotherapy and after 3-4 courses of chemotherapy. There were 17 cases of mucosa-associated lymphoid tissue (MALT) lymphoma and 24 cases of diffuse large B-cell lymphoma (DLBCL). Mann-Whitney U test was used to compare the differences of metabolic parameters (SUVmax, metabolic tumor volume (MTV), total lesion glycolysis (TLG)) before treatment between MALT lymphoma and DLBCL patients. ROC curve analysis was used to analyze the predictive abilities of different parameters for progression-free survival (PFS), and Cox regression analysis was used to analyze the influencing factors for PFS.
ResultsThe median follow-up time of 41 patients was 25 (6-84) months, with the 3-year PFS rate of 55.9% and the overall survival (OS) rate of 80.2%. The baseline SUVmax (23.2±11.9), MTV (260.7(66.2, 740.7) cm3) and TLG (1 902.9(592.2, 8 418.1) g) in DLBCL were significantly higher than those in MALT lymphoma (7.9(6.2, 9.8), 45.9(28.4, 104.2) cm3, 121.1(72.8, 295.6) g; z values: -4.02, -3.10, -3.92, all P<0.05). ΔSUVmax in DLBCL patients (AUC=0.80, P=0.012), ΔSUVmax% (AUC=0.89, P=0.007; AUC=0.80, P=0.012), ΔMTV%(AUC=0.91, P=0.005; AUC=0.77, P=0.026) and ΔTLG% (AUC=0.87, P=0.011; AUC=0.77, P=0.026) in MALT lymphoma and DLBCL patients before and after treatment were predictive factors of PFS. Multivariate analysis showed that ΔSUVmax% was an independent factor for PFS of MALT lymphoma (hazard ratio (HR)=17.192, 95% CI: 2.035-145.245, P=0.009), while ΔMTV% and ΔTLG% were factors for PFS of DLBCL (both HR=7.556, 95% CI: 1.968-29.016, P=0.003).
ConclusionsThere are significant differences in metabolic parameters between MALT lymphoma and DLBCL before treatment. Interim PET/CT is effective for the prediction of prognosis of MALT lymphoma and DLBCL.
Key words:
Lymphoma, B-cell, marginal zone; Lymphoma, large B-cell, diffuse; Gastrointestinal tract; Positron-emission tomography; Tomography, X-ray computed; Fluorodeoxyglucose F18; Prognosis
Contributor Information
Qiao Wenli
Department of Nuclear Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, China
Chen Xiang
Department of Nuclear Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, China
Liu Changcun
Department of Nuclear Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, China
Wang Taisong
Department of Nuclear Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, China
Xing Yan
Department of Nuclear Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, China
Zhao Jinhua
Department of Nuclear Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, China