(18)F-fluorodeoxyglucose positron emission tomography/computed tomography comparison of gastric lymphoma and gastric carcinoma.
OBJECTIVE
To compare (18)F-fluorodeoxyglucose positron emission tomography/computed tomography ((18)F-FDG PET/CT) features in gastric lymphoma and gastric carcinoma.


METHODS
Patients with newly diagnosed gastric lymphoma or gastric carcinoma who underwent (18)F-FDG PET/CT prior to treatment were included in this study. We reviewed and analyzed the PET/CT features of gastric wall lesions, including FDG avidity, pattern (focal/diffuse), and intensity [maximal standard uptake value: (SUVmax)]. The correlation of SUVmax with gastric clinicopathological variables was investigated by χ(2) test, and receiver-operating characteristic (ROC) curve analysis was performed to determine the differential diagnostic value of SUVmax-associated parameters in gastric lymphoma and gastric carcinoma.


RESULTS
Fifty-two patients with gastric lymphoma and 73 with gastric carcinoma were included in this study. Abnormal gastric FDG accumulation was found in 49 patients (94.23%) with gastric lymphoma and 65 patients (89.04%) with gastric carcinoma. Gastric lymphoma patients predominantly presented with type I and type II lesions, whereas gastric carcinoma patients mainly had type III lesions. The SUVmax (13.39 ± 9.24 vs 8.35 ± 5.80, P < 0.001) and SUVmax/THKmax (maximal thickness) (7.96 ± 4.02 vs 4.88 ± 3.32, P < 0.001) were both higher in patients with gastric lymphoma compared with gastric carcinoma. ROC curve analysis suggested a better performance of SUVmax/THKmax in the evaluation of gastric lesions between gastric lymphoma and gastric carcinoma in comparison with that of SUVmax alone.


CONCLUSIONS
PET/CT features differ between gastric lymphoma and carcinoma, which can improve PET/CT evaluation of gastric wall lesions and help differentiate gastric lymphoma from gastric carcinoma.
Xiao-Feng Li, Qiang Fu, You-Wen Dong, Jian-Jing Liu, Xiu-Yu Song, Dong Dai, Cong Zuo, Wen-Gui Xu, Department of Molecular Imaging and Nuclear Medicine, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China.
Xiao-Feng
XF
Li
Xiao-Feng Li, Qiang Fu, You-Wen Dong, Jian-Jing Liu, Xiu-Yu Song, Dong Dai, Cong Zuo, Wen-Gui Xu, Department of Molecular Imaging and Nuclear Medicine, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China.
Qiang
Q
Fu
Xiao-Feng Li, Qiang Fu, You-Wen Dong, Jian-Jing Liu, Xiu-Yu Song, Dong Dai, Cong Zuo, Wen-Gui Xu, Department of Molecular Imaging and Nuclear Medicine, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China.
You-Wen
YW
Dong
Xiao-Feng Li, Qiang Fu, You-Wen Dong, Jian-Jing Liu, Xiu-Yu Song, Dong Dai, Cong Zuo, Wen-Gui Xu, Department of Molecular Imaging and Nuclear Medicine, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China.
Jian-Jing
JJ
Liu
Xiao-Feng Li, Qiang Fu, You-Wen Dong, Jian-Jing Liu, Xiu-Yu Song, Dong Dai, Cong Zuo, Wen-Gui Xu, Department of Molecular Imaging and Nuclear Medicine, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China.
Xiu-Yu
XY
Song
Xiao-Feng Li, Qiang Fu, You-Wen Dong, Jian-Jing Liu, Xiu-Yu Song, Dong Dai, Cong Zuo, Wen-Gui Xu, Department of Molecular Imaging and Nuclear Medicine, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China.
Dong
D
Dai
Xiao-Feng Li, Qiang Fu, You-Wen Dong, Jian-Jing Liu, Xiu-Yu Song, Dong Dai, Cong Zuo, Wen-Gui Xu, Department of Molecular Imaging and Nuclear Medicine, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China.
Cong
C
Zuo
Xiao-Feng Li, Qiang Fu, You-Wen Dong, Jian-Jing Liu, Xiu-Yu Song, Dong Dai, Cong Zuo, Wen-Gui Xu, Department of Molecular Imaging and Nuclear Medicine, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China.
Wen-Gui
WG
Xu
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002277:Carcinoma / Q000000981:diagnostic imaging* / Q000473:pathology; D002648:Child; D005260:Female; D019788:Fluorodeoxyglucose F18 / Q000737:chemistry; D006801:Humans; D008228:Lymphoma, Non-Hodgkin / Q000000981:diagnostic imaging* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D000072078:Positron Emission Tomography Computed Tomography / Q000379:methods*; D012372:ROC Curve; D019275:Radiopharmaceuticals / Q000737:chemistry; D013274:Stomach Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D055815:Young Adult
D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18
18F-fluorodeoxyglucose positron emission tomography/computed tomography; Differential diagnosis; Gastric carcinomas; Gastric lymphomas; Maximal standard uptake value; Maximal thickness
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