The First People's Hospital of Yunnan Province, PET/CT Center, 157 Jinbi Road, Xishan District, Kunming, 650100, Yunnan, People's Republic of China.
Yunnan Cancer Hospital, PET/CT Center, 519 Kunzhou Road, Xishan District, Kunming, 650100, Yunnan, People's Republic of China.
Abdom Radiol (NY). 2021 Dec;46(12):5574-5585. doi: 10.1007/s00261-021-03286-3. Epub 2021 Sep 21.
To characterize and investigate PET/CT findings in the omentum in the differentiation of tuberculous peritonitis (TBP) and peritoneal carcinoma (PC).
Thirty-nine patients with TBP and 113 patients with PC who underwent PET/CT were retrospectively enrolled. The omental uptake intensity, distribution characteristics, contracture, size and boundary of soft-tissue lesions, and CT patterns were reviewed.
Absent and focal FDG uptake in the lesser omentum was more common in the PC patients (P = 0.034 and P = 0.017, respectively), and diffuse FDG uptake in the lesser omentum was more common in the TBP patients (P < 0.001). An apron-like pattern in the greater omentum commonly occurred in the TBP patients (P = 0.004). Micronodules (< 5 mm) were more common in the TBP patients (P < 0.001), and masses (> 3 cm) were more common in the PC patients (P = 0.001). Smudged and nodular patterns occurred more frequently in the TBP patients than in the PC patients (P < 0.001 and P = 0.003, respectively), and the caked pattern occurred more frequently in the PC patients (P < 0.001). There was no significant difference in the FDG uptake intensity and the boundary of soft-tissue lesions between the TBP and PC patients (P = 0.191 and P = 0.061, respectively).
Diffuse FDG uptake, an apron-like pattern, micronodules, and a smudged and nodular pattern might be significant differential features of TBP. Absent and/or focal FDG uptake, mass, and a caked pattern might be significant differential features of PC.
描述并研究体层摄影术（PET）/计算机断层扫描（CT）在鉴别结核性腹膜炎（TBP）和腹膜癌（PC）中网膜表现。
回顾性分析 39 例 TBP 和 113 例 PC 患者的 PET/CT 资料，观察网膜摄取强度、分布特征、收缩、软组织病变大小和边界以及 CT 模式。
PC 患者小网膜无摄取和局灶摄取（P=0.034 和 P=0.017）较 TBP 患者更常见，而小网膜弥漫摄取在 TBP 患者中更常见（P<0.001）。大网膜围裙样表现常见于 TBP 患者（P=0.004）。TBP 患者微结节（<5mm）更常见（P<0.001），PC 患者肿块（>3cm）更常见（P=0.001）。TBP 患者模糊结节样表现比 PC 患者更常见（P<0.001 和 P=0.003），而饼样表现则更常见于 PC 患者（P<0.001）。TBP 和 PC 患者间网膜摄取强度和软组织病变边界无显著差异（P=0.191 和 P=0.061）。
弥漫性 FDG 摄取、围裙样表现、微结节和模糊结节样表现可能是 TBP 的重要鉴别特征。无摄取和/或局灶摄取、肿块和饼样表现可能是 PC 的重要鉴别特征。
