腹膜后副神经节瘤18F-FDG PET/CT影像鉴别分析

腹膜后病变中神经源性肿瘤占10%~20%，多位于椎旁交感链（肾脏水平脊柱旁）。而副神经节瘤是指肾上腺外的嗜铬细胞瘤，是起源于神经节神经嵴细胞的肿瘤，可生长于全身各部位，最常见于腹主动脉肠系膜下动脉分支的前方。因其不具备典型的影像学特征和临床表现，常常难以与其他多种腹膜后病变鉴别。笔者选取2例18F-FDG PET/CT显像中不易与其他腹膜后病变相鉴别的副神经节瘤，从其影像学特征及临床特点等方面进行综合分析、鉴别诊断，总结诊断思路，以期为临床工作中得出较为准确的影像学诊断提供帮助。

Differentiatial diagnosis of saracoidosis involving multiple systems using 18F-FDG PET/CT

Neurogenic tumors account for approximately 10%–20% of retroperitoneal lesions and are mostly located in the paraspinal sympathetic chain (kidney-level paravertebral). Paraganglioma is a pheochromocytoma outside the adrenal gland. It originates from ganglionic crest cells and can be seen all over the body. Paraganglioma is most common at the front of the branches of the abdominal aorta and the inferior mesenteric artery. Given that paraganglioma does not have typical imaging features and clinical manifestations, it is often difficult to identify from other various retroperitoneal lesions. In this study, two paraganglioma cases, which were not easy to differentiate from other retroperitoneal lesions in 18F-FDGPET/CT imaging, were selected. A differential diagnosis was also made from their clinical and imaging features. The diagnostic ideas were summarized and analyzed as a reference for accurate imaging diagnosis in clinical work.