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髓外浆细胞瘤(extramedullary plasmacytoma, EMP)是浆细胞瘤中比较少见的一种类型,是一种罕见的起源于B淋巴细胞克隆浆细胞恶性肿瘤。EMP仅占浆细胞瘤病变的3%~5%[1]。由于本病发病率低,国内外相关的影像学研究文献较少,主要以个案报道为主,而发生于全身多部位淋巴结的EMP国内暂未见文献报道。笔者分析1例确诊为全身多发淋巴结髓外浆细胞瘤的18F-FDG PET/CT影像学表现及鉴别诊断,以提高对该病的认识。
全身多发淋巴结髓外浆细胞瘤18F-FDG PET/CT显像一例
18F-FDG PET/CT imaging of extramedullary plasmacytoma in multiple lymph nodes of whole body: a case report
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摘要: 笔者报道了一例全身多发淋巴结髓外浆细胞瘤的18F-FDG PET/CT显像病例,从临床症状、实验室检查、病理学检查及18F-FDG PET/CT影像学等方面分析该病特点,并通过文献回顾性分析了髓外浆细胞瘤的特点及鉴别诊断。该病例全身多发淋巴结髓外浆细胞瘤18F-FDG PET/CT影像学表现为全身多发部位淋巴结肿大,18F-FDG代谢呈结节状升高,最大标准化摄取值为14.2。18F-FDG PET/CT显像能为全身多发淋巴结髓外浆细胞瘤的诊断提供参考依据。Abstract: The authors report a case of extramedullary plasmacytoma in multiple lymph nodes of whole body of 18F-FDG PET/CT imaging. The characteristics of the disease were analyzed from the clinical symptoms, laboratory examination, pathological examination, and 18F-FDG PET/CT imaging. The characteristics of extramedullary plasmacytoma and differential diagnosis were analyzed retrospectively. Imaging results of 18F-FDG PET/CT showed lymph nodes are swollen at multiple sites throughout the body, and 18F-FDG PET/CT imaging showed noticeable hypermetabolism of FDG in these places with a SUVmax14.2. 18F-FDG PET/CT imaging can provide a reference for the diagnosis of extramedullary plasmacytoma in multiple lymph nodes of whole body.
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图 1 患者男性,36岁,全身多发淋巴结髓外浆细胞瘤18F-FDG PET/CT图像和病理图(苏木精-伊红染色,×100)。图中,A:PET最大密度投影图像;B~D:分别为PET/CT横断位软组织窗图像,PET/CT结果示,双侧颈部及右侧锁骨上下区、右侧腋窝、左侧髂血管旁、盆腔及左侧腹区多发肿大淋巴结,放射性摄取异常增高,SUVmax为14.2;E:病理图,光镜下见大量胞浆丰富的红染核细胞。
Figure 1. The patient was a 36-year-old male, 18F-FDG PET/CT images and pathological images of multiple lymph node extramedullary plasmacytoma
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