原发性肝脏淋巴瘤的^(18)F-FDG PET-CT表现及临床分析

^(18)F-FDG PET/CT Manifestation and Clinical Analysis of Primary Hepatic Lymphoma

目的:探讨原发性肝脏淋巴瘤(PHL)的^(18)F-FDG PET-CT显像特点及其临床表现。方法:回顾性分析经病理确诊的6例PHL的临床资料及^(18)F-FDG PET-CT显像资料。结果:6例PHL患者,男性4例,女性2例,中位年龄65岁,病理类型均为弥漫大B细胞淋巴瘤;^(18)F-FDG PET-CT表现为边界不清的低密度肿块,FDG摄取均较高,SUVmax分别为6.3、9.5、12.8、22.1、28.4、33.5;5例密度均匀,1例病灶内可见低密度坏死;在6例中多发结节型4例,单发肿块型1例,弥漫浸润型1例。5例CT扫描呈轻度强化,2例可见"血管漂浮征"。2例MRI扫描T1WI呈低信号,T2WI呈均匀中高信号,增强扫描后呈轻度强化。结论:PHL的^(18)F-FDG PET-CT表现具有一定的特征性,有助于PHL的诊断。

Objective： To explore the imaging characteristics of ^（18） F-FDG PET-CT and clinical presentation of patients with primary hepatic lymphoma（PHL）. Methods： The ^（18） F-FDG PET-CT image data of 6 patients with pathologically diagnosed PHL, were retrospectively analyzed. Results： The six patients included 4 male cases and 2 female cases, with median age of 65 years old, and all the cases were diagnosed as diffuse large B-cell lymphoma. In regarding of ^（18） F-FDG PET-CT imaging, all the cases showed hypodense masses and high FDG uptake, with homogenous density in 5 cases and necrostic area of low density in 1 case. The SUVmax was 6.3, 9.5, 12.8, 22.1, 28.4, and 33.5, respectively. Three typical PET-CT imaging findings were as follows： 4 cases appeared as multiple nodes, 1 case was the type of solitary mass, and 1 case was the type of diffuse infiltration. 5 cases showed a mild enhancement by CT scanning, and 2 cases displayed ＂blood vessel floating＂ in. In 2 cases, MRI scanning demonstrated low signal intensity on T1WI, and homogeneous signal intensity on T2WI with mild enhancement. Conclusion： The ^（18） F-FDG PET-CT manifestation of PBL has a certain characteristics that can providt helpful to diagnose primary hepatic lymphoma.