11例原发性肝脏淋巴瘤CT及MRI影像表现

CT and MR imaging characteristics of 11 cases with primary liver lymphoma

目的探讨原发性肝脏淋巴瘤(PHL)CT及MRI影像特点,提高对该病的诊断水平。方法回顾性分析2012年5月至2019年9月中国人民解放军总医院第五医学中心经穿刺或手术切除病理证实的11例PHL患者的临床资料及影像表现。结果 11例患者中9例为单发,1例为多发,CT平扫表现为低密度,密度较均匀,边界清晰,MRI表现T1 WI呈低信号,T2 WI呈高信号,DWI呈高信号,6例病灶信号均匀,增强扫描病灶呈轻度强化,6例病灶内见血管穿行而无受累,呈"血管漂浮征",2例病灶周围环形强化,呈"靶征"表现,2例病灶可见中央瘢痕延迟强化。结论 PHL的CT及MRI影像表现具有一定特征性,病灶边界清晰,密度/信号较均匀,增强扫描呈少血供表现,"血管漂浮征"及"靶征"具有特征性。

Objective To explore the CT and MRI imaging characteristics of patients with primary liver lymphoma and improve the diagnostic level of this disease.Methods A retrospective analysis was performed in the Fifth Medical Center of Chinese People′s Liberation Army(PLA)General Hospital,from May 2012 to September 2019.Results In this group of 11 cases,9 cases were with solitary lymphoma,and 1 with multiple lymphoma,CT plain scan showed low and uniform density,with clear boundary.MRI showed low signal on T1 WI,high signal on T2 WI,high signal on DWI.6 cases showed homogeneous signal,enhanced scan showed mild enhancement.In 6 cases,there were vessels passing through the lesions without involvement,showing "floating vessels sign".In 2 cases,there were annular enhancement around the lesions,showing"target sign".In 2 cases,there were delayed enhancement of central scar.Conclusion The CT and MR images of primary liver lymphoma showed clear lesion boundaries,mainly uniform density/signal,characteristic"vascular floating sign"with uneven density/signal.The enhancement of"target sign"and patchy enhancement should be considered as the possibility of this disease.