纵隔巨大淋巴结增生的CT诊断（附四例报告）

巨大淋巴结增生是一种少见的淋巴结特发性增大的良性疾病，多发生在纵隔，常误诊为纵隔肿瘤。本研究的目的是提出本病的ＣＴ征象，以及纵隔肿瘤鉴别。经手术、病理证实的纵隔巨大淋巴结增生４例。ＣＴ平后用６０％泛影葡胺１００ｍｌ团注法行增强扫描。纵隔窗观察，窗宽３５０ＨＵ，窗位３５ＨＵ。本病平扫时显示为软组织肿块，呈圆形或椭圆形，边缘光整，密度均匀，钙化发生率低。

CT Diagnosis of Mediastinal Giant Lymph Node Hyperlasia

Giant lymph node hyperplasia is an uncommon benign disease with special large lymph node.Most of them occurs in the mediastinum,often misdiagnosed as a mediastinal tumor.Our study offers the CT sign of this disease and differential points with mediastinal tumors.Materials and Methods:4 caes of mediastinal giant lymph hyperplasia(MGLH)(hyaline-vascular type)confirmed by operation and pathologic study were reviewed.Examinations included plain and enhanced CT scan with contrast agent 60%Meglumini Diatrijoatis 100ml bolus injection,mediastinal window width was 350HU,window lever was 35HU.Results:The CT appearanc was a soft tissue mass round or oval in shape.The density of the mass was homogenous,well defined,and calcification rate was low.The mass were all markedly enhanced with an attenuation simulating aorta on postcontrast scan.Based on these CT features,MGLH might be considered.Conclusion:The MGLH on plain and enhanced scan have certain characteristics.The differential diagnosis must be considered.