软组织病变磁共振短T_2信号的病理基础  

Histologic Basis of Soft-tissue Masses for Short T_2 Signals in MRI

作　　者：韩月东[1] 张传山[2] 常英娟[1] 赵海涛[1] 刘满生[1] 徐长杰[1] 

机构地区：[1]第四军医大学西京医院放射科,710032 [2]第四军医大学西京医院病理科,710032

出　　处：《中国医学计算机成像杂志》2002年第5期327-329,共3页Chinese Computed Medical Imaging

摘　　要：分析软组织病变在T2WI出现低信号区的病理基础。材料和方法 :对在T2WI出现低信号区的45个软组织肿块(良性27个 ,恶性18个)进行组织学检查 ,分析其与MR表现之间的关系。结果 :神经鞘瘤、黏液性脂肪肉瘤、软骨肉瘤等为局限性低信号 ,色素性绒毛结节性滑膜炎(PVNS)呈弥漫性低信号。低信号区与病灶内胶原纤维增多 ,细胞成分较少 ,含铁血黄素沉着以及钙化、骨化等相对应。结论 :胶原纤维、钙化和骨化等多种因素都可造成病灶在T2WI出现低信号区 。To analyse the histologic basis of soft-tissue masses for decreased sig nal intensity on T2-Weighted Images.Materials and Methods:Histologic examinatio ns were conducted in 45 lesions(27 benign,18 malignant) that demonstrated low si gnal intensity on T2WI,and its relationship with the MR presentations was furthe r evaluated.Results:The neurilemoma,chondrosarcoma,myxiod liposarcomas,et al,sho wed localized low signal intensity,whereas pigmented villonodular synovitis(PVNS ) demonstrated diffuse low signal intensity.Several histologic structures were f ound comparing to the decreased signal intensity on T2WI,including abundant coll agen,acellularity,calcification,occification,et al.Conclusion:There are several causes,such as collagen,calcification,occification,leading to the low signal int ensity on T2WI.Combining with T1WI,CT and plain film,the pathalogic basises coul d be implicited,with which specific diagnosis could be made to some of the soft tissue tumors.

关 键 词：软组织 肿块 磁共振成像 病理 低信号 

分 类 号：R445.2[医药卫生—影像医学与核医学] R738.[医药卫生—诊断学]