多重枕骨的缺点由蛛网状的使成粒状引起了: 印射的 T2 上的强调

• 作者: Chao-Xuan Lu, Yong Du, Xiao-Xue Xu, Yang Li, Han-Feng Yang, Shao-Qiang Deng, Dong-Mei Xiao, Bing Li Yun-Hong Tian
• 来源期刊: 世界放射学杂志：英文版（电子版）
• 学科: 医学
• 关键词: ARACHNOID GRANULATION OCCIPITAL DEFECT Magnetic resonance imaging COMPUTED tomography T2mapping
• 年，卷（期）: 2012,（7）
• 页码范围: 341-344
• 页数: 4页
• 分类号: R741

摘要

A 56-year-old man presented with a 6-mo history of headache. Although neurological and laboratory examinations were normal, computed tomography (CT) scan was performed which revealed multiple occipital osteolytic lesions, which were suspected to be multiple myeloma. Subsequently nuclear magnetic resonance imaging (MRI) showed that these lesions presented with a cerebrospinal fluid (CSF)-like signal intensity, no diffusional restriction and intrinsic mass-like enhancement on conventional sequences were seen. T2 relaxation time was similar to that of CSF in the ventricles and adjacent subarachnoid space on T2-mapping. Single photon emission CT with 99m Tc-Methyl diphosphonate was performed which revealed no increased radiotracing accumulation. Finally, these lesions were diagnosed as mutiple arachnoid granulations (AGs). The headache was treated symptomatically with medical therapy. On follow up examination after 6 mo no evidence of tumor was detected. This report aimed to illustrate the appearance and differentiation of occipital defects caused by multiple AGs on CT and MRI, with emphasis on the findings from T2 mapping.