Six E G, Cowley A R, Kelly D L, Laster D W
Neurosurgery. 1980 Sep;7(3):274-8. doi: 10.1227/00006123-198009000-00014.
Computed tomography in a 3 1/2-year-old boy with ataxia, lethargy, fever, vomiting, and increasing irritability revealed moderate hydrocephalus and a blood density mass lesion lying superior and posterior to the 3rd ventricle. On several of the sections, the blood density was greater in the dependent than in the superior portion of the mass. The average attenuation number within the mass was 40 EMI units. The infusion of contrast agent demonstrated capsular enhancement (a target sign), which was also demonstrated by angiography. The diagnosis, which was confirmed at operation, was thrombosis of an aneurysm of the vein of Galen. The massive thrombus was resected, but the aneurysm was not excised. The patient's recovery was uneventful.
一名3岁半患有共济失调、嗜睡、发热、呕吐且易怒症状加重的男孩，计算机断层扫描显示中度脑积水以及位于第三脑室上方和后方的高密度血肿性病变。在几个层面上，血肿的下垂部分比上方部分的血液密度更高。血肿内的平均衰减值为40 EMI单位。注入造影剂显示有包膜强化（靶征），血管造影也显示了这一征象。手术证实的诊断为大脑大静脉动脉瘤血栓形成。巨大血栓被切除，但动脉瘤未切除。患者恢复顺利。
