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作者等分析了12例原发性四脑室肿瘤和22例主要占据四脑室的髓母细胞瘤的椎动脉脑血管造影改变。原发性肿瘤中包括有室管膜瘤8例,表皮样瘤、脉络膜丛乳头状瘤,血管母细胞瘤和脑膜瘤各1例。椎动脉造影是经股插管至一侧或两侧椎动脉。此外,8例进行了立体椎动脉造影和血管断层摄影,6例作了CT检查。在大多数病例四脑室有扩张时,小脑上蚓部上后移和脑干前移。因此,小脑上动脉的顶前段、蚓段和顶上静脉向后上移位,而基底动脉和桥中脑前静脉向前移位。肿瘤所引起的小脑后下动脉各段及
The authors analyzed 12 cases of primary IV ventricle tumors and 22 cases of medulloblastomas mainly occupying the fourth ventricle of the vertebral artery angiographic changes. Among the primary tumors, there were 8 cases of ependymoma, 1 case of epidermoid tumor, choroid plexus papilloma, hemangioblastoma, and meningioma. Vertebral arteriography is performed through the femoral cannulation to one or both vertebral arteries. In addition, stereographic vertebral angiography and vascular tomography were performed in 8 cases, and CT was performed in 6 cases. In most cases, when the fourth ventricle expands, the cerebellar superior part moves back and the brain stem advances. Therefore, the anterior and superior segments of the superior cerebellar artery, the temporal segment, and the superior vena cava are displaced posteriorly, whereas the basilar artery and the anterior cerebral vein are displaced forward. The segments of the posterior inferior cerebellar artery caused by tumors and