脑微血管畸形影像学诊断及其病理机制探讨

本文分析了45例经手术证实的脑微血管畸形病例的脑血管造影及CT扫描结果。脑血管造影对脑微血管畸形显示率为71.1％。畸形多为单根动脉供血(62.5％),且供血动脉增粗少见;引流静脉早现率较低(40.6％)。根据脑血管畸形血液动力学可分为高血流量低阻力型和低血流量高阻力型,脑微血管畸形多属后者。CT扫描脑内血肿6例,结节状、絮状混染密度影3例,低密度影3例、增强扫描仅3例见结节状强化。本文还对脑微血管畸形影像学特征、病理基础及破裂出血原因进行了探讨。

Cerebral Microvaseular Malformation: Diagnostic Imaging and Pathologic Basis

Cerebroangiographic and CT findings in 45 cases of cerebral microvascular malformations were analysed. Only 71.1% cases were shown by angiography and more than half lesions were supplied by a single artery (62.5%) and some of the arteries were dilatted the veins draining the malformations showed only filling in 40.6%. According to hemodynamics of cerebral vascular malformations we divided them into two types. Most of the microvascular malformations were of the lower blood flow and higher resistence type. Most of the large vascular malformations were of the higher blood flow and lower resistence type. Miscellaneous findings were hematoma (6 cases), nodular mixed density (3 cases) and hypodensty (3 cases). 3 cases showed nodular enhancement. The characteristics of the images and their pathologic basis were discussed correlation between the operation and pathology findings was made. The mechanism of hemorrhage were discussed.