Auffray-Calvier E, Desal H A, Freund P, Laplaud D, Mathon G, De Kersaint-Gilly A
Service de Neuroradiologie Diagnostique et Interventionnelle, Hôpital G & R Laënnec, CHU, Nantes.
J Neuroradiol. 1999 Dec;26(4):257-61.
Describe the MRI findings in capillary telangiectasias.
Between 1996 and 1999, we observed 9 cases of capillary telangiectasia in 7 patients explored 5 times for posterior fossa symptoms. In two cases capillary telangiectasia was a fortuitous discovery. All patients were explored by MRI with T1 sequences with and without gadolinium injections, turbo spin echo T2 coupled in 5 cases with a double echo gradient echo T2 sequence (TR: 970 ms, TE: 15 and 35 ms). Two patients also underwent vertebral angiography.
The telangiectasia gave a low intensity signal on T1 sequences in 2 of the 9 cases and a discretely high intensity signal on T2 sequences in all cases. After gadolinium injection, 9 telangiectasias showed homogeneous or speckled enhancement. The echo-gradient T2 images showed a very low intensity signal in 7 out of 7 cases on the second echo. At the first echo, 4 capillary telangiectasias were undetectable. The two vertebral angiographies were normal and the follow-up MRI in 5 patients showed lesion stability.
Pontile lesions with no mass effect showing enhancement after gadolinium injection and with or without a discrete T2 high intensity signal but with a frank echo-gradient T2 signal strongly suggest capillary telangiectasia.
描述毛细血管扩张症的磁共振成像（MRI）表现。
1996年至1999年间，我们观察了7例患者中的9例毛细血管扩张症，这些患者因后颅窝症状接受了5次检查。其中2例毛细血管扩张症为偶然发现。所有患者均接受了MRI检查，采用了有和没有注射钆对比剂的T1序列，5例患者采用了涡轮自旋回波T2序列并结合双回波梯度回波T2序列（TR：970毫秒，TE：15和35毫秒）。2例患者还接受了椎动脉血管造影。
9例中的2例毛细血管扩张症在T1序列上表现为低强度信号，所有病例在T2序列上均表现为离散的高强度信号。注射钆对比剂后，9个毛细血管扩张症均显示均匀或斑点状强化。梯度回波T2图像显示，7例中的7例在第二个回波上表现为极低强度信号。在第一个回波上，4个毛细血管扩张症无法检测到。2例椎动脉血管造影正常，5例患者的随访MRI显示病变稳定。
桥脑病变无占位效应，注射钆对比剂后有强化，有或无离散的T2高强度信号，但有明显的梯度回波T2信号，强烈提示为毛细血管扩张症。
