Thibaut A, Rumeau C
Neuroradiology. 1978;16:556-7. doi: 10.1007/BF00395359.
The CAT scan is insufficient to make the differential diagnosis between an arachnoid cyst and an epidermoid cyst in the cistern of Galen. Gas encephalography is necessary. This procedure reveals arachnoid cysts of the commmunicating type, but is insufficient in distinguishing between an epidermoid cyst and a non-communicating arachnoid cyst. In this situation, histograms of the absorption values in each section of the lesion may be helpful for the diagnosis.
计算机断层扫描（CAT扫描）不足以对大脑大静脉池内的蛛网膜囊肿和表皮样囊肿进行鉴别诊断。气脑造影是必要的。该检查可显示交通性蛛网膜囊肿，但在区分表皮样囊肿和非交通性蛛网膜囊肿方面并不充分。在这种情况下，病变各层面的吸收值直方图可能有助于诊断。
