The term intracranial cavity is identified in base64 scheme by the sequence aW50cmFjcmFuaWFsIGNhdml0eQ==, while the MD5 signature is equal to 18619e85968ecb5646e6f8c36f58aa17. The ASCII encoding of intracranial cavity in hexadecimal notation is 696e7472616372616e69616c20636176697479.