The term epidural injection is identified in base64 scheme by the sequence ZXBpZHVyYWwgaW5qZWN0aW9u, while the MD5 signature is equal to c71bea7e12c9782c061f2aa66d1d3a9a. The ASCII encoding of epidural injection in hexadecimal notation is 657069647572616c20696e6a656374696f6e.