This 10-years old girl presented with an osteoid osteoma involving the superior lamina of L2 on the right.
There was some concern about heating of the dura and nerves during the RFA.
We injected air into the epidural space, which likely acted as a barrier to flow of heat. The RFA was successful and her pain disappeared. The RFA images shows the electrode tip (blue arrow) and the air (red arrow). #osteoidosteoma
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