I would ask: When will your cast be removed? It's either plaster or cast but not both at the same time, and I believe that cast is much more common. Other than that, your question is also okay. If you need more help, especially with Medical Terms, you can contact me. As I have taken several classes, I am quite confident that I can help you study those terms.

yes.... perfect :-)

Thank you, Rachel.

Hi Iris, just a couple of small points: For something like a doctor's appointment (because it's probably planned) I'd use 'going to' or present continuous rather than 'will', and in informal English, we can replace 'have' by 'get': 'When are you going to get your/the cast taken off/removed?' or 'When are you getting your cast taken off/removed?'.

Thank you,Tyler. Of course I'm trying to sound like a native, but sometimes, I think, it's impossible to sound natural for both Americans and British. Besides Joseph, another British teacher said that he would think that I meant "bandage" if I only said "plaster" and could think something else if I only said" cast".