It looks like you are about to be treated for breast cancer, I am sorry to hear this. Yes, I think you will need to have the Mirena coil removed. Do confirm this with your breast cancer team.
I hope everything goes well with your breast cancer treatment and that you will be okay.
Please get back to us if you need any more information or support. You may find it helpful to talk things through with one of the nurses on our helpline. The number to call is Freephone 0808 800 4040 and the lines are open from 9am till 5pm Monday to Friday.
