Is it permissible to remove the healthy, contralateral breast to prevent cancer, based on the recommendation of doctors?

It is permissible to remove a healthy breast if physicians predominantly believe it will turn into cancerous cells, by analogy with the permissibility of removing benign tumors that are feared to turn malignant. This falls under necessary therapeutic surgery that removes anticipated harm, based on the principles of Sharia that alleviate hardship and prevent harm, such as "hardship begets ease."