Rarely, the outer shell of a breast implant can break. Usually, this is due to folds occurring with abrasion of the outer shell, and is more likely to follow the development of firmness due to capsular contracture. In the event of saline-filled implants, harmless salt water will be absorbed by the surrounding tissues – in this case the leak is easily noticed and the defective implant would be replaced with a new implant. In the event of silicone gel-filled implants, the silicone typically remains in the implant pocket and is not absorbed by the body nor will it migrate into any other part of the body. If an implant rupture is confirmed (usually with an MRI), or is strongly suspected (due to concurrent capsular contracture), the implant can be inspected, removed if necessary, and replaced with a new implant.