Breast Implant Illness Explant Surgery Cause and Treatment *BreastCancer.org Website Breast implant illness (BII) is a term that some women and doctors use to refer to a wide range of symptoms that can develop after undergoing reconstruction or cosmetic augmentation with breast implants. It is also sometimes referred to as autoimmune/inflammatory syndrome induced by adjuvants (ASIA). BII can occur with any type of breast implant, including silicone gel-filled, saline-filled,