Safety Follow-up Study in Subjects With Silicone Gel-filled Breast Implants as Compared Both to Saline-filled Breast Implants and to National Norms

Inclusion Criteria: Screening Criteria 1. Female 1. age 18 years or older who is a candidate for breast reconstruction (primary or revision) with Allergan silicone implants or saline breast implants (controls) OR 2. age 22 or older who is a candidate for breast augmentation (primary or revision) with Allergan silicone implants or saline breast implants (controls) 2. Exhibit fluency and literacy in English or Spanish Enrollment Criteria 1. Have satisfied all the inclusion and none of the exclusion criteria 2. Have completed the implant surgery 3. Have only one breast implant or have matching breast implants (i.e., both Round Responsive, both Style 410, or both saline) following their qualifying surgery. In the case of silicone, the device(s) must be manufactured by Allergan. 4. Are free of all target diseases at baseline (410 arm only) 5. Have signed the informed consent form, documenting agreement to participate in all required follow-up interviews by internet, phone, or mail and authorizing health care providers to release medical records to study personnel, and have completed the baseline questionnaire prior to implant surgery (prospectively enrolled subjects) For retrospectively enrolled subjects into the 410 arm, in addition to the above, these criteria also apply: 1. Received 1 or 2 Style 410 implants between 2015 and 2019 2. Willing to complete baseline questionnaire at time of enrollment Continuation Criteria (BIFS Arm Only) 1. Have completed baseline and years 1, 2, 3 and 4 follow-up questionnaires available (including the Satisfaction with Breasts and Psychosocial Well-Being modules of the BREAST-Q) 2. Met all enrollment criteria, specifically the minimum age requirements for silicone implants (18 or older for reconstruction subjects and 22 or older for augmentation subjects), and were free of all target diseases at baseline 3. Were enrolled at a site that was selected in the cluster sampling to continue in the BIFS arm Exclusion Criteria: 1. Are transgender 2. If a saline implant subject, have a current or past unilateral or bilateral silicone gelfilled breast implant 3. Investigator decision that subject is not a suitable candidate for a long-term observational study