It does not look like symmastia according to your pictures but you should consult with your surgeon to be sure. Symmastia is a condition which can occur when the implants are too close together. Patients often refer to this as a “uniboob.” This can occur for the same reasons as displacement, but in this case the pocket(s) is/are too far towards the center.Correction of this problem may involve using different implants such as textured, a smaller size, or a smaller base and placing the implants in a new pocket. On occasion, this may require surgery in more than one stage to allow the tissues to heal and then place the implants. If the implants have been placed above the muscle, converting them under the muscle frequently will help and, again, the use of a dermal substitute may be required for additional support if the tissues are thin. The techniques of capsulorrhaphy and neopectoral pockets may apply here as well.