A rare congenital anomaly in which the medial aspect of both breasts are bridged by soft tissue across the midline at the sternum. Symmastia can also result from a cosmetic surgery mishap in which the pouches for breast implants were cut too close to the midline
Solution A proprietary material—Strattice™ tissue matrix—supports the medial repair, giving the surgeon control over the implant location and pocket size
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Ashjian notes that common problems can include "implant rippling, hardening, bottoming-out, malposition, symmastia (implant too close to the sternum), and rupture.