Introduction: Synmastia is a condition in which the breasts are conjoint and the natural intermammary sulcus is obliterated. It is the rarest type of breast implant malpositioning during breast augmentation; however, it is the most difficult one to correct. AlloDerm is an acellular dermal matrix that is assuming a major role in immediate breast reconstruction in recent years.
Methods: In the past 2 years, we have treated 3 thin women, a total of 6 breasts, for correction of synmastia after bilateral immediate breast reconstruction, using tissue expanders and skin sparing mastectomy. All of them suffered from synmastia, which manifested immediately after the mastectomy and accelerated during tissue expander inflation. We exchanged the expander into silicone implants, and during the same procedure we corrected the synmastia, using an AlloDerm sling. A thick sheet of AlloDerm (Life-Cell Corp, Branchbung, NJ) is used and the AlloDerm sheet is designed into a long narrow sling. Then, the sling is sutured into place.
Results: This technique successfully resolved the synmastia.
Conclusion: The use of an AlloDerm sling to reinforce the capsule and the AlloDerm incorporation into it ensures a sound solution with a low recurrence rate.