Skin-Sparing Mastectomy and Immediate Tissue Expander Breast Reconstruction in Patients With Macromastia Using the Passot Breast Reduction Pattern

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Skin-sparing mastectomy (SSM) with immediate tissue expander reconstruction poses a challenge in the patient with macromastia or excessive ptosis. Skin reduction via the Wise pattern has been described but is associated with high rates of skin necrosis. The study group consisted of 43 women with grade 2 or 3 ptosis who underwent SSM and immediate reconstruction with tissue expanders, using the Passot (horizontal) skin reduction pattern. Age ranged from 31 to 67 years (mean, 51 years). The endpoints measured were time to final expansion, mastectomy skin flap necrosis, infectious complications, and total complications. Thirty reconstructions were bilateral and 13 were unilateral (73 breasts total). Follow-up ranged from 6 to 55 months (mean, 20). Common comorbid conditions included hypertension (n = 16), obesity (n = 22), and smoking (n = 9). The mean body mass index was 30.6 (range, 19.4–58.6). Twenty-one patients underwent chemotherapy; 12 received radiation. The mean initial fill was 196 mL (range, 0–420 mL), and the mean time to final expansion was 84 days (range, 28–225 days). Five patients did not complete the reconstruction, 2 because of cancer recurrence and 3 because of infection. There were 3 cases of mastectomy flap necrosis occurring after tissue expander placement (7%). There were 7 infectious complications (16%). The use of a horizontal breast reduction pattern at the time of expander placement produces consistently good esthetic outcomes and a low rate of skin necrosis, and it should be considered as an option in patients with macromastia or ptosis undergoing SSM and immediate reconstruction.

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