Table 1

Summary of characteristics of sixteen patients undergoing dual chamber round tissue-expander/implant two-stage breast reconstruction"

Figure 1

Dual chamber round tissue expander A, the illustration of the expander; B, the physical sample of the expander."

Figure 2

The insertion process of the dual chamber round tissue expander A, determination of the size matching between the cavity and the expander; B, the expander is placed at the sub-pectoralis major muscle plane; C, the expander is covered by the serratus anterior muscle fascia on the lateral side; D, injections for both chambers are conducted intraoperatively; E, both ports are buried into the subcutaneous layer of the lateral chest."

Table 2

Relevant information on breast reconstruction of sixteen patients utilizing dual chamber round tissue expander"

Figure 3

Perioperative photos of a patient undergoing dual chamber round tissue-expander/implant two-stage breast reconstruction A, photos of the patient before mastectomy in frontal, 45° oblique, and 90° lateral position; B, photos of the patient when she finished the tissue expansion, while the expanded side got similar shape with the contra-lateral side, which had a linear upper pole slope and a convex lower pole, and the expander, which was injected 260 mL into the upper chamber and 500 mL into the lower chamber, provided the reconstructed side a teardrop shape; C, intraoperative photos of the patients when the prosthesis exchange was finished, and two breasts achieved good symmetry in both lying and upright position; D, photos of the patient sixteen months after the final reconstruction in frontal, 45° oblique, and 90° lateral position, and the two breasts achieved good symmetry."

Figure 4

Perioperative photos of a patient undergoing dual chamber round tissue-expander/implant two-stage breast reconstruction with contralateral mastopexy A, photos of the patient before mastectomy in frontal, 45° oblique, and 90° lateral position; B, photos of the patient when she finished the tissue expansion, and the expander, which was injected 170 mL into the upper chamber and 340 mL into the lower chamber, provided the expanded side a water droplet appearance with a prominent lower pole, while the contralateral side got a moderate ptosis appearance; C, intraoperative photos of the patients, the expanded side was inserted a breast sizer which had the same volume and three-dimensional shape as the final prosthesis, and the contralateral side received temporary sutures to simulate the breast shape post-mastopexy, and two breasts achieved a good symmetry in upright position; D, photos of the patient six months after the final reconstruction in frontal, 45° oblique, and 90° lateral position, and the two breasts achieved good symmetry."