Faculty Bibliography

OBJECTIVES: A patient with a breast tissue expander may require a diagnostic assessment using magnetic resonance imaging (MRI). To ensure patient safety, this type of implant must undergo in vitro MRI testing using proper techniques. Therefore, this investigation evaluated MRI issues (i.e., magnetic field interactions, heating, and artifacts) at 3-Tesla for a breast tissue expander with a remote port. METHODS: A breast tissue expander with a remote port (Integra Breast Tissue Expander, Model 3612-06 with Standard Remote Port, PMT Corporation, Chanhassen, MN) underwent evaluation for magnetic field interactions (translational attraction and torque), MRI-related heating, and artifacts using standardized techniques. Heating was evaluated by placing the implant in a gelled-saline-filled phantom and MRI was performed using a transmit/receive RF body coil at an MR system reported, whole body averaged specific absorption rate of 2.9-W/kg. Artifacts were characterized using T1-weighted and GRE pulse sequences. RESULTS: Magnetic field interactions were not substantial and, thus, will not pose a hazard to a patient in a 3-Tesla or less MRI environment. The highest temperature rise was 1.7 degrees C, which is physiologically inconsequential. Artifacts were large in relation to the remote port and metal connector of the implant but will only present problems if the MR imaging area of interest is where these components are located. CONCLUSIONS: A patient with this breast tissue expander with a remote port may safely undergo MRI at 3-Tesla or less under the conditions used for this investigation. These findings are the first reported at 3-Tesla for a tissue expander.

A patient with a severe case of Poland syndrome presented with a painful capsular contracture from a previous implant-based breast reconstruction. She desired the implant to be removed and to proceed with autologous reconstruction, sizeable enough to match the volume of her contralateral breast. A paucity of abdominal donor tissue combined with the patient's hesitancy to acquire an anterior scar excluded this location as a free tissue transfer option. As an alternative donor site, the profunda artery perforator (PAP) flap was chosen. Bilateral PAP flaps were harvested and stacked using anterograde and retrograde anastomoses to the internal mammary vessels. Enough volume was present to fill her chest wall concavity and provide adequate projection to achieve symmetry with her contralateral breast. Her donor sites healed well and remained inconspicuous, without generating difficulties sitting. In conclusion, stacked PAP flaps provide an excellent alternative to an abdominal donor site for achieving large volume unilateral breast reconstruction.

BACKGROUND: Autologous microvascular breast reconstruction is an increasingly common procedure. While arterial anastomoses are traditionally being hand-sewn, venous anastomoses are often completed with a coupler device. The largest coupler size possible should be used, as determined by the smaller of either the donor or recipient vein. While its efficacy has been shown using 3.0-mm size and greater couplers, little is known about the consequences of using coupler sizes less than or equal to 2.5 mm. Methods: A retrospective chart review of patients undergoing autologous breast reconstruction was conducted at NYU Medical Center between November 2007 and November 2011. Flaps were divided into cohorts based on coupler size used: 2.0 mm, 2.5 mm, and 3.0 mm. Outcomes included incidence of arterial or venous insufficiency, hematoma, fat necrosis, partial flap loss, full flap loss, and need for future fat grafting. Results: One-hundred ninety-seven patients underwent 392 flaps during the study period. Patients were similar in age, type of flap, smoking status, and radiation history. Coupler size less than or equal to 2.0 mm was found to be a significant risk factor for venous insufficiency (P = 0.038), as well as for development of fat necrosis (P = 0.041) and future need for fat grafting (P = 0.050). In multivariate analysis, body mass index was found to be an independent risk factor for skin flap necrosis (P = 0.010) and full flap loss (P = 0.035). Conclusions: Complications were significantly increased in patients where couplers of 2.0 mm or less were used, therefore to be avoided whenever possible. When needed, more aggressive vessel exposure through rib harvest, the use of thoracodorsal vessels or hand-sewing the anastomosis should be considered in cases of internal mammary vein caliber of 2.0 mm or less. CLINICAL QUESTION: Therapeutic LEVEL OF EVIDENCE: Level III. (c) 2013 Wiley Periodicals, Inc. Microsurgery, 2013.

BACKGROUND: Autologous breast reconstruction offers higher rates of patient satisfaction, but not all patients are ideal candidates, often due to inadequate volume of donor sites. Although autologous fat grafting is frequently used to augment volume and contour abnormalities in implant-based breast reconstruction, its clear utility in microsurgical breast reconstruction has yet to be defined. Here, we examined patients undergoing autologous microsurgical breast reconstruction with and without the adjunct of autologous fat grafting to clearly define utility and indications for use. METHODS: A retrospective review of all patients undergoing autologous breast reconstruction with microvascular free flaps at a single institution between November 2007 and October 2011 was conducted. Patients were divided into 2 groups as follows: those requiring postoperative fat grafting and those not requiring fat grafting. Patient demographics, indications for surgery, history of radiation therapy, patient body mass index, mastectomy specimen weight, need for rib resection, flap weight, and complications were analyzed in comparison. RESULTS: Two hundred twenty-eight patients underwent 374 microvascular free flaps for breast reconstruction. One hundred (26.7%) reconstructed breasts underwent postoperative fat grafting, with an average of 1.12 operative sessions. Fat was most commonly injected in the medial and superior medial poles of the breast and the average volume injected was 147.8 mL per breast (22-564 mL). The average ratio of fat injected to initial flap weight was 0.59 (0.07-1.39). Patients undergoing fat grafting were more likely to have had deep inferior epigastric perforator and profunda artery perforator flaps as compared to muscle-sparing transverse rectus abdominis myocutaneous. Patients additionally were more likely to have a prophylactic indication 58% (n = 58) versus 42% (n = 117) (P = 0.0087), rib resection 68% (n = 68) versus 54% (n = 148) (P < 0.0153), and acute postoperative complications requiring operative intervention 7% (n = 7) versus 2.1% (n = 8) (P < 0.0480). Additionally, patients undergoing autologous fat grafting had smaller body mass index, mastectomy weight, and flap weight. CONCLUSIONS: Fat grafting is most commonly used in those breasts with rib harvest, deep inferior epigastric perforator flap reconstructions, and those with acute postoperative complications. It should be considered a powerful adjunct to improve aesthetic outcomes in volume-deficient autologous breast reconstructions and additionally optimize contour in volume-adequate breast reconstructions.

BACKGROUND: : Nipple-sparing mastectomy warrants thorough preoperative evaluation to effectively achieve risk reduction, high patient satisfaction, and improved aesthetic outcome. To the authors' knowledge, this review represents the largest series of microsurgical breast reconstructions following nipple-sparing mastectomies. METHODS: : All patients undergoing nipple-sparing mastectomy with microsurgical immediate breast reconstruction treated at New York University Medical Center (2007-2011) were identified. Patient demographics, breast cancer history, intraoperative details, complications, and revision operations were examined. Descriptive statistical analysis, including t test or regression analysis, was performed. RESULTS: : In 51 patients, 85 free flap breast reconstructions (n = 85) were performed. The majority of flaps were performed for prophylactic indications [n = 55 (64.7 percent)], mostly through vertical incisions [n = 40 (47.0 percent)]. Donor sites included abdominally based [n = 66 (77.6 percent)], profunda artery perforator [n = 12 (14.1 percent)], transverse upper gracilis [n = 6 (7.0 percent)], and superior gluteal artery perforator [n = 1 (1.2 percent)] flaps. The most common complications were mastectomy skin flap necrosis [n = 11 (12.7 percent)] and nipple necrosis [n = 11 (12.7 percent)]. There was no correlation between mastectomy skin flap or nipple necrosis and choice of incision, mastectomy specimen weight, body mass index, or age (p > 0.05). However, smoking history was associated with nipple necrosis (p < 0.01). CONCLUSIONS: : This series represents a high-volume experience with nipple-sparing mastectomy followed by immediate microsurgical reconstruction. When appropriately executed, it can deliver low complication rates. CLINICAL QUESTION/LEVEL OF EVIDENCE: : Therapeutic, IV.

ABSTRACT: Because of increased risk for nipple necrosis, many surgeons believe large ptotic breasts to be a relative contraindication to nipple-sparing mastectomy (NSM). A retrospective review was performed on 85 consecutive patients who underwent NSM with 141 immediate perforator free-flap breast reconstructions. We analyzed the subset of patients with large ptotic breasts, defined as cup size C or greater, sternal notch to nipple distance greater than 24 cm and grade 2 or 3 breast ptosis. Of the 85 patients, 19 fit the inclusion criteria. Breast cup size ranged from 34C to 38DDD. There was 1 case of nipple necrosis in the patient with previous breast radiation (5%), 1 hematoma (5%), and no flap losses. Five (26%) patients underwent subsequent mastopexy or breast reduction, a mean of 6.6 months after the primary procedure. We demonstrate that NSM and free-flap breast reconstruction can be safely and reliably performed in selected patients.

BACKGROUND: : The use of perforator flaps has allowed for the transfer of large amounts of soft tissue with decreased morbidity. For breast reconstruction, the deep inferior epigastric perforator flap, the superior and inferior gluteal artery perforator flaps, and the transverse upper gracilis flap are all options. The authors present an alternative source using posterior thigh soft tissue based on profunda artery perforators, termed the profunda artery perforator flap. METHODS: : Preoperative imaging helps identify posterior thigh perforators from the profunda femoris artery. These are marked, and an elliptical skin paddle, approximately 27 x 7 cm, is designed 1 cm inferior to the gluteal crease. Dissection proceeds in a suprafascial plane until nearing the perforator, at which point subfascial dissection is performed. The flap has a long pedicle (approximately 7 to 13 cm), which allows more options when performing anastomosis at the recipient site. The long elliptical shape of the flap allows coning of the tissue to form a more natural breast shape. RESULTS: : All profunda artery perforator flaps have been successful. The donor site is well tolerated and scars have been hidden within the gluteal crease. Long-term follow-up is needed to evaluate for possible fat necrosis of the transferred tissue. CONCLUSIONS: : The authors present a new technique for breast reconstruction with a series of 27 flaps. This is an excellent option when the abdomen is not available because of the long pedicle, muscle preservation, ability to cone the tissue, and hidden scar. CLINICAL QUESTION/LEVEL OF EVIDENCE:: Therapeutic, V

BACKGROUND: Although microvascular coupling devices are used routinely and successfully for venous anastomosis, there are few published reports demonstrating their efficacy for performing arterial anastomosis. It has been the senior author's (C.Y.A.) preference to perform arterial anastomosis using the microvascular coupling device when feasible. METHODS: All microsurgical breast reconstructions performed by the senior author at the New York University Medical Center between 1998 and 2004 were retrospectively reviewed. A total of 60 patients underwent microsurgical breast reconstruction, of which 20 were bilateral, for a total of 80 flaps. RESULTS: Of the 80 flaps performed, there were 47 muscle-sparing TRAM and 22 deep inferior epigastric perforator (DIEP) flaps, and 11 were superior gluteal flaps. Arterial coupling was successfully performed in 60 of 69 flaps based on the deep inferior epigastric artery (87%) and 2 of 11 gluteal flaps (18%); arterial coupling was performed successfully 62 of 74 times (83.9%) when the thoracodorsal artery was the recipient vessel and never performed when the internal mammary artery was the recipient vessel. The overall flap success rate was 100%. CONCLUSIONS: In our large series, we were able to perform a coupled arterial anastomosis in nearly 80% of the cases, without the loss of any flaps. With proper vessel selection and sufficient experience using the microvascular coupler, arterial coupling may be performed in an expeditious, safe, and reliable fashion with minimal morbidity. Though not commonly practiced, use of the coupling device for arterial anastomosis can provide significant time savings, especially in bilateral breast reconstructions