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The adoption of breast-conserving therapy as an acceptable alternative to mastectomy opened the door to a wide and varied range of partial breast reconstruction techniques. The term oncoplastic breast surgery , as suggested by Werner Audretsch in 1993, describes the concept of local tissue rearrangement allowing for wide resection of tumors while preserving or improving breast cosmesis. A contralateral mammaplasty or mastopexy restores symmetry due to the volume loss from removal of the index cancer.
Traditionally, surgical oncologists were trained to remove the cancer at all costs, with less emphasis on the cosmetic result. Many women who have simple excisions appear to have a reasonable cosmetic outcome in the early postoperative period, but early results are sometimes misleading. Postoperative scarring, resolution of the seroma, and radiotherapy reveal the true esthetic outcome months or even years later.
Oncoplastic breast conservation surgery combines sound oncologic principles with plastic surgery techniques, allowing for wide excision of tumors with minimized risk of involved margins and simultaneous prevention of the deformities commonly associated with simple excisions and post radiotherapy fibrosis. It maintains a philosophy that the appearance and function of the breast after tumor excision is important, understanding that the patient will live with this result for the rest of their life. The goals of oncoplastic breast surgery include complete removal of the lesion with negative margins, a good to excellent cosmetic result, and the definitive procedure at a single operation. A comprehensive multidisciplinary oncoplastic approach is necessary for the surgical treatment of breast cancer, requiring coordination with the surgical oncologist, radiologist, plastic surgeon, medical oncologist, pathologist, radiation oncologist, and genetic counselor. As improved breast imaging and neoadjuvant chemotherapy allow a larger number of women to be considered for breast conservation, the combination of oncologic and plastic surgery disciplines also increases the number of women who may be treated with breast-conserving surgery by allowing larger excisions with more acceptable cosmetic results. These techniques are applicable to patients with both noninvasive (ductal carcinoma in situ [DCIS]) and invasive breast cancers. Furthermore, now that excision without radiation therapy is becoming an accepted treatment for some patients with biologically favorable DCIS, widely clear margins are of even greater importance than previously appreciated.
An important goal in caring for a woman with breast cancer is to go to the operating room once and perform a definitive procedure that does not require reoperation. The first attempt to remove a cancer is critical, offering the best chance to remove the entire lesion en bloc, evaluate its true extent and margin status, and achieve the best possible cosmetic result. The concept of a one-stage operation is important in the psychological and emotional recovery of a cancer patient. Fewer procedures allows the patient to quickly move on with her life and the next phase of treatment, if necessary. With this in mind, thorough staging of the cancer preoperatively is imperative to carefully plan the operation. The surgeon should review the patient’s stage, pathology, imaging, risk of recurrence, and risk of developing cancer in the contralateral breast. Whenever possible, the initial breast biopsy should be performed using a minimally invasive percutaneous technique. This provides ample tissue for diagnosis and biomarker analysis and should be possible in more than 98% of cases. Preoperative assessment of tumor biology often allows for neoadjuvant systemic therapy, which can downstage the tumor and convert the definitive operation from mastectomy to breast preservation.
Of utmost importance is a dedicated team approach. Most often, the oncologic breast surgeon makes primary contact with the patient and assumes the role of “leader” to guide the team and ensure excellent communication among all team members. During the initial visit after a cancer diagnosis the oncologic surgeon reviews the diagnosis, tumor biology, and extent of disease to develop a treatment plan. The oncologic surgeon triages which patients would be best served with primary surgical intervention versus neoadjuvant systemic therapy. Ideally, all patients should be presented at a multidisciplinary tumor board to confirm the treatment plan. Patients should be presented again after neoadjuvant therapy to assess their response to treatment and update the multidisciplinary plan as needed to ensure optimal outcomes.
The primary goal of breast conservation is to achieve local control with adequate margins while maintaining breast cosmesis. Unfortunately, as many as 36% of simple excisions fail to achieve adequate margins in a single operation, leading to reexcision, worsening cosmesis, and increased chance of mastectomy. The benefits of breast conservation compared with mastectomy are preservation of a sense of wholeness, improved breast sensation and cosmesis, and limited morbidity and complications from implant-based or autologous reconstruction. The benefits are even greater when adjuvant radiotherapy is recommended.
A few of the factors implicated in poor cosmetic results after breast conservation are age greater than 60, tumors larger than 2 cm, small breast size, reexcision for inadequate margins, improper scar orientation, breast tissue resection greater than 100 cm 3 independent of breast size, breast ptosis, tumors located in the central, medial, or lower quadrants, and radiation dose inhomogeneity. The common theme among all these limitations is that the removal of tissue without proper reshaping of the breast or reduction of the skin envelope allows scarring and postradiation fibrosis to reveal an unreconstructed cavity, imbalance in breast tissue distribution, and distortion of the nipple-areola complex (NAC). These limiting factors are largely overcome when an oncoplastic reconstruction is performed. Oncoplastic breast conservation allows rebalancing of the breast tissue. The surgeon reconstructs the breast with either a volume-displacing or volume-replacing technique. This ability to maintain breast balance while reducing breast volume expands the pool of patients who are candidates for breast conservation. This is of particular benefit to the patient with advanced disease who would need adjuvant radiotherapy regardless of mastectomy.
Currently, as many as 40% to 50% of new breast cancer cases are discovered by modern state-of-the-art imaging. Intraoperatively they are often grossly both nonpalpable and not visible to the surgeon’s eye. Bracketing with multiple hooked wires or wireless technologies can help define the extent of the lesion and guide surgical excision. Bracketing the extent of disease allows the surgeon to excise the entire lesion en bloc, if necessary, including overlying skin, as well as prepectoral fascia, as the anterior and posterior margins. The tissue should be oriented for the pathologist with sutures, other orienting markers, or more precisely with intraoperative specimen inking by the surgeon. Intraoperative two-view specimen radiography is extremely useful in localizing the lesion within the specimen, estimating margin distance, and ensuring complete removal. Taking separate cavity margins after en bloc removal improves the likelihood of achieving negative margins at the index operation, minimizing both the need to return to the operating room for margin reexcision and the compromising of cosmetic outcomes.
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