Implant-Based Breast Reconstruction

Anatomy and Physiology

The pertinent anatomy for implant-based breast reconstruction parallels that of oncologic breast surgery. A key landmark is the inframammary fold, which provides a guide for defining the lower boundary of the pocket for expander placement. Accurate positioning of this fold is essential because it determines the vertical height, symmetry, and cleavage contour of the reconstructed breast(s). Overdissection medially toward the sternum risks creating symmastia, while misalignment of the vertical axis, or excessive inferior dissection, can result in vertical breast dystopia. Careful attention to these anatomic boundaries is critical for optimal reconstructive outcomes.[2]

Indications

Most patients are candidates for breast tissue expanders and implants, and some will elect this option even if autologous tissue reconstruction is possible.[3] The ideal candidate is a thin individual undergoing bilateral mastectomy or unilateral mastectomy with little to no ptosis of the contralateral breast; the latter approach facilitates breast symmetry, as a ptotic breast is extremely challenging to recreate with an implant.[4] Patients with obesity and large contralateral breasts may experience complicated expander and implant results, both in terms of final breast shape and contour and intraoperative placement. The expansion process may not achieve symmetry or a satisfactory definition of the new breast due to the presence of thick subcutaneous fat deposits. 

The procedure can be performed immediately following mastectomy, but delayed repair may be appropriate if patients are uncertain about reconstruction or require adjuvant radiation based on final pathology results. The principal advantage of immediate tissue expansion is the avoidance of an additional operation and general anesthetic. This approach also enables collaboration between the breast surgeon and plastic surgeon to optimize preservation of the native skin envelope, improving the aesthetic potential of the reconstruction. However, reconstruction must never compromise oncologic safety. The primary objective remains a complete and safe mastectomy. If unexpected findings arise during surgery, reconstruction can be delayed and revisited once cancer treatment priorities are fully addressed.[5][6][7]

Contraindications

Postmastectomy radiation therapy (PMRT) substantially increases adverse events after implant-based reconstruction, including higher risks of infection, capsular contracture, and implant loss, especially with prepectoral techniques. Results from a 2022–2023 systematic review of prepectoral implant-based breast reconstruction found significantly higher rates of infection (relative risk approximately 2.5), capsular contracture (relative risk approximately 5.2), and implant loss (relative risk approximately 2.9) in irradiated versus nonirradiated breasts.[8] Results from long-term series similarly report failure over time with PMRT; in a cohort of 2133 patients with implants, predicted implant loss at 12 years was 17.5% with irradiation vs 2.0% without.[9] 

Earlier Cleveland Clinic data showed that PMRT nearly doubled major complications in implant cases with expanders.[10] Radiation during expansion compromises outcomes, and the timing of exchange and radiation fractionation may influence complication rates.[11] Results from recent analyses comparing prepectoral versus subpectoral placement under PMRT have yielded mixed findings. Some study results show worse outcomes with prepectoral placement under PMRT, while others show no significant difference, underscoring the need to individualize treatment plans.[8]

Active cigarette smoking markedly increases the risk of infection, skin flap necrosis, dehiscence, and delayed wound healing after implant-based reconstruction. Patients should receive counseling on nicotine cessation, including pharmacotherapy and referral to evidence-based programs, with biochemical verification when feasible. Many surgeons decline immediate reconstruction for active smokers, particularly with tissue expanders and implants, and may defer autologous options until sustained abstinence is demonstrated. When reconstruction is pursued, documented nicotine cessation before surgery and throughout expansion is essential to reduce complications and implant loss, and shared decision-making should clearly communicate the elevated risk profile and potential need to delay or modify the reconstructive plan.[12]

Equipment

During implant-based reconstruction, surgeons often keep multiple implant shapes and sizes available in the operating room to accommodate individual patient needs. While the final choice is guided by the pocket created during dissection, accurate preoperative planning improves efficiency and outcomes. Biodimensional planning (matching implant width, height, and projection to a patient’s chest wall and soft-tissue envelope) has become standard, and tools such as 3-dimensional surface imaging and virtual surgical planning further refine size predictions. Some surgeons use intraoperative sizers to confirm volume and contour before committing to a permanent implant.

Preoperative factors, such as body mass index, breast shape, skin quality, and footprint, remain essential for informed decision-making. Intraoperatively, the use of lighted retractors improves visualization, particularly in tight postpectoral pockets, enhancing the safety and accuracy of dissection and implant positioning. Collaboration among the interprofessional team, including the reconstructive surgeon, anesthesiologist, perioperative nurses, and surgical assistants, ensures optimal implant selection, pocket management, and patient safety throughout the procedure.

Personnel

The surgeon may elect to have assistance during the procedure, depending on case complexity and individual preference. While many implant-based reconstructions can be performed independently, a skilled assistant can improve efficiency, facilitate retraction and exposure, and support meticulous handling of tissue expanders or implants. Ultimately, the decision rests with the operating surgeon, guided by clinical judgment regarding patient safety and surgical outcomes.

Preparation

At the initial consultation, patients should be counseled on all reconstructive options, with clear discussion of risks, benefits, and the impact of adjuvant therapies. Referral to survivorship groups or peer support can help patients set realistic expectations and learn from firsthand experiences. Documenting standardized preoperative and postoperative photographs is valuable for both patient education and outcome tracking, as patients can visualize expected results and the care team can maintain objective records. To minimize the risk of infection, intravenous antibiotics should be administered within 60 minutes of incision, with extended postoperative use reserved for select cases, based on current evidence.

Technique or Treatment

The creation of the submuscular pocket for tissue expansion is similar whether performed at the time of mastectomy or later. In the immediate setting, the skin flaps provide access to the inferolateral border of the pectoralis major. Care is taken to preserve the inframammary fold as the pectoralis major is elevated from the chest wall while maintaining its sternal attachments. Many surgeons incorporate an acellular dermal matrix to extend the pocket and support the lower pole of the implant. The use of acellular dermal matrix facilitates faster expansion and reduces discomfort; however, current evidence is largely observational rather than randomized controlled data.

Once the subpectoral pocket is prepared, the tissue expander is placed, and the incision is closed in layers to ensure soft-tissue coverage and stability of the device.[13][14] Tissue expanders have an anterior port that is easily accessed in the clinic for subsequent serial inflation. A drain is then placed in the mastectomy pocket, and the skin is closed. Tissue expansion occurs over several weeks to months after the initial procedure, allowing gradual creation of an envelope of tissue sufficient to accommodate an implant.

In the clinic setting, a magnetic marker can be used to identify the subcutaneous port. Under sterile conditions, the tissue is expanded with serial saline instillation into the device port. Patients are usually instructed to take nonsteroidal anti-inflammatory drugs for pain associated with the expansion.[15] Expansion may occur concurrently with chemotherapy; however, patients should wait until white blood cell counts have normalized before exchange to a permanent implant. If adjuvant radiation is required, active tissue expansion is generally paused to minimize wound complications and expander loss. Expansion can be cautiously resumed after radiation, but patients should be counseled on the significantly higher risks of infection, capsular contracture, and reconstructive failure compared with nonirradiated cases.

Once tissue expansion is complete, the tissue expander is exchanged for a permanent implant. A thorough discussion with patients is imperative to determine the most appropriate type of implant, which may vary depending on institutional resources, surgeon experience, and availability.[16] Implants are available in various forms, including smooth or textured shells, silicone gel (including highly cohesive "gummy" gels), saline, and round or anatomical shapes. In current United States practice, smooth, round silicone implants dominate because macrotextured devices carry a documented risk of breast implant–associated anaplastic large cell lymphoma. These implants were subject to a Food and  Drug Administration (FDA) recall of Allergan BIOCELL devices in 2019; counseling should reflect this risk.[17] Silicone gel has lower early rupture rates than saline and a more natural feel. Surveillance for silent rupture follows FDA guidance, which recommends ultrasound or MRI after 5 to 6 years, followed by every 2 to 3 years.

"Gummy" (highly cohesive) gels maintain upper-pole shape and may reduce visible rippling, while slightly increasing firmness; gel cohesivity should be matched to the soft-tissue quality and patient goals.[18] Profile selection (low, moderate, full, or extra-full) is based on biodimensional planning, particularly breast base width, to achieve the desired projection and footprint. Intraoperative sizers can confirm base width and projection. Placement of the permanent implant involves reopening the prior incision. The expander is explanted, and capsulotomy or capsulectomy is performed as needed for symmetry. The chosen implant is then placed with strict sterility and a layered closure. Adjuncts such as inframammary fold adjustment, fat grafting, or contralateral mastopexy or mammoplasty can refine symmetry, with minor revisions later. For patients receiving PMRT, expectations should be set regarding higher rates of capsular contracture and implant loss, and plane or implant choices tailored accordingly.[19][20]

Complications

Complications of tissue expanders and implants are similar to those seen in cosmetic breast augmentation. Care must be taken intraoperatively to achieve hemostasis. Hematomas carry a high risk of infection and increase the likelihood of capsular contracture. Prompt evacuation of hematomas represents a surgical emergency because of the risk of loss of the overlying skin and soft-tissue envelope. Tissue expander and implant infection can lead to multiple procedures. Although rare and potentially devastating, implant removal and repeat placement may be required once the infection has resolved. Bleeding and infection occur with an incidence of 1% to 2%, respectively.[21] 

Skin flap necrosis resulting from overly aggressive inflation of tissue expanders can be devastating, and care must be taken to ensure adequate blood flow. Patient education is paramount, and any concern about persistent or unusually severe pain or a change in the color of the overlying skin warrants immediate examination and possible partial deflation of the expander. Long-term complications are frequent and range from minor to distressing, but typically do not jeopardize the ultimate success of the reconstruction. These complications include skin rippling, capsular contracture, infection, and implant rupture. Routine surveillance is required to monitor implants for delayed complications.

Capsular contractures are fibrotic scars that form around the implant, representing an extreme example of a foreign body reaction. The scar causes tightening or displacement of the implant and may cause an abnormally firm and painful breast. Contractures are graded based on the Baker scale:

• Grade I: Normal, soft breast that appears natural in shape and size; no discernible capsule
• Grade II: Slightly firm implant with normal appearance
• Grade III: Contracture causes a firm and abnormal appearance
• Grade IV: Hard, distorted, and painful breast

Surgical intervention should be considered for grades III and IV. Grades I and II may develop contractures; therefore, implants in these grades should be monitored more frequently.[22] A link exists between implants and T-cell anaplastic large-cell lymphoma. Although most studies are anecdotal, textured implants may be more closely associated, possibly related to the "salt-loss" technique, chronic inflammation, bacterial biofilm, or other unknown mechanisms. This risk is an emerging indication for breast implant removal, and research into etiology, risk factors, and treatment is ongoing. The incidence is estimated at approximately 1 in 2400 to 1 in 30,000, based on a series of over 3000 patients published in 2020 from Memorial Sloan-Kettering.[23]

Clinical Significance

Patients with breast cancer represent a unique population in reconstructive surgery, with individualized needs that extend beyond technical repair to restoration of body image and quality of life. Tissue expanders and implants remain essential components of the reconstructive armamentarium, offering a relatively straightforward and well-studied option for many patients. Their success, however, depends on careful patient selection, routine surveillance, and willingness to undergo staged procedures. Because these techniques require multiple operations and clinic visits, optimal outcomes are achieved through clear preoperative counseling, ongoing patient engagement, and close collaboration among the surgical and interprofessional care teams.

Enhancing Healthcare Team Outcomes

Breast reconstruction with tissue expanders and implants represents an essential aspect of multidiscip

linary breast cancer care, designed to restore physical form and contribute to psychological recovery following mastectomy. While the reconstructive surgeon is responsible for the technical execution of the procedure, optimal outcomes depend on coordinated contributions from the broader interprofessional team. Preoperative patient assessment, medical optimization, and counseling regarding the risks, benefits, and potential complications of reconstruction are critical steps that extend beyond the operating room.

Interprofessional collaboration is integral to this process. Surgeons work in consultation with medical oncologists and radiation oncologists to ensure reconstructive timing aligns with cancer treatment protocols. Anesthesiologists contribute to perioperative planning, particularly for patients with significant comorbidities. Nursing staff facilitate perioperative support and patient instruction, while primary care clinicians address comorbidities, reinforce smoking cessation, and oversee long-term health. Rehabilitation specialists and survivorship counselors may also participate, offering strategies to improve functional recovery and psychosocial adjustment.

Through shared decision-making, open communication, and recognition of the value of each discipline, the interprofessional team creates an environment that prioritizes patient safety and enhances clinical outcomes. This activity has been developed to strengthen interprofessional competence, with the overarching goal of equipping healthcare professionals across roles to anticipate complications, provide coordinated care, and collectively improve the reconstructive experience and long-term quality of life for patients undergoing breast cancer treatment.