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S. P. Somashekhar et al.
Immediate Late Long Term Flap failure Loss of skin
and NAC sensation causing impact on sexual function.
Complications of general anaesthesia-DVT, Pulmonary embolism myocardial infarction.
In a nulliparous women-loss of lactation due to detachment of NAC.
Unpleasant scar, patient dissatisfaction
Lymphedema (Breast +/ arm)
Factors Affecting Complications
Patient factor
Surgeon factor
Type of Oncoplsty
Nodal burden
-Local wound healing delayed in older age group smokers, morbidly obese, comorbidity such as diabetes, HTN, hypercholesteronemia and blood clotting disorders. Any previous breast/axillary surgery.
Oncoplastic technique and skill, procedures done during the learning curve.
Higher complication in complex oncoplasty (beyond level 3 oncoplasty)
Concomitant axillary clearance may result in complete de-vascularisation of axilla.
33.2 Complications Specic toOncoplastic Procedures
A.Volume displacement technique B.Volume replacement technique
33.2.2 Seroma
It is accepted that serous uid will accumulate in the surgical bed in virtually all patients after breast and axillary surgery; most are clinically silent [2]. A clinically signicant seroma is dened as a postoperative uid collection that requires one or more aspirations or subsequent drain placement [3]. In a retrospective review of 324 patients who underwent 561 breast or axil­lary surgeries, 8.4% developed a seroma that required intervention [3]. Seroma rates were sig­nicantly lower after breast-conserving surgery than after mastectomy (6 verses 14–16%) [4]
The presence of a seroma signicantly increased the risk of a concurrent or subsequent surgical site infection (8.5 versus 4% in the absence of a seroma). Prolonged seroma forma­tion may also delay wound healing.
Seroma is also a sequela that most often pres­ents at donor sites in case of ap based reconstruction.
33.2.2.1 Management
A wide bore needle percutaneous aspiration in the ofce setting during follow-up visits sufces in most cases, while some may require radiologi­cally guided aspiration of the collected uid. Seroma should not be left to expand without treatment to avoid potential wound breakdown.
Drains are left in reconstruction site until daily drainage drops to less than 30 cc/day consis­tently. This is usually 1 week at the reconstruc­tion site and 2–3weeks at the donor site.
33.2.1 Bleeding andHematoma
Bleeding and hematoma are prevented by metic­ulous homeostasis. Expanding ap pocket, change in colour of ap or skin, tachycardia and anemia are all signs that should raise suspicion. There should be a low threshold for returning to the operating room for evacuation when present in the immediate postoperative period.
33.2.3 Wound Infection
Wound infection at surgical sites are rare. Pre­and intraoperative antibiotics should be given routinely in this surgery. Erythema, swelling or pruritic discharge are signs of infection that should be aggressively treated with antibiotics and/or surgical drainage as necessary. Breast oncoplasty may also be associated with the rela­tively late occurrence of a postoperative breast
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abscess (median 5months, range 1.5–8.0months) [5]. Necrosis of marginally viable fat in the lumpectomy cavity may contribute to this prob­lem (Fig.33.1).
33.2.4 Post BCT Deformity (Fig.33.2)
In certain cases with unfavourable resection defect, if immediate reconstruction is not per­formed signicant breast deformities will likely manifest following completion of the BCT regi-
men. The deformities have been stratied by two major competing schemas.
Berrino and colleagues were the rst to classify post-BCT deformities, by identifying the morphology of the deformity and then ref­erencing this to select a technique of correc­tion [6]. They described the following deformity types:
1. displacement of the nipple areolar complex;
(Fig.33.3).
2. localised deciency of parenchyma and/or
skin;(Fig. 33.4).
3. generalised breast contracture with no local-
ised defects; (Fig.33.5).
4. severe damage with heavily scarred paren-
chyma and skin. (Fig.33.1).
Clough etal. have altered this classication by reordering and combining groups, empha­sising reconstructive choices and including comparison with the opposite breast [7]. The 3
types are:
Fig. 33.1 Major skin necrosis of left breast, secondary to breast conservation surgery for carcinoma of upper outer quadrant with reconstruction using TDAP ap
Fig. 33.2 Parrot beak deformity of left breast after breast conservation surgery
Type 1-deformity of the affected breast with no
contour defects and leading to asymmetry
with the contralateral breast; Type 2-deformity requiring delayed partial
reconstruction; Type 3-severe deformity requiring mastectomy
and whole breast reconstruction.
Fig. 33.3 Nipple areolar complex deviation of the left breast noted during immediate postoperative follow up
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Fig. 33.4 Skin and fat necrosis of the right breast post oncoplastic breast surgery
Fig. 33.5 Poor scar placement with contracture and dis­tortion of breast mound
In clinical application, these classications help to clarify the deformities which typically result when the BCT is performed under subopti­mal condition. It also guides us in reconstruction by emphasizing on identifying what is missing or disordered and on seeking a reasonable match between the two breasts.
S. P. Somashekhar et al.
33.2.4.1 Management
When these post-BCT deformities occur, delayed partial breast reconstruction must be considered. These cases have three potential problems.
First, these patients often present with ongoing disappointment with their breast appearance fol­lowing BCT and with higher cosmetic expecta­tions. Second, breasts previously treated with BCT present limited options [8] for reconstruction due to reduced breast volume, scarring, distorted anat­omy and disturbed vascularity [8]. Third, post­radiation changes must be approached with cautions as correction is technically difcult and results and complications are highly unpredictable (breast recon myocutaneous). Studies have esti­mated the complication rate to be as high as 50% [9] and the nal aesthetic result to be poor [10]. Owing to these serious concerns, the post-BCT reconstruction is limited to contralateral symmetry procedure, local aps or scar revisions requiring minimal dissection of the affected breast, and importing of distant tissues, pedicled or freest cor­rect the skin or/and parenchyma defect.
The recruitment of distant tissues for partial breast reconstruction is to turn rst to pedicled aps and then to free aps if pedicled aps are insufcient or unavailable. Conventional pedi­cled aps options include the latissimus dorsi (LD) muscle or myocutaneous ap and the trans­verse rectus abdominis myocutaneous (TRAM) ap.
With the development of pedicled perforator aps for partial breast reconstruction, more options and possibly lower donor site morbidity through muscle sparing are now available. Laterally based pedicled aps (i.e., LD, lateral intercostal artery perforator, thoracodorsal artery perforator, lateral thoracic) are not suitable for large defects of the medial breast quadrant. The TRAM is the only pedicled ap which reached the medial breast quadrant easily [9]. Its use for partial breast reconstruction, however, generally must be discouraged because this eliminates the use of abdominal wall aps for a local recurrence or a new tumour in the contralateral breast.
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Indication for delayed free ap reconstruction
after BCT defects are real but limited.
For severe breast deformity (Clough Grade III) when non-abdominal pedicled aps are inad­equate or unavailable.
For large breast deformity (Clough grade II) in the medial quadrants;
In conjunction with completion mastectomy for difcult tumour control or major glandular brosis post-irradiation (Berrino Grade IV).
As part of treatment consisting of contralat­eral mastectomy (therapeutic or prophylactic) and correction of ipsilateral post BCT deformity;
With aesthetic abdominoplasty procedure in a patient with long-term follow-up and no further risk of recurrence or developing a new breast cancer.
33.2.5 Local Recurrence
Local recurrence is an important outcome mea­sure; however longer-term studies are required before any denitive conclusion can be made. It has been proposed that local recurrence would be less given the ability to widely excise the tumour. This review of the literature found that on inter­mediate follow-up (up to 4.5years) local recur­rence rate varied from 0 to 1.8% per year and cosmetic failure rates varied from 0 to 18%. Clough demonstrated an actuarial 5-year local recurrence rate using this technique of 9.4% [11]. Another series of 70 patients who underwent oncoplastic surgery for breast cancer demon­strated an actuarial 5-year local recurrence rate of
8.5% [12]
33.2.5.1 Management
Postoperative surveillance is an important approach to detect early recurrence. One concern has been that tissue arrangement of breast paren­chyma could potentially alter the architecture and inuence the pattern of recurrence or ability to screen accurately. Surgical clips at the tumour margin will identify the tumour bed to assist not only with radiation boosts but also postoperative surveillance and exploration, if necessary. The
other question that arises is a delay in the concept of mammographic stabilisation or decrease in the sensitivity of this screening tool.
There was a slight trend toward longer times to mammographic stabilisation in the study group (21.2months for BCT vs. 25.6months for onco­plastic, p = 0.23), which is expected given the additional scarring, inammation and alteration in parenchyma associated with reconstruction. The time to mammographic stability in the onco­plastic group demonstrated a 95% condence interval between 20 and 30months. Sensitivity to mammography was not affected as parenchymal density was similar in both groups [13] This sug­gests longer than 6months screening is necessary in these patients, possibly until about 2.5–3years. Additionally, tissue sampling (ne needle aspira­tion, core biopsy, etc.) is often required given the nature of these combined procedures, and to rule out tumour recurrence. All these issues need to be discussed with the patient preoperatively, as well as the multidisciplinary team.
33.2.6 Post Radiotherapy
Complications
The effect of radiation therapy is different on the two categories of reconstruction methodolo­gies—implants and aps.
33.2.7 In Expander/ Implant
Reconstruction
Oncoplastic principles dictate that plastic recon­struction should not delay adjuvant treatments such as chemotherapy and radiotherapy. Hence the patient will likely proceed with oncological treatment before she is at full or target expan­sion. The plan can be placed at hold until those ontologically indicated therapies are complete and the patient has time to recover. Most expand­ers have ferromagnetic integrated ports so they are not MRI compatible. Any MRI work up for the contralateral breast or other body parts should be completed prior to the placement of the expander.
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33.2.7.1 Management
The higher incidence of capsular contracture in this situation may have to be managed with over expansion to retard the constricting effects of the capsule, or with capsulotomies when the expander is exchanged for a permanent implant. There will likely be “step off” where he radiated skin will tend to “shrink wrap” down to the underlying chest wall contours, creating a sharp demarcation with the implant in the upper pole of the breast. These contour irregularities may be corrected with a biomaterial such as Alloderm acellular human dermis (Lifecell, Branchburg, N) or by fat grafts. Local aps such as thoracodorsal perforator (TDAP) ip, lateral thoracic ap or intercostal perforator aps can be used to recruit vascularised tissue into the defects and amelio­rate contour deformities [14]
33.2.8 In Autologous Reconstruction
Complications of autologous reconstruction are most often related to partial or complete loss of the transported tissues. If this happens, local tis­sue rearrangement may correct the problem. In instances of total ap loss, a second ap (most commonly a free ap) may be recruited once the underlying cause of ap failure has been under­stood and resolved.
In the instance of free tissue transfer alterna­tive donor vessels such as thoracodorsal, internal mammary, contralateral mammary vessels or thoracoacromial are dissected. Reconstruction options for partial defects are very similar to reconstruction of full defects. Occasionally patients with a lumpectomy defect will wish to camouage that defect with a small implant. Often one has to place an implant in the contra­lateral breast as well to achieve a similar shape and size. The implant will have to be of different volumes to account for both the volume resected during lumpectomy and the volume of tropic loss from the secondary effects of XRT. Alternatively, a woman could select for autologous repair [11, 15].
33.3 Complications ofIndividual Flaps
33.3.1 Latissimus Dorsi Flap
1. Donor site morbidity
The most common complications associated with the latissimus dorsi ap are related to the donor site.
Donor site Seroma Formation Range from
3.9% to 79 [16]. Often they are managed on an outpatient basis with needle aspiration; however, on rare occasion, a persistent seam may require surgical debridement of the seroma cavity and long-term closed suction drainage. The risk of seroma may be increased with the extended latis­simus dorsi ap (muscle sparing latissimus vs. extended latissimus aps, the rate of seroma were
62.2% vs. 5.6%).
Delayed wound healing, contour irregular­ity and scar widening can occur when very large
skin paddles are used, the donor site closure may be placed under excessive tension. These compli­cations can be corrected with minor secondary procedures.
33.3.1.1 Lumbar Herniation
The latissimus dorsi muscle forms the rod of the superior lumbar triangle. During ap harvest, inadvertent injury to the aponeurosis of the inter­nal oblique and transverse abdominal muscles which forms the oor of the triangle can lead to lumbar herniation. While this complication is rar­est is important to consider as surgical interven­tion is usually required to repair the hernia and avoid serious complications.
33.3.1.2 Shoulder Weakness,
Stiness andLoss ofMobility
These are other complications which occurs as latissimus dorsi is an important adductor of the arm and internal rotator of the shoulder. These
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complications should be discussed with patients preoperatively; however, in most patients who are not athletes and bodybuilders, the loss of strength and range of motion is negligible and responds well to postoperative physical therapy.
2. Flap loss
The Latissimus dorsi ap has a robust axial blood supply and reliable skin territory, making signicant ap loss unusual. This complication is almost universally associated with injury to the vascular pedicle during ap dissection or twist­ing or kinking of the ap transposition. It is there­fore very important to understand the orientation of the pedicle before and after tunneling through the axilla to avoid iatrogenic ap loss. Partial ap loss has been reported with rates as high as 7 [16]
3. Implant related complications
In cases where a latissimus dorsi ap is used in conjugation with the tissue expander or implant, the risk of prosthetic use are added including implant extrusion, rupture, peripros­thetic infection and capsule contracture. Furthermore, implant migration into the axilla has been reported [16] This complication is eas­ily avoided by securing the lateral ap to the chest wall to close the communication between the mastectomy cavity and ap donor site.
33.3.2 Individualised Risk
Assessment
The development of large scale, multi­institutional data bases has allowed a recent emphasis on individualising risk assessment through statistical modelling. Recently, one of the authors (JYSK) developed the Breast Reconstruction Risk Assessment Score (BRA Score) using widely available resources, like the American Society of Plastic Surgeon Tracking Operation and Outcomes of Plastic Surgeon (TOPS) and the American college of Surgeons National Surgical Quality Improvement Program (NSQIP) database. This tool aims to
provide individualised and quantiable risk assessment for patients undergoing breast reconstruction in an effort to better inform sur­gical decision making and manage patient expectation.
33.3.3 Breast Risk Assessment Score
This score is based on various factors such as:
1. Comorbidities and prior intervantions:
• Hypertension
• Diabetes
• Respiratory disease
• Smoking status
• American society of anesthesiologists score (ASA)
• Stent placement/ ballon angioplasty
2. Previous cancer treatment:
• Chemotherapy
– Radiotherapy – Breast reconstruction
33.3.4 Pedicled Flaps inOncoplastic Breast Surgery
33.3.4.1 Donor Site Morbidity
After harvesting loco-regional pedicle perforator aps for partial breast reconstruction donor site morbidity is reduced to minimum. Only a very limited rate of seroma formation has been observed and treated mainly conservatively. Wound dehiscence of the donor site has only been observed when the wound edges are closed under tension. This is infrequent and managed with local wound care. Data from the recent stud­ies shows a seroma rate of 5.5% in TDAP II aps, compared with no seroma formation in perforator aps. Other postoperative complications observed were wound dehiscence (4%), infection (2%) and hematoma (2%) [17]
33.3.4.2 Partial or Total Flap Losses
They are very rare incidents, and one must exclude coagulopathies or other medical diseases and conditions.
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33.3.4.3 Palpable Fat Necrosis (Figs.33.6, 33.7, 33.8, and33.9)
Fat necrosis of the ap has been observed and can be treated, if necessary by excision and primary
Fig. 33.6 Fat necrosis seen in central quadrant with retraction of nipple areolar complex. A note of surgical clips is made at the primary tumor site
S. P. Somashekhar et al.
Fig. 33.7 Fat necrosis with microcalcication noted on digital mammography which can be confused with tumor recurrence during follow up of the patient
Fig. 33.8 Fat necrosis along with skin thickening at the site of NAC
closure or reconstruction by a local ap. If neces­sary by excision and primary closure or recon­struction by a local ap. If necrosis is too extensive, a mastectomy with total breast recon­struction may be indicated. However, fat necrosis observed during follow-up on radiological imag­ing warrants a biopsy to rule out recurrences.
33.3.4.4 Unpleasing Scars, Flap Contracture andVolume Loss
They are less rare sequelae and may need second­ary surgical treatment. Also, ap reconstruction of breast defects may give a “plugged in” appear­ance which seems to slightly improve after radia­tion therapy.
Finally some patients who undergo partial
breast reconstruction with the TDAP ap docu-
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Fig. 33.9 Well circumscribed fat necrosis seen on tomosynthesis
ment an initial decrease in forward arm eleva­tion and passive abduction which recover over time [17]
Many concerns have been raised about onco­logic safety of oncoplastic surgery. A recent meta-analysis showed that oncoplastic surgery shows to be an ontologically safe procedure, with fewer recurrent rates (4%) compared with breast conservative surgery (7%) alone [18].
After oncoplastic resection margins are more often negative, and if recurrence occurs, they most often occur in the preoperative quadrant of the tumor, and not the location after displacement technique.
Local recurrence rates reported for oncoplas­tic surgery vary from 0 to 7% of patient.
Fig. 33.10 Breast asymmetry after oncoplastic breast surgery
33.3.4.5 Breast Asymmetry (Fig.33.10)
Different ageing processes between the two breasts may result in breast asymmetry. The non­irradiated side may become more ptotic as com­pared to the radiated side. On the contrary, the irradiated side may show signs of total breast atrophy. When the breast asymmetry becomes obvious, fat grafting alone or the contralateral breast remodelling can be considered. The use of lipolling technique, alone or in combination with other reconstruction techniques for the treat­ment of breast defects after tumour resection is gaining great popularity. Fat injection into the breast can signicantly improve small breast defects after lumpectomy. In larger defects, par-
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tial breast reconstruction is preferred using the tissue replacement technique. However, autolo­gous fat grafting is a useful adjunct to improve the nal outcome.
Fat injections into the breast can be consid­ered primarily at the time of breast conservation surgery to limit volume discrepancies between the two breasts, to add fullness superomedially for aesthetically pleasing breast cleavage or cor­rect breast shape. In secondary procedure, fat grafting can be performed to rene volume, pro­jection, or colour irregularities due to ap necro­sis or ap contracture. Fat grafting has also demonstrated success in the treatment of skin atrophy of the breast after irradiation. The mech­anism of action is postulated to be mediated by stem cells included with fat grafting in the intra­dermal plane. The major limitation is that it is time consuming and prolongs operation time, especially in inexperienced hands and the require­ment of staged application.
33.3.5 Free Flaps forPartial Breast
Reconstruction
1. SGAP (Superior gluteal artery perforator
based ap)
33.3.5.1 Flap Failure
The most serious complication specic for free ap reconstruction. Flap failure, partial or com­plete, can be a result from multiple factors. These include:
hibits gluteal ap reconstruction. Patient having had radiation may have scarred or thrombosed IMA vessel also contributing to ap failure.
Postoperative care is important in preserving the integrity of the ap and its perfusion. Excessive motion or inappropriate patient posi­tioning can compromise the ap pedicle. Moreover, frequent ap monitoring by those with knowledge on the signs of ap compromise can potentially lead to a failing ap being saved.
Other complications include.
Bleeding, hematoma, seroma, infection, wound breakdown, scarring pain and pneu­mothorax [19]
33.3.6 Medial Thigh Flaps
Transverse upper gracilis ap, profunda artery perforator ap etc.
Most complications are similar to other free aps like infection, seroma, delayed wound heal­ing around the groin, decient ap volume, con­tour defects, poor scar requiring revision. Other specic complications to these aps are:
Sensory disturbance within the medial thigh, temporary or permanent lymphedema given that the surgical site is over the lymphat­ics of the groin.
33.3.7 TRAM Flap (Transverse Rectus
Abdominis Myocutaneous Flap)
• Microsurgical technique
• Patient anatomy
• Patient risk factors
• Postoperative care
For published series of greater than 10 SGAP
reconstruction, ap failure rate range from 0 to
7.7% [19]. Even with these listed factors, surgical tech-
nique is usually a component of every ap fail­ure, especially complete ap loss. Meticulous microsurgical technique can avoid anastomotic obstruction. Occasionally, patient’s anatomy pro-
33.3.7.1 Flap Failure
Flap failure is the most serious complication. Factors that may increase the risk of ap failure can be divided into two groups: those that are within the control of the patient and those that are not.
Factors that can be controlled by the surgeons are often related to meticulous technique and knowledge of the relevant anatomy. It is due to arterial or venous factors. Venous occlusion due to clot, kinking or twisting of the vascular pedicle is characterised by a ap that becomes congested, oedematous and tense. Arterial occlusion is less
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common and may be due to the same factors but is characterised by a ap that is pale, ashen and soft. Both situations require operative re-exploration.
33.3.7.2 Flap Re-exploration
After the ap sutures are removed and ap exte­riorised, the anastomosis and the vascular pedi­cles are inspected. With venous occlusion, the vein is tense and dilated and may be lled with clotted blood or may have a kink or twist, there­fore, realignment of the pedicle is all that is needed to restore circulation. If there is true thrombosis, management includes takedown of the anastomosis, embolectomy of the venous limb and irrigation of the lumen with heparin. If clot is suspected in the ap or the muscle, throm­bolytic therapy is indicated. Success depends on the relapsed time interval and is most effective when occlusion has been less than 2h.
In case of arterial occlusion there is no pulse and the veins are usually at. The anastomosis is taken down and inspected for thrombin clot or intimal damage. In some cases the vessels are trimmed and the anastomosis is performed again. When there is persistent disruption of ow, vas­cular spasm or a clotting disorder is suspected 4% lidocaine or papaverine HCL may be used along the adventitia of the vessel to promote vasodilation. If the ap is deemed unsalvageable, it is removed and sometimes replaced.
Other factors that can inuence the success of microvascular breast reconstruction are advanced age, ASA status and length of operation are sig­nicant predictors of postoperative morbidity [20]. Undiagnosed hypercoagulability disorder and radiation damage to vessels.
Donor site complications include, but are not limited to contour abnormalities, complex scars, delayed healing, seroma, pain and infection. Abdominal hernia is rare, and abdominal bulge occurs in the vast majority of the cases. The inci­dence ranges from 3 to 10% for unilateral cases and 5 to 15% for bilateral cases. Chronic pain may be due to neuroma formation due to hemo­clips placed on the sensory nerves or nerve entrapment.
33.4 Conclusion-Salient Features
• Volume displacement and volume replace­ment oncoplastic procedures have different spectrum of complications. Volume displace­ment technique during learning curve has high morbidity and complications, whereas volume replacement technique has stable outcome.
• The most signicant patient factors that affect outcome are smoking and high BMI, apart from the other comorbid conditions.
• Level of oncoplastic and concomitant com­plete axillary dissection are the two factors which affect the outcome. Complete axillary dissection when required, devascularized the axillary bed parenchyma with varying outcome.
• Improperly done oncoplastic would be disas­trous and the patient may end up with mastec­tomy if not dealt early.
• Avascular necrosis of the glandular rotation ap, nipple-areolar complex and the skin is very high in an unplanned oncoplasty.
• Incision planning is the key feature in onco­plastic procedures.
• However, oncoplastic can be done safely, in most cases with low morbidity and complica­tions resulting in excellent cosmetic results.
References
1. De La Cruz L, Blankenship SA, Chatterjee A, Geha R, Nocera N, Czerniecki BJ, et al. Outcomes after Oncoplastic breast-conserving surgery in breast can­cer patients: a systematic literature review. Ann Surg Oncol. 2016 Oct;23(10):3247–58.
2. van Bemmel AJM, van de Velde CJH, Schmitz RF, Liefers GJ.Prevention of seroma formation after axil­lary dissection in breast cancer: a systematic review. Eur J Surg Oncol. 2011 Oct;37(10):829–35.
3. Boostrom SY, Throckmorton AD, Boughey JC, Holield AC, Zakaria S, Hoskin TL, etal. Incidence of clinically signicant seroma after breast and axillary surgery. J Am Coll Surg. 2009 Jan;208(1):148–50.
4. Breast-conserving therapy – UpToDate (Internet). (cited 2021 July 14). Available from: https://
www.uptodate.com/contents/breast- conserving­therapy?csi=7a791f3f- c3dd- 4709- 90cb- 556d95b8f60 7&source=contentShare