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Volume 90, Issue 1, Pages 23-29 (January 2009)


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Partial breast irradiation as sole therapy for low risk breast carcinoma: Early toxicity, cosmesis and quality of life results of a MammoSite brachytherapy phase II study

Yazid BelkacémiabeCorresponding Author Informationemail address, Marie-Pierre Chauvetb, Sylvia Giardb, Sylviane Villettea, Thomas Lacorneriea, François Bonodeauc, Marie-Christine Baranzellid, Jacques Bonneterrebe, Eric Lartigauae

Received 28 August 2007; received in revised form 23 May 2008; accepted 18 June 2008. published online 11 August 2008.

Abstract 

Purpose

The MammoSite is a device that was developed with the goal of making breast-conserving surgery (BCT) more widely available. Our objective was to evaluate the MammoSite device performances after an open cavity placement procedure and quality of life in highly selected patients with early-stage breast cancer.

Methods and materials

From March 2003 to March 2005, 43 patients with T1 breast cancer were enrolled in a phase II study. The median age was 72 years. Twenty-five (58%) patients were treated with high-dose rate brachytherapy using the MammoSite applicator to deliver 34Gy in 10 fractions. The main disqualifying factor was pathologic sentinel node involvement (10/43; 23%). There were no device malfunctions, migration or rupture of the balloon.

Results

After a median follow-up of 13 months, there were no local recurrences and one contralateral lobular carcinoma. Seventeen (68%), 13 (52%), 8 (32%), 5 (20%) and 2 (8%) patients had erythema, seroma, inflammation, hematoma and sever infection, respectively. Only 2 patients developed telangiectasia. At 1 year the rate of “good to excellent” cosmetic results was 84%. Significant changes in QoL were observed for emotional and social well-being between 3 and 12 months. At 24 months, only emotional well-being subscore changes were statistically significant (p=0.015).

Conclusions

Our data in patients older than 60 years support the previously published data. Histologic features were the main disqualifying criteria. With higher skin spacing levels we observed very low incidence of telangiectasia. QoL evaluation indicates that baseline scores were satisfactory. Changes concerned emotional and social well-being.

Article Outline

Abstract

Materials and methods

Patients

Treatment planning and irradiation

Assessment of adverse events, cosmetic results and quality of life

Statistical analyses

Results

Adverse events during and after brachytherapy

Seroma

Cosmetic results

Quality of life evaluation

Discussion

Acknowledgment

References

Copyright

Over the past decade, interest in accelerated partial breast irradiation (APBI) after breast conservative surgery (BCS) has increased due to many factors. Those factors include both clinical and pathologic data of questioning the need of whole breast irradiation (WBI) in selected patients as well as factors including patient convenience, access and acceptance of radiation therapy (RT). In patients aged more than 70 years [1] and another selected group of patients >60 years with lesions <10mm [2], the addition of RT to tamoxifen did not impact survival and deaths were mainly due to other causes than breast cancer. Thus, in this category of patients, APBI delivered over 5 days instead of 5–6 weeks could be a serious therapeutic option allowing an increase of quality of life (QoL) and observance of RT [3].

The methods employed in PBI have used interstitial brachytherapy (using low-dose rate (LDR) [4], [5], [6], [7], [8] or high-dose rate (HDR) [4], [8], [9], [10], [11], [12], [13], [14], [15], [16]), external beam RT (using photons [17], [18], [19], [20], electrons and/or proton beams [21]) and intraoperative RT [22], [23], [24].

The results of APBI using HDR or LDR brachytherapy techniques show a 0–4.4% rate of in-breast recurrences when the patients are highly selected. When appropriate selection of patients and clear margins are not ensured, unacceptable recurrence rates ranged between 6.7% and 37% [5], [9], [10], [25], [26]. The results of these studies in terms of local cosmetic outcome after 11–82 months of follow-up period are acceptable, ranging between 67% and 100%.

The MammoSite® brachytherapy applicator (Cytyc Corporation, Marlborough, MA) received clearance for market from the US Food and Drugs Administration in May 2002. Since clearance, 20,000 patients have been treated with MammoSite in the US.

Our single institution prospective phase II study is one of the first studies initiated in Europe to evaluate the performances of the device used for APBI as a sole post-operative modality after BCS. We report our experience in terms of feasibility, acute reactions, late toxicity, cosmetic results and QoL using the MammoSite device in a highly selected population of patients.

Materials and methods 

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Patients 

Between March 2003 and March 2005, 43 patients were enrolled in this study. All patients were specifically and explicitly informed that efficacy of APBI has not been established yet. All have signed informed consent. The institutional review board and ethical committee approved the study.

Eligibility criteria were age ⩾60 years, histology tumor size ⩽2cm, invasive ductal histology, ductal carcinoma in situ component <25%, hormone receptors positive, applicator placement intraoperatively after lumpectomy, surgical margins ⩾5mm, sentinel node negative including immunohistochemical (IHC) evaluation, balloon surface to skin distance ⩾7mm. The median age was 72 years (range: 60–75). Patients’ characteristics are listed in Table 1.

Table 1.

Patients characteristics

Characteristics (n=25)
n (%)
Age (y)
Median72
Mean (±SD)70 (±3)
Range60–75

Breast cup size
B10 (40)
C7 (28)
D+4 (16)
Unknown4 (16)

AJCC classification
T1a7 (28)
T1b10 (40)
T1c8 (32)

Tumor location
Left breast13 (52)
Right breast12 (48)

Specific location in the breast
Lower quadrants6 (24)
Upper quadrants16 (64)
Outer midline3 (12)a

Hormonal receptors status
ER positive25 (100)
PR positive21 (84)
PR negative4 (16)

Surgeryb
Shape of cavity
Oval23 (92)
Rounded2 (8)

Margins status
Negative after 1st surgery23 (92)
Negative after additional2 (8) surgery

Level of node dissectionc
Sentinel node23 (92)
Level II (mid-axilla)2 (8)

MammoSite device25 (100)d
Depth of MammoSite device on CT scan or US (mm)
Median (range)20 (12–54)
Mean (±SD)21 (±9)

Fluid infused (cc)
Median (range)60 (40–70)
Mean (±SD)56 (±9)

HDR brachytherapy
Total dose (Gy)
34Gy in 10 fractions24 (96)
27.2Gy1 (4)e

Hormone therapy
Tamoxifen11 (44)
Aromatase inhibitors14 (56)

SD, standard deviation; HDR, high-dose rate; AJCC, the American Joint Committee on Cancer; ER, estrogen receptors; PR, progesterone receptors; US, ultra-sound.

a

Outer n=11 (44%).

b

Lumpectomy followed by lateral open cavity technique placement of the MammoSite device.

c

All patients had node negative in immunohistochemical evaluation.

d

Under general anesthesia intraoperatively after lumpectomy and clear margins confirmation (⩾5mm).

e

Treatment stopped at day 4 because of abscess development.

Patients were enrolled before lumpectomy for an open implant procedure. Cancer and surrounding healthy tissue margin are removed down to the pectoralis fascia, creating a full-thickness resection. Glandular tissue around the residual cavity is mobilized by superficial and posterior dissection. A small drain (6 or 8G) is applied on muscular fascia before the balloon implant (Fig. 1). The mobilized margins of the residual cavity are shifted to cover the balloon.


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Fig. 1. Drain placement in the lumpectomy cavity for pockets air prevention (A) drain (6 or 8G) applied intraoperatively on the muscular fascia.


Treatment planning and irradiation 

HDR brachytherapy delivery was performed according to the criteria that have been reported in the original US FDA MammoSite clinical study [13]. The treatment planning was performed on CT scan (48h after surgery) for delivering 34Gy in 10 fractions over 5–8 days at 1cm from the balloon surface. A minimum of 6 hours elapsed between the twice-daily fractions. Patients were treated with HDR remote afterloading machine (Nucletron; Holland). The delay between surgery and the beginning of irradiation is 6–7 days.

Assessment of adverse events, cosmetic results and quality of life 

All patients completing APBI underwent evaluation of adverse events, cosmesis and QoL at each visit: 48h, 1, 3, 6 and 12 months and every year thereafter.

The cosmetic evaluation included clinical examination by the surgeon and radiation oncologist and adverse events were scored using the CTC v3.0 scale [27]. The investigator for the final assessment systematically reviewed at least two photographs, frontal and profile views according to the Harvard scale [28].

Patients completed a QoL (Functional Assessment of Cancer Therapy for Breast [FACT-B], version 4) [29] before surgery, at the end of brachytherapy and at each visit thereafter. The mean scores (±SD) for physical, social, emotional and functional well-being and the breast subscale were calculated for each visit and were compared to baseline before surgery.

Statistical analyses 

Synergos Inc. (USA), an independent full service Contract Research Organization (CRO) provided services to manage and analyze the data. Standard statistical methods were employed to analyze all data. The following techniques were used: descriptive statistics, McNemar’s test, Fisher’s Exact test and Wilcoxon Signed Rank and Rank Sum tests. All tests were declared statistically significant if the calculated p-value was less than or equal to 0.05. All tests appear as two-sided p-values.

Results 

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Twenty-five out of the 43 (58%) enrolled patients were qualified for HDR brachytherapy delivery. Among the 18 (42%) non-treated patients, one patient discontinued treatment after the two first fractions because of significant deformation of the balloon by its contact with the chest wall. In the remaining 17 patients, disqualifying criteria were mainly related to histologic issues: 10 patients had the device placed and explanted secondary after final histologic report. All the disqualified patients received standard WBI (50Gy in 25 fractions).

Adverse events during and after brachytherapy 

After a median follow-up of 13 months (range: 1–27), there were no local recurrence and one contralateral lobular carcinoma. One patient who was disease free from breast carcinoma has developed a stomach adenocarcinoma.

There were no other device malfunctions, migration or rupture of the balloon. The acute adverse events are listed in Table 2. The late skin sequelae included breast retraction with asymmetry (n=8; 32%) and grade 1 or 2 fibrosis in 2 patients (8%). In 2 patients grade 1 or 2 telangiectasia occurred at 1 and 2 years of follow-up. These 2 patients had upper outer and upper inner quadrant tumors with skin spacing in the low ranges, 12 and 13mm, respectively.

Table 2.

Adverse events related or not to MammoSite applicator during and after treatment

All events
n
%
Breast erythema1768
Breast seroma1352
Skin inflammation832
Breast hematoma520
Breast retraction and/or fibrosis of the operative bed832
Arm or shoulder pain624
Breast pain312
Teleangiectasia28
Breast fibrosis28
Hyper pigmentation14

Serious adverse events
Breast infectiona28
Breast hematoma28
Gastrointestinal carcinomab14
Skin reactions14

Post-operative serious complications
No2288
Allergic reaction14
Hematoma28

Events related to the MammoSite device
Malfunction after surgery0
Migration after surgery0
Difficulty of removal (scored from 0 to 12)
Median score2
Range1–7
Need of antibiotics1 (4)
Malfunction during irradiation1 (4)c
a

In 1 patient the treatment has been stopped at day 4 because of abscess development.

b

Not related to treatment procedure.

c

Slight modification of the straightness but treatment continued.

The 4 patients who had ⩾grade 2 breast hematoma had skin spacing <20mm (versus ⩾20mm; p=0.016). There was no impact of the other parameters such as site of tumor (p=0.52), the cavity size (p=0.095), skin spacing (p=0.12) and the type of hormone therapy (p=0.54) on the incidence of ⩾grade 2 events.

Seroma 

Thirteen (52%) patients developed breast seroma. The time to onset of the breast seromas ranged between 3 and 45 days after removal. At the last follow-up visit, the breast seromas were completely resolved in 5 out of 13 patients. In the 8 remaining patients, asymptomatic seromas were detected in ultrasound and reported as ongoing at the last visit without need of aspiration.

Seroma incidence was not influenced by skin spacing (p=0.22), the site of implant (p=0.65), the quantity of fluid infused (p=0.43) and the type of hormone therapy administered (p=0.23). In addition, there was no impact of breast seroma development on cosmetic outcome during the first year of follow-up.

Cosmetic results 

The cosmetic results following treatment are presented in Table 3. In summary, during the first 3 months the rates of “good to excellent” cosmetic results were stable in 56% of the patients. This rate increased to 84% at 1 year.

Table 3.

Overall cosmetic results and according to the skin spacing

Post-treatment
Excellent
Good
Fair
Poor
1 month (n=25)3 (12%)11 (44%)11 (44%)0 (0%)
3 months (n=25)7 (28%)7 (28%)11 (44%)0 (0%)
6 months (n=25)11 (44%)9 (36%)4 (16%)1 (4%)
12 months (n=19)5 (26%)11 (58%)2 (11%)1 (5%)
24 months (n=9)3 (33%)4 (45%)1 (11%)1 (11%)
Last follow-up visit (n=25)9 (36%)9 (36%)5 (20%)2 (8%)

Seroma
1 month (n=25)1 (4%)12 (48%)11 (44%)1 (4%)
3 months (n=25)1 (4%)16 (64%)7 (28%)1 (4%)
6 months (n=23)018 (78%)4 (17%)1 (5%)
12 months (n=19)018 (96%)1 (4%)0
24 months (n=9)07 (78%)2 (22%)0

Skin spacing (mm)ExcellentGoodFairPoor
Cosmetic results at last follow-up by skin spacing
12–150 (0%)5 (20%)2 (8%)0
16–192 (8%)01 (4%)0 (0%)
⩾207 (28%)4 (16%)2 (8%)2 (8%)

Total9952

Correlation tests between cosmetic results and grade ⩾2 adverse events were performed. At 1month post-treatment, there was a borderline statistically significant difference in skin inflammation between the “good to excellent” results (7.7%) compared to the “poor to fair” results (45.5%; p=0.06). At 3 months breast erythema grade ⩾2 was significantly correlated to cosmetic results (12.5% in the “good to excellent” versus 57% in the “poor to fair” group; p=0.045). The strongest trend of excellent cosmetic outcome was observed in patients with skin spacing ⩾19mm (50%) compared to patients with <19mm (11%; p=0.087).

Quality of life evaluation 

The overall mean (±SD) QoL score at baseline was 76.65 (±12) (median 73.58; ranging from 57.8 to 102.33). QoL scores of patients during follow-up were compared to the baseline values. Fig. 2 illustrates the changes of QoL profiles during follow-up. At 1 month only emotional well-being subscore change from baseline was statistically significant (p=0.006). At 3, 6 and 12 months, emotional (p=0.027; 0.022; 0.004, respectively) and social/family (p=0.006; 0.043; 0.013, respectively) well-being changes from baseline were statistically significant. At 24 months only changes in emotional well-being subscores were statistically significant (p=0.015). Parameters such as the type of hormone therapy administered, adverse eventsgrade 2 and cosmetic results did not influence the QoL profiles changes.


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Fig. 2. Percentages of changes in QoL profiles, subscale scores during the follow-up period.


In the analysis of cosmetic results versus QoL subscores, there appears to be an improved long-term breast QoL subscores in patients with “good to excellent” cosmetic results compared to “poor to fair” results. However, the number of patients was too small in the last group and the results have to be interpreted with caution.

Discussion 

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The number of reports on MammoSite procedure used as a sole therapy after conservative surgery for invasive breast carcinoma is increasing. After a median follow-up ranging between 11 and 48 months, acute skin reactions, infections and seromas were observed in 5–52%, 0–16% and 26–49%, respectively. “Good to excellent” results are reported in 67–97% of the patients.

Before the MammoSite brachytherapy it is important to select patients. The rates of patients who are explanted for disqualifying criteria range between 4% and 30% [13], [30], [31], [32], [33], [34], [35]. This rate seems to be highly influenced by the placement technique. In the American Society of Breast Surgeons (ASBS) MammoSite breast brachytherapy registry, among the 1403 patients, 619 (44%) had the catheter balloon at time of lumpectomy, 576 (41%) after surgery with ultrasound (US) guidance and 197 (14%) using the scar entry technique [34]. The authors reported that the implant‘ technique was not associated with age, tumor size, bra size, catheter size, skin spacing, radiation recall, cosmesis or recurrence. The premature removal rates were 10%, 6% and 10%, after open cavity, US-guided and scare entry techniques, respectively. However, when the pathology-related reasons for removal were analyzed separately, there was a significant difference between the three techniques. In contrast to post-operative techniques the disqualifying pathology caused no explant. Hypothetical review at an independent breast center [31] showed that if the device had been placed at the time of lumpectomy, 29% of patients would have required device removal for disqualifying histology. In the Tufts-New England Medical (Boston) review of studies (n=204), 31 (15%) patients were not treated and the rate of such failures was lower for patients having post-operative placement of the device (9%) than those undergoing intraoperative placement (19%, p=0.07) [35]. In their initial study [36], the device related issues were the main cause of device removal (26%). In an early review of the ASBS Registry Study, Gittlemann et al. [30] report on 106 patients where the rate of disqualified patients was similar (14%), mainly due to another surgery-related parameter, inadequate skin distance (4%) and poor conformance of the balloon to the cavity (3%).

When considering studies including patients with similar criteria to those advised by the ASBS consensus, or either more restrictive, the rates may be higher. In a recent multicenter study from Europe [37], brachytherapy was not performed in 9 out of 32 patients (28%), including 8 (25%) patients because of pathological issues.

In our experience the overall rate of disqualified patients after a lateral intraoperative placement of the balloon was high, 42%. However, in 34% of the patients the reasons were related to the final histologic issues that were highly restricted. Indeed, IHC evaluation of sentinel node was systemically required before inclusion conversely to numerous other studies where node involvement patients were illegible [13], [31], [32], [33], [34]. Conversely in a recent report from Tsai et al. [38], using an intraoperative placement technique, only 5 out of 51 patients (9.8%) were explanted because of unfavorable final pathological findings. However, inclusion criteria were not restrictive. With regard to other reports, the high rate of disqualified patients in our study is related to most restrictive inclusion parameters, particularly in terms of pathological criteria including margins >5mm and micro metastases or tumor cells in the sentinel node after IHC evaluation. However, for low risk of axillary recurrence (<2%) and absence of any survival benefit recently reported in patients older than 60 years treated without axillary dissection [39], these exclusion criteria should be discussed.

In our study, in addition to the restrictive inclusion criteria, disqualifying parameters were mainly related to histologic issues obtained from the final pathology report. Such restrictive criteria may limit the feasibility of the open cavity procedure. In addition, predictive factors for recurrence are still unknown. For example, none of the 10 patients with positive sentinel node had axillary nodal involvement after axillary dissection.

Another concern with the device placement technique is the significant size of air pockets that may result in poor conformance and dose variations for the breast tissues surrounding the cavity [37]. It is known that when the balloon conforms to the lumpectomy cavity, the prescribed dose extends to 1cm beyond the balloon surface. Although the effective radiation penetration may be closer to 2cm, dosimetric studies revealed that with the 4cm-balloon device only 35% of the initial brachytherapy dose extend to 3cm. Critics of balloon brachytherapy caution that the rapid decline in the radial dose of irradiation from the source may preclude treatment of an adequate volume surrounding breast tissue [40]. While, randomized studies are needed to determine whether this concern is valid, the conformance of the balloon to the cavity seems to be a prerequisite for dose homogeneity in the surrounding tissue.

By improving conformance index, the drain use can also shorten the time to start RT delivery, thereby allowing more rapid completion of local therapy and reduce the risk of infection and also the mean time to start APBI (from 7.2 to 5.1 days; p=0.003) [38]. In our experience, the use of a drain placed intraoperatively around the balloon (Fig. 1) has allowed for a decrease in the formation of air pockets and infections.

In our series antibiotics were not systematically prescribed after implant. The overall rate of breast infections was 8%. Harper et al. reported a wound infection rate of 16.2%, in their first 37 patients, prior to implementing consistent use of prophylactic antibiotics and stringent wound care recommendations [41]. Without antibiotic administration during brachytherapy, Niehoff et al. [37] also reported abscesses before systematic administration of antibiotics that allowed an overall rate of infections of 8.5% in addition to the 4% of mastitis.

Using an open cavity technique, other authors [32], [37], [41], [42], [43], [44], [45] have reported 0–16% of infections (including sometimes mastitis). Agarwal et al. [45] reported wound infection and abscesses in 12% and 2%, respectively, despite the systematic use of antibiotics.

For abscesses, the relation to infected seroma is also not clearly established. Theoretically, larger volume of excision, particularly an excision volume larger than maximal balloon fill volume, could result in air pockets, drainage, seroma and high risk of infections. In the US FDA initial experience reported by Keisch et al. [13], the catheter site drainage and seroma were observed in 52% and 11%, respectively. In the European multicenter study [37], with a drain placement in 1/3 of the patients, the rate of seroma was much greater, up to 43% after a mean follow-up of 20 months.

The type of exploration during follow-up can modify the rates of asymptomatic seromas. In our study, all patients were followed using ultrasound at each visit after treatment. This may explain the high rate of seromas observed after a median follow-up of 13 months (52%). Additionally, cosmetic results during the first year of follow-up were not influenced by seroma development. Conversely, Evans et al. [46] reported from 38 patients who had intraoperative placement of the MammoSite device higher rate of excellent results (83%) in patients without seroma compared to those who developed seroma (61%). In that series, using clinical exam, mammograms and ultrasound for seroma evaluation, the rate of seroma was even higher (76%) than in our experience. The high weight of patients was reported as the sole unfavorable prognostic factor for seroma development (p=0.04). Agarwal et al. [45] reported only 26% of clinically diagnosed seromas at 6 months, suggesting an underestimation of the rate by clinical exam compared to ultrasound.

Besides seroma, skin reactions may influence cosmetic results. The majority of skin reactions are erythema or moist desquamation grade 1 or 2. Their incidence ranges between 30% and 91% [13], [30], [37], [38]. In our series, 68% of the patients experienced grade 1–2 erythema without any impact on cosmetic outcome. The impact of early skin reactions on cosmetic results is uncertain. However, two studies have showed that 67% and 91% of “good to excellent” cosmetic results were observed, respectively, in 91% [37] and 37% [13] of patients who previously presented with acute skin reaction.

“Good to excellent” cosmetic results may be influenced by other parameters such as placement technique, skin spacing and subcutaneous fibrosis. In the US FDA initial experience [13] and the updated report [47], the “good to excellent” results, with the open cavity technique and skin spacing >5mm, decreased following time. The rates were 88%, 83% and 76% after 21, 36 and 48 months, respectively. These rates were highly correlated to the skin spacing [47]. In our experience, while the rates of “good to excellent” cosmetic results were low (only 56%) during the first 3 months, this rate increased to 84% and to 78% at 12 and 24 months, respectively.

Cosmetic results have to be evaluated rigorously according to patients and treatment characteristics. Niehoff et al. [37] reported only 67% of “good to excellent” cosmetic results at 12 months. However, in that study of 32 patients, treatment was completed using the MammoSite device in 23 (72%) patients (either as a boost in addition to WBI in 11 patients or as sole therapy technique for brachytherapy delivery in 12 patients). Additionally, while the last group received 34Gy in 10 fractions twice daily, in the “boost group” the total dose was 7.5, 10 and 15Gy in 1, 3, and 9 patients, respectively. With these schedules, they also reported 26% of telangiectasia at 20 months. All telangiectasia occurred in the patients with balloon-skin distance of 7 to 12mm. Interestingly no telangiectasia was seen in the patients with distance >15mm.

In the updated US FDA experience [47], 40% of the patients had telangiectasia after a median follow-up of 48 months. They occurred in 67% and 29% of the patients with skin spacing of 5–7mm and >7mm (p=0.04), respectively. In addition, skin spacing influenced cosmesis significantly (with 89% of good to excellent if skin distance ⩾8mm versus 58% for 5–6mm; p=0.04).

In this study, we report the highest median skin distance of the literature (20mm; range: 12–54mm) which resulted in the lowest rate of telangiectasia (2 out 25 patients; 8%). While, an interval of 5 years is generally reported before occurrence of telangiectasia [48], this delay seems to be shorter with the MammoSite device use for HDR brachytherapy [37], [45]. This is probably related to maximum skin dose equivalent to 77Gy (alpha/beta=3) for skin distance <10mm (180%) and to 47Gy when skin distance is >10mm (110%) [37].

To our knowledge, in addition to the highest ranges of skin spacing data analyses, our study is also the first prospective report on QoL evaluation after the use of MammoSite brachytherapy after BCS in patients ⩾60 years of age.

QoL after diagnosis of breast cancer varies across individuals [49] and also according to age [50]. However, QoL domains like physical, social and psychological well-being have been found to be comparable to those of women without disease [51]. Initially, women with breast cancer, especially younger women, tend to suffer substantial disruption in their physical functioning, mental health and well-being [52], [53].

In a recent report from Pandey et al. [49] the distance traveled by a patient to the treatment center influenced the breast specific QoL and emotional well-being. Another study has previously identified the significant reduction of the RT observance in elderly patients [3]. Thus, APBI is considered as an option for reducing the time of both travel and treatment during the 5–6 weeks of standard WBI. It can at least preserve the QoL of elderly patients particularly when they suffer from other co-morbidities [3]. The mean baseline values of the QoL scale and subscale in our population aged ⩾60 years were (Fig. 2) slightly higher than the scores reported recently in women with a median age of 47 years undergoing breast cancer treatment with curative intent [49]. The significant changes from baseline concerned emotional and social/family well-being at 3, 6 and 12 months, and only emotional well-being subscores at 24 months. In a series of younger patients, less than 50 years of age, global QoL was significantly lower than non-patient sample of older women (p<0.001). Thus, younger breast cancer survivors are at risk for impaired QoL up to several years after diagnosis [50]. Age is not the only parameter that could influence QoL changes. In postmenopausal women, QoL after tamoxifen or exemestane administration is generally good and stable over a period of 2 years follow-up [54]. In our study, the type of endocrine therapy after BCS did not influence the QoL profiles changes. Conversely, Pandey et al. [55] reported that changes of QoL are observed after initial surgery with a significant decrease of scores after total mastectomy with or without endocrine therapy [53], [55].

In conclusion, to our knowledge, this is the first study since the initial FDA clinical study showing the feasibility of MammoSite brachytherapy procedure following an open cavity technique as a sole therapy in highly selected patients older than 60 years. This is also the first report on QoL during and after APBI using HDR brachytherapy with a MammoSite device.

In addition, a rigorous selection and evaluation of such technique in a homogeneous population is essential. We recently addressed such issue [56] in a letter to editor regarding Niehoff et al. report [37] in which heterogeneous selection of patients and treatments resulted in a decrease of cosmetic results. Thus, we believe that, as for all innovations, any haphazard evaluation may induce doubts compromising the destiny of a technique that might be optimally applied in many patients.

Acknowledgements 

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The authors knowledge Carol Wernecke and Cytyc Corporation for supporting this study. We also thank John Mabie (Synergos Inc., USA) for statistical assistance and Yvette Vendel for handling data and monitoring. We also thank Veronique Cheval for her excellent assistance in the planning and during brachytherapy procedure.

References 

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a Department of Radiation Oncology, Oscar Lambret Anti-Cancer Center, Cedex, France

b Breast Cancer Unit, Oscar Lambret Center, Cedex, France

c Department of Radiology, Oscar Lambret Center, Cedex, France

d Department of Pathology, Oscar Lambret Center, Lille, France

e Lille II University, Lille, France

Corresponding Author InformationCorresponding author. Department of Radiation Oncology, Henri Mondor Hospital, 51 av Marchal de Lattre de Tassigny, 94000 Créteil, France.

PII: S0167-8140(08)00329-0

doi:10.1016/j.radonc.2008.06.004


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