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J Cancer. 2011; 2: 20–25.
Published online 2010 December 8.
PMCID: PMC3005551

Complications of Methylene Blue Dye in Breast Surgery: Case Reports and Review of the Literature

Abstract

Introduction: Methylene blue dye has been used worldwide successfully with few complications in breast surgery. We present two different complications involving methylene blue: 1) skin and parenchymal necrosis when dye was injected in a subdermal fashion and 2) Mycoplasma infection caused by contaminated methylene blue in breast reduction surgery.

Methods: We present two cases seen at the University of Arizona during 2008 and referred to a breast surgeon for management. We evaluated and managed complications of methylene blue dye injected by 2 referring surgeons for different indications. A review of the literature was performed.

Results: The first case is a 67 year old female diagnosed with infiltrating ductal carcinoma of the left breast for which she was treated by her initial surgeon with left segmental mastectomy and sentinel node biopsy. The operating surgeon injected methylene blue in a subareolar subdermal fashion (distant from the primary tumor); unfortunately the patient suffered skin and breast necrosis requiring multiple surgical debridements and finally achieving delayed primary closure. The second case is a 45 year old female with infiltrating lobular carcinoma with a history of Mycoplasma infection secondary to methylene blue injected for breast reduction surgery. She required multiple debridements and had granulomas masquerading as cancer on MRI that confounded her extent of disease.

Conclusions: The use of methylene blue dye in breast surgery is not without risk. In both cases methylene blue was responsible for complications requiring surgical debridement for local wound problems. In each case severe necrosis and infection were present. Methylene blue may cause not only significant morbidity, but may also produce cosmetically unsatisfactory results.

Keywords: Methylene blue, blue dye, complications, breast, surgery, adverse reactions, sentinel node

Introduction

Methylene blue dye (MBD) has been successfully used worldwide with few complications in patients undergoing breast surgery. We herein describe 2 different complications in 2 patients: 1) skin and parenchymal necrosis when MBD was injected subdermally and 2) Mycoplasma infection caused by contaminated MBD in breast reduction surgery.

Several publications advocate the use of subdermal MBD injections for SLN mapping without complications 1-3; however, several publications report complications ranging from blue staining of the skin and fat necrosis 4-6.

The American Society of Clinical Oncology (ASCO) guidelines advocate the use of blue dye in conjunction with radioisotope for SLN mapping as this combined strategy yields the highest rates of successful SLN mapping 7. Some surgeons prefer MBD over Lymphazurin (isosulphan blue dye) because Lymphazurin is more expensive, sometimes unavailable due to national shortages, and may rarely cause anaphylaxis 3, 8. Our objective is to bring to light the fact that although MBD is relatively safe, it is not without potential for serious complications.

Methods

The 2 patients described in these case reports were seen at the University of Arizona Cancer Center during 2008 and referred to a breast surgical oncologist for further care. We evaluated and managed complications of MBD injected by 2 referring surgeons for different indications.

Case Report #1

A 67-year-old woman with a T1b N0 M0 infiltrating ductal carcinoma of the left breast was treated by a surgeon at the referring institution: she underwent a left segmental mastectomy and sentinel lymph node (SLN) biopsy for a 10 mm primary tumor located at the 9 o'clock position. The initial operating surgeon injected MBD in a subareolar subdermal fashion, complicated by MBD skin necrosis.

The patient initially presented describing pain and tenderness of her left breast that persisted for two months following her first surgery. We observed volume loss of the left breast and nipple retraction. We noted a sinus in the 8 o'clock position, draining purulent fluid; erythema surrounding the areola, extending toward the axilla; and fluctuance in the central breast. On breast ultrasound examination, an area of loculated fluid was detected and drained percutaneously. Culture results of this fluid showed Corynebacteria and anaerobic gram negative rods, which was clinically believed to be due to infection of the chronic open wound secondary to MBD necrosis. The patient was started on an oral antibiotic regimen without improvement.

We subsequently admitted the patient to the hospital to perform an incision and drainage (I&D) of her left breast unresolving abscess cavity. We made an incision in the area of maximal fluctuance in the left breast in the periareolar region at 5 o'clock. To explore the borders of the cavity, we used a lacrimal probe; we noted that the cavity was connected to the sinus in the 8 o'clock position. The cavity measured approximately 8cm x 7cm x 2.5cm and contained necrotic tissue. Then, we made a separate incision over the sinus in the 8 o'clock position and completely excised the tract. Once we debrided the cavity, we placed a wound vacuum-assisted closure (VAC) device for negative pressure treatment with suction drainage 9, 10 through 2 separate incisions (Figures (Figures11--44).

Figure 1
The left breast exhibits nipple retraction, erythema, and purulent drainage prior to incision and drainage.
Figure 4
The breast is shown after wound VAC sponge removal and delayed primary closure over drains. Note the volume loss secondary to the MBD skin and breast necrosis.

Case Report #2

A 45-year-old pre-menopausal woman underwent bilateral breast reductions performed by the referring surgeon in 2007. Her surgery was complicated by Mycoplasma chelonae infection secondary to contaminated MBD. She required multiple debridements, which resulted in extensive scar tissue and granuloma formation. The U.S. Centers for Disease Control and Prevention (CDC) have reported contamination of MBD with Mycobacteria chelonae in facelift patients in 200311. However, to our knowledge, infectious contamination of MBD has not been previously reported in any breast surgery patients. The patient's plastic surgeon that had previously performed her breast reductions cultured Mycobacteria chelonae directly from a contaminated bottle of MBD (personal correspondence, microbiology reports). This plastic surgeon had a series of 24 Mycoplasma chelonae infections secondary to MBD on several of his cosmetic surgery patients during a period of 3 months in 2007 (personal correspondence, microbiology reports). This was never reported to the CDC or elsewhere in the medical literature to date.

Our patient's follow-up mammogram showed distortion of the right breast in the upper quadrant, which was thought to be scarring from prior surgery, along with a separate mass, located in the 8 o'clock position, reported with the dimensions of 1.2 cm. We performed an ultrasound-guided core biopsy of that mass and identified Nottingham grade 2 infiltrating lobular carcinoma with associated lobular carcinoma in situ.

A bilateral breast magnetic resonance imaging (MRI) showed a broad region (6.2 x 2.7cm) of abnormal enhancement in the right breast, which was suspicious for lobular carcinoma (Figures (Figures66--7).7). To evaluate the extent of disease, we performed 3 MRI-guided core biopsies: 2 were negative for malignancy, and 1 revealed lobular carcinoma in situ. Thus, MRI was proven to overestimate her extent of disease secondary to her breast infections due to breast reduction.

Figure 6
Note the measurements of the right breast mass per magnetic resonance imaging (MRI).
Figure 7
Bilateral breast MRI with gadolinium depicts the prominent right breast mass which overestimated the extent of disease. MRI measured the mass at 6.2 x 2.7 cm. Pathology measured the tumor at 1.8 cm.

The patient elected to undergo bilateral total skin-sparing mastectomies and right axillary SLN dissection. Final pathology of the right breast revealed a 1.8-cm, multifocal, grade 2, invasive lobular carcinoma with associated lobular carcinoma in situ. Margins were 2 cm from the tumor, with none of the 4 SLNs involved. Her Oncotype DX recurrence score was 19 (intermediate risk). She enrolled in the Trial Assigning Individualized Options for Treatment (Tailor RX) and was randomized to undergo chemotherapy. Her chronic lingering infection was an important factor in the decision to use systemic therapy with cyclophosphamide, methotrexate, and 5-fluorouracil (CMF), to avoid neutropenia. Her history of bilateral breast infections requiring numerous debridements also factored into her decision making to select bilateral mastectomies. She has completed chemotherapy, underwent breast reconstruction and is maintained on tamoxifen hormonal therapy. She eventually successfully completed implant based breast reconstruction.

Discussion

Surgical Considerations

We are aware of only a few published complications of MBD in breast surgery patients (Table (Table11).

Table 1
Known Complications of Methylene Blue Dye in Breast Surgery

Varghese et al 1, described safely injecting MBD in the subdermal plane in the subareolar region with 97.6% identification rate. Their only reported complication was temporary tattooing from MBD, which was also seen on Goavert et al series 12. Mathelin et al 2 and Soni et al 3 both used MBD safely without adverse reactions in SLN mapping. Stradling et al 5 was the first to describe local skin reactions to MBD injection for SLN mapping, including skin necrosis in 5 of 24 patients. Zakaria et al 4 and Salhab et al 6 both reported skin and fat necrosis in a small percentage of patients who received MBD injections for SLN mapping. Komenaka et al 13 described a palpable mass at the site of injection of MBD. Nearly all of the masses resolved by one year, however, one resolved after 18 months. None of the aforementioned patients required surgical debridement. Singh-Ranger et al 14 did report a complication that required surgical revision. They reported capsular contraction associated with MBD, after immediate reconstruction using breast prosthesis. In their case they attributed local inflammatory reaction from the MBD as the main cause of the capsular contraction.

Pathological Considerations

One of our patients (Case 1) presented with a well-developed region of fat necrosis with cavity formation. Fat necrosis is an important diagnostic consideration as it may persist and can clinically mimic carcinoma. Early in its development, fat necrosis is composed of disrupted fat cells and hemorrhage with an influx of histiocytes, some becoming multinucleate as they ingest debris. After several weeks the affected area develops peripheral fibrosis, often with calcification and forming a tumor-like lesion which may clinically mimic carcinoma 15. Attachment to the skin, dimpling and retraction are often evident. Central cystic degeneration may also occur with resultant cavity formation. This type of fat necrosis differs from fat necrosis caused by electrocautery. Electrocautery has evident thermal effect around the edges and involved areas and does not cause such extensive destruction beyond the local tissue perimeter, with several centimeters of fat necrosis, as in the case of our patient.

We are aware of 1 report of MBD contamination with Mycobacteria chelonae that caused infections in patients who had undergone facelifts 11. To our knowledge, our case represents the initial report of contaminated MBD in breast surgery patients. This is of particular concern due to the impact that contaminated MBD had on the surgical and adjuvant management of breast cancer for our patients.

Our 2 case reports confirm the findings of previous publications that complications of MBD are capable of causing tissue necrosis. Of note, both of our patients required extensive surgical debridements, revealing that MBD does indeed have side effects not considered in the previously published literature. In our Case Report #2, the discovery of a complicating Mycobacterial infection led to delayed adjuvant treatment and had a significant impact on our choice for systemic treatment.

The site of injection of blue dyes is still controversial. Historically, Giuliano et al 16, described using blue dye as peritumoral injection with good results; peritumoral injection of blue dye is the most common approach to lymphatic mapping with vital blue dyes. Veronesi et al 17 injected blue dyes subdermally. Intradermal, periareolar or subareolar sites have also been described 18, 19. There are a limited number of studies indicating high success rates of identifying SLNs using subareolar injection of blue dye 20-22. Rodier et al 23, using both blue dye and radiolabelled isotope, found that using periareolar injection was equivalent to using peritumoral injection in identifying SLN. There are several studies supporting the different sites of injection for blue dye, but subareolar and dermal injections have been proven to cause more local side effects, like discoloration of the breast, that can last several months 24. In our case it caused more than just discoloration but led to substantial tissue loss due to necrosis.

Lymphazurin had long been held as the standard for sentinel lymph node mapping in breast cancer25. However, MBD has demonstrated equivalent efficacy in lymphatic mapping compared to Lymphazurin 3, 26-28, is less expensive, more readily available and is not associated with the potentially deleterious side effects of severe allergic reaction, including anaphylaxis 3, 8, 29 as has been reported with Lymphazurin. Raut et al reported an incidence of severe anaphylactoid reaction to lymphazurin of 1.1 %; preoperative prophylaxis reduced the severity, but not the overall incidence (0.5%) of adverse reactions to Lymphazurin blue dye 30. Blue urticaria and facial edema were the reactions observed after preoperative prophylaxis in that study.

As described in the above cases and table, MBD is not without its own potential for complications. The risk for complications of MBD should be taken into consideration when selecting a blue dye for lymphatic mapping. Both MBD and Lymphazurin are vital blue dyes. Either may be used in combination with radioactive colloid and a gamma probe for sentinel lymph node mapping. According to the ASCO guidelines, the greatest proportion of successful mappings and the lowest false negative rates are associated with the use of blue dye and radiolabelled colloid used in conjunction 7. However, Golshan and colleagues 31 have recently published data to show that sentinel nodes can be successfully identified with MBD only. Additionally, they recommend the use of MBD over lymphazurin, due to the latter's known potentially deleterious side effects of severe allergic reaction, anaphylaxis or even death.

The dosing and concentration of MBD, in successful identification of SLN, has been described as 1 - 5 milliliters (ml) of 1% methylene blue 3, 5, 31 or 1.25mg/ml 2, 4. We recommend using dilute MBD based on our institutional experience with this medication. MBD may indeed become the most prevalent vital blue dye for these reasons and due to intermittent national shortages of Lymphazurin blue dye 3. The importance of understanding its proper usage and potential complications, therefore, cannot be understated.

Conclusions

The use of MBD in breast surgery patients is not without risk. In both of these patients, MBD was integral to complications requiring surgical debridements for local wound problems. In each patient's case, severe necrosis and infection were present. Awareness should be raised regarding MBD's potential to elicit tissue necrosis resulting in significant morbidity, cosmetically unsatisfactory results and even delayed cancer treatment.

Figure 2
The probe demonstrates the connection between 2 draining chronic sinus tracts. In the original operation, methylene blue dye was injected in a subareolar fashion.
Figure 3
After debridement of the chronic breast abscess, a single wound vacuum-assisted closure (VAC) sponge was placed in the cavity; 2 VAC pads were used to apply negative pressure therapy through the 2 separate incisions.
Figure 5
This photomicrograph shows tissue from the breast cavity. Note the foamy macrophages digesting dead adipocytes, indicating fat necrosis. The spaces between fat globules are filled by fibrosis.

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